MongoDB Changelog

What's new in MongoDB 4.0.24

Apr 16, 2021

Issues fixed:
SERVER-54710 Large number of $or clauses can create profiling entry exceeding max BSON size, causing the query to fail when it should not
SERVER-54136 Make the authenticate command respect enforceUserClusterSeparation
SERVER-53566 Investigate and reproduce “opCtx != nullptr && _opCtx == nullptr” invariant
SERVER-45836 Provide more LDAP details (like server IP) at default log level
SERVER-35649 Nodes removed due to isSelf failure should re-attempt to find themselves
WT-7028 Sweep thread shouldn’t lock during checkpoint gathering handles
All JIRA issues closed in 4.0.24

New in MongoDB 4.0.23 (Feb 18, 2021)

New in MongoDB 4.0.15 (Jan 24, 2020)

Security:
SERVER-45309 Ensure bind credentials live longer than LDAP operations
Sharding:
SERVER-33597 Make allow_partial_results.js, return_partial_shards_down.js start shards as replica sets
SERVER-36865 make fsm workloads that extend kill_rooted_or.js more robust in the sharded concurrency suites, or blacklist them
SERVER-43195 Add namespace to ChunkManager ShardKeyNotFound failure in order to better diagnose failures.
SERVER-44341 Do not choose only first shard of all shards associated with a zone when pre-splitting during shard collection
SERVER-45100 Make the BatchWriteExecutor retry multi-writes only against unsuccessful shards
Replication:
SERVER-35407 ReplicationCoordinatorExternalState and data replication must not be started after shutdown
SERVER-44061 Race while setting replication maintenance mode.
SERVER-44503 Race in replsets/auth2.js
SERVER-45396 fix the “me” field in isMaster responses when using splithorizon
Query:
SERVER-42565 Aggregations and find commands sort missing fields differently
SERVER-45152 Negation of inequality on array can trip invariant
Aggregation:
SERVER-44733 Change stream should throw ChangeStreamFatalError if a single shard cannot be targeted for updateLookup
Storage
SERVER-43910 include Client/OpCtx information in LockManager::dump() output
SERVER-44796 Adjust nojournal startup warning to be more compelling
Operations:
SERVER-45290 Remove upstream metadata from v4.2’s third party library manifest
Build and Packaging
SERVER-44550 Remove mobile specific embedded commands
SERVER-45346 Ubuntu 18.04 package testing task fails to install openssl
Internals:
SERVER-34844 Relax expectations in apply_batches_totalMillis
SERVER-37406 A stashed Locker should keep information about the owning transaction
SERVER-39131 Refactor storage engine lock file support
SERVER-43210 jstests/sharding/kill_sessions.js doesn’t wait for operation to be killed.
SERVER-43246 Add a log line for when a cursor is reaped due to logical session cleanup
SERVER-43349 Incorrect serialization for $elemMatch $not $ne
SERVER-44578 Remove unused db_raii and server_status libs from storage_wiredtiger_core’s LIBDEPS_PRIVATE
SERVER-44828 Correct logic to re-compute dependencies after absorbing a $sort into query layer
SERVER-45472 Ensure RoleGraph can serialize authentication restrictions to BSON
WT-4636 Fix strace in syscall test
WT-5042 Reduce configuration parsing overhead from checkpoints
WT-5106 Remove temporary files in clang-format script
WT-5112 Handling goto labels with multiple words in s_goto.py
WT-5120 Checkpoint hangs when reconciliation doesn’t release the eviction generation
WT-5125 Adding new stats for eviction target strategy
WT-5135 Change lookaside file inserts to use cursor.insert
WT-5169 WT_REF_LIMBO pages cannot support fast (leaf-page only) searches
WT-5196 Data mismatch failures with test/checkpoint after enabling LAS sweep
WT-5218 Improve eviction to differentiate between clean and dirty pages with WT_CACHE_EVICT_NOKEEP readgen
WT-5239 Fix syscall failure about metadata file open
WT-5247 Ensure that only idempotent modify operations are logged
WT-5277 Cursor key out-of-order detected in the lookaside file
WT-5297 syscall.py fail on mongodb-4.0

New in MongoDB 4.0.7 (Mar 22, 2019)

Security:
SERVER-36606 Remove size limits on BSON audit events
SERVER-39202 Improve deterministic calculation of key container names
SERVER-39571 mongod cannot verify certificates from the CNG provider
Sharding:
SERVER-36901 sh.status() “Last reported error:” is actually 5th Latest error message
SERVER-36958 Parts of the _configsvrShardCollection command do not retry on network errors
SERVER-37591 MigrationSourceManager is not exception safe before startClone completes
SERVER-38192 Ignore duplicate key error from refreshLogicalSessionCacheNow
SERVER-38205 Optimize splitVector for the jumbo-chunk case
SERVER-38387 agg_out.js concurrency workload always fails to shard the output collection
SERVER-39203 failcommand_ignores_internal.js fails against mongod 3.6
SERVER-39847 Migrating session info can trigger fassert when destination shard has transaction history truncated by oplog
SERVER-40010 Shard secondaries with 4.0 binary and 3.6 FCV are calling _flushDatabaseCacheUpdates
Replication:
SERVER-35663 Replication recovery does not update the logical clock
SERVER-37179 Wait for specified write concern whenever commitTransaction returns a NoSuchTransaction error
SERVER-37274 commands_that_accept_wc tests can give secondaries priority zero
SERVER-37569 prohibit MapReduce on sessions with txnNumbers
SERVER-37846 writeConcern can be satisfied with an arbiter if the write was committed
SERVER-38297 Killing session on a secondary currently applying prepare oplog entry can fassert
SERVER-38354 Allow shutdown error when reading last applied optime on startup
SERVER-38722 CollectionCloner should handle QueryPlanKilled on collection drop
SERVER-39215 Fix aggregation_currentop.js such that we don’t compare timestamps generated from 2 different sources (mozjs & server).
SERVER-39286 server_write_concern_metrics.js must use requires_journaling tag
SERVER-39490 opWriteConcernCounters can cause undefined behavior due to overflow
SERVER-39641 Blacklist max_time_ms.js from read concern linearizable passthrough
Query:
SERVER-13779 Allow $not to be applied to $regex (currently only /regex/ syntax is allowed)
SERVER-36910 Reduce severity or remove log message for PlanExecutor::DEAD error during find
SERVER-38764 External sorter should use 64-bit integers for file offsets
SERVER-39210 Add debug logging to change_streams/shell_helper.js
SERVER-39472 Backport changes to apply_ops_concurrent_non_atomic.js to account for HMAC key inserts in 3.6 and 4.0.
SERVER-39650 Ensure internal options cannot be specified in a raw aggregate command sent to mongos
SERVER-39771 TextMatchExpression crashes instead of serializing in some cases
Aggregation:
SERVER-31098 Wrong ns in system.profile for aggregation query
SERVER-35740 Report high-water-mark resume token with each (possibly empty) change stream batch
SERVER-38408 Return postBatchResumeToken from all mongoD change streams
SERVER-38410 Allow ARM to consume postBatchResumeToken for merging
SERVER-38411 Propagate postBatchResumeToken through mongoS to client
SERVER-38412 Allow resuming from a high-water-mark resume token
SERVER-38413 Always set an initial postBatchResumeToken
SERVER-38414 Upgrade/Downgrade testing for change stream high water mark
SERVER-38942 Improve robustness of postBatchResumeToken integration tests
SERVER-38975 Single-collection high water marks omit UUID on shards where the collection does not exist
SERVER-39166 $graphLookup should force a pipeline to split in sharded cluster
SERVER-39322 Backport timelib fix for incorrect snprintf invocation with static buffer
SERVER-39394 Views collation check should traverse through nested $lookup pipelines
SERVER-39410 Re-enable batching in DSCursor for change stream cursors
SERVER-39487 Aggregation operator $sqrt output for NumberDecimal is the same as $exp
SERVER-39612 Validate fields in $geoNear
SERVER-40094 Do not prematurely reject resume attempt in DSShardCheckResumability
JavaScript:
SERVER-39481 Remove unused C++ injected JS constructors
Storage:
SERVER-17010 Reduce file handle usage in File based Sorter
SERVER-35449 Return the oldest read timestamp used by any open transaction
SERVER-35732 Hyphenated database names do not work with dbStats.fsUsedSize / TotalSize
SERVER-38555 cappedTruncateAfter must not set oldest timestamp during startup recovery when enableMajorityReadConcern=false
SERVER-38745 MigrationDestinationManager assigns incorrect timestamps while building multiple indexes
SERVER-38801 Cope with large BSON blobs in queryable’s listDirectory call.
SERVER-38833 A failure to timestamp a storage transaction requires restarting the transaction
SERVER-39106 GlobalLock acquisition should throw when ticket acquisition times out if there is a max lock timeout and no deadline
SERVER-39259 Mobile SE: Adjust SQLite Pragmas for Improved Performance
SERVER-39719 Ensure that a node performing an initial sync from a secondary with a in-progress index build creates the index before initial sync is done
SERVER-39723 Change listIndexes command behavior to show in-progress index builds
SERVER-39773 decrease number of updates in rollback_wt_cache_full.js
SERVER-39871 Make catalog_raii_test more resistant to clock issues on Windows
SERVER-39922 Fix lock stats suboperation tests for mobile
Operations:
SERVER-34422 Expose metrics on idle versus active client threads
SERVER-37155 Improve the LDAP server logging
SERVER-38038 mongo shell should be linked with ErrorExtraInfo derivatives
SERVER-38530 Add getResumeToken shell helper
SERVER-39093 Cannot use TLS with readPreference={mode: “secondary”} without specifying –ssl to mongo shell
Build and Packaging:
SERVER-33958 When using thin archives the –cache=nolinked mode should push thin archives to the cache
SERVER-35356 Add release process builder for embedded SDKs
SERVER-35737 install_compass fails on MacOS
SERVER-39354 Remove SCons cache pruning from prior branches
SERVER-39483 Stripped binaries and .debug files should not be cached
Tools:
TOOLS-2030 mongodump does not dump system.js collections
TOOLS-2109 Build Tools with Go 1.11
TOOLS-2166 mongoimport –uri logs incorrect connected hosts
Internals:
SERVER-35138 service_state_machine.cpp should log a backtrace if there’s an uncaught exception
SERVER-35551 Mongobridge nodes don’t remember their network partition configuration after a restart
SERVER-36231 Mongos write path doesn’t look for retryable write concern errors
SERVER-37183 BSONElement::safeNumberLong is not safe
SERVER-37382 printShardingStatus.js races with ShardingUptimeReporter thread
SERVER-37620 Improve watchdog_test reliability
SERVER-38319 DBClientRS should propagate URI options through all paths
SERVER-38538 Improve thread safety of PeriodicRunnerImpl
SERVER-38674 –ssl=off builds emit a scons warning
SERVER-38697 Powercycle kill by PID might try to kill the wrong process
SERVER-38725 Maven central release automation cannot close sonatype repository (401 unauthorized)
SERVER-38746 Provide reason for transaction abort
SERVER-38748 Background indexes created through applyOps should run on the command thread
SERVER-38789 Accept connection failure on Windows in ssl_alert_reporting.js
SERVER-38816 Use generate.tasks for required tasks over target runtime
SERVER-38837 Make periodic_runner_impl_test more lenient in OnePausableJobResumesCorrectly
SERVER-38933 currentOp is not resilient to drop shard
SERVER-38954 Increase query execution time for the test case in max_time_ms.js that expects it to hit the time limit
SERVER-39009 Make bulldlogger credentials location configurable via environment variable
SERVER-39014 Incorrect error reported while re-installing with the Windows MSI
SERVER-39019 $elemMatch $ne serialization is incorrect, doesn’t roundtrip
SERVER-39031 Make SCons default –jobs to CPU count
SERVER-39056 Further refine readWriteAnyDatabase
SERVER-39058 Synchronize user set modification in AuthorizationSession with Client
SERVER-39127 Use generate.tasks for already converted tasks on all variants
SERVER-39128 Avoid double-authentication during connect from mongo shell
SERVER-39138 New test suites do not handle excludes properly when dividing suites
SERVER-39212 waitForSecondaries in background dbhash check must wait for lastApplied to reach clusterTime when enableMajorityReadConcern=false
SERVER-39232 Allow commands that do not require auth to refresh sessions
SERVER-39284 Better handle timeouts for generated tasks with repeated execution
SERVER-39303 Coverity analysis defect 105263: Dereference after null check
SERVER-39386 Specifically use the version of the android NDK that we want to use
SERVER-39421 Fix opCtx and baton waits
SERVER-39564 burn_in_tests.py doesn’t run tests in the configuration for *_gen Evergreen tasks
SERVER-39590 improve port_options.js logfile polling
SERVER-39686 Clean up cloud_nightly project file
SERVER-39746 System-Performance: Write project in runtime.yml
SERVER-39779 Don’t override timeouts if not all test have history
SERVER-39822 Improve watchdog_test.exe test reliability
SERVER-39823 Free Monitoring may ignore re-register requests on secondaries
SERVER-39830 Race in PeriodicRunnerImpl between start() and stop()
SERVER-39900 change_streams_resume_at_same_clustertime.js should not assume same that multi-update across shards are performed at the same clusterTime
SERVER-39946 Handle splitting tasks with only filtered test history
SERVER-40034 Set setup_group_can_fail_task to true for compile-related task groups
SERVER-40076 Tag JavaScript tests with the reason they’re unable to run in Atlas
SERVER-40195 Pin all Gradle dependencies
TOOLS-1906 Ignore mongorestore error “x509 certificate routines:X509_STORE_add_cert:cert already in hash table”
TOOLS-2158 mongodump failing on Windows with “error opening system CA store: Access is denied.”
TOOLS-2167 Add CGO flags for building on Windows
TOOLS-2168 Add CGO flags for building on MacOS
TOOLS-2210 Build with tools with Address Space Layout Randomised (ASLR) flags enabled
WT-4447 Add prototype implementation allowing limiting of IO per subsystem
WT-4483 Improve caching of small updates to large values
WT-4518 Give applications a chance to handle panic before API panic returns
WT-4522 Update WiredTiger copyrights to 2019
WT-4528 Retry Windows functions on access denied
WT-4532 Fix null pointer access to WT_DATA_HANDLE in __wt_page_in_func
WT-4547 Consolidate capacity and block manager bytes written
WT-4562 Coverity: possible divide by zero conn_capacity:434
WT-4576 Coverity warning in conn_capacity.c
WT-4615 Sync backup file before returning backup cursor

New in MongoDB 4.0.3 (Oct 3, 2018)

Security:
SERVER-35418 Allow specifying CAs for incoming and outgoing connections separately
SERVER-36456 MongoD does not support kerberos on Windows
SERVER-36827 Warning about “No SSL certificate validation can be performed” is misleading
Sharding:
SERVER-30841 Lower the amount of metadata refresh logging
SERVER-34500 Use causal consistency in database_versioning_upgrade_downgrade.js test when reading from secondary after setFCV
SERVER-35222 Crash on the config server at expired session cleanup
SERVER-35755 CollectionLock acquisition in shard_filtering_metadata_refresh.cpp can cause server to terminate on stepdown
SERVER-35773 MetadataManager directly calls into the CatalogCache
SERVER-36054 Get rid of ScopedCollectionMetadata’s operator bool
SERVER-36116 Get rid of CollectionShardingState::resetAll
SERVER-36130 Migration status reports verify connection strings – but those can change
SERVER-36164 Decouple ScopedCollectionMetadata from MetadataManager
SERVER-36332 CursorNotFound error in GetMore on a secondary with sessions
SERVER-36433 NamespaceSerializer lock should be used during drop database
SERVER-36634 Change FCV check to check for CommandNotFound in _shardsvrShardCollection and write to config after creating collections on non-primary shards
SERVER-37050 wait for replication in session_collection_auto_healing
Replication:
SERVER-35616 Oplog query on initial syncing node can cause segmentation fault
SERVER-35793 Write concurrency test to verify server-wide transactions metrics tracking
SERVER-35821 readConcern:snapshot transactions need a read timestamp <= WT’s all_committed point
SERVER-36127 use w:majority instead of w:2 in apply_batch_only_goes_forward.js
SERVER-36470 Prevent change_stream_failover.js to elect a new primary which is the same as old primary after old primary steps down.
SERVER-36503 Skip dry-run election during election handoff
SERVER-36539 Test that DBClientCursor sends getMore for exhaust cursor if moreToCome is not set
SERVER-36565 Killing a session with a transaction can cause the thread to throw WriteConflictError
SERVER-36746 A failed step down attempt shouldn’t unconditionally reset LeaderMode to kMaster
SERVER-36846 TransactionsMetrics unit test should sleep a bit when trying to assert elapsed time > 0
SERVER-36975 Fix race condition in read_concern_snapshot_catalog_invalidation.js
SERVER-36982 Reintroduce enableMajorityReadConcern:false server parameter
SERVER-36985 Test single replica set transactions immediately after a rollbackViaRefetch
SERVER-37010 Prevent unexpected elections in initial_sync4.js and initial_sync_rename_collection*.js
SERVER-37048 Hold global intent lock whenever accessing the oplog collection pointer
SERVER-37105 Make it clear from the stack trace whether a command is running in a transaction
SERVER-37147 sessions_collection_auto_healing.js should use 2 node replica set
SERVER-37152 Increase write concern timeouts for writes expected to succeed in tags.js
Query:
SERVER-13946 Consider putting skip stages below fetch stages
SERVER-36212 getMore should not enforce that session id matches until FCV is 4.0
SERVER-36299 Implement support for exhaust cursors with OP_MSG in DBClientCursor
SERVER-36435 Increase maxTimeMS timeout in awaitdata_getmore_cmd.js
SERVER-36453 Fix race condition in aggregation_cursor_invalidations.js
SERVER-36944 applyOps does not permit unknown field names when creating a v:1 index
SERVER-36951 applyOps should work with a createIndexes command without a UUID
Aggregation:
SERVER-36993 mongod crash: Invariant failure indexedOr src/mongo/db/query/index_tag.cpp 237
Storage:
SERVER-34577 read_after_optime.js fails on mongoe
SERVER-34606 Test (and possibly fix) behavior around majority commit point and oplog truncation
SERVER-35657 Do not delay journal flushes when operations are waiting for oplog visibility
SERVER-35780 renameCollection across databases incorrectly timestamps metadata for secondary index builds
SERVER-36400 Explicitly destroy the client on exiting the run body of each BackgroundJob
SERVER-36531 Lock acquisition may throw despite presence of UninterruptibleLockGuard when WT tickets are exhausted
SERVER-36879 write regression test for stuck cache issue during rollback
SERVER-36961 createIndexes command should check if index already exists with weak lock
SERVER-36969 initial_sync_wt_cache_full.js takes too long to complete on slow hosts
SERVER-37002 dropping a collection with long index names via rename fails under MMAPv1
SERVER-37121 Retry timestamping secondary background index builds
WiredTiger:
SERVER-19815 Make repair more robust with the WiredTiger storage engine
Operations:
SERVER-27588 Warning to disable defrag of transparent_hugepages when thp is disabled
SERVER-33606 mongo shell startSession() should fail if the server doesn’t support logical sessions
SERVER-34864 String-valued fields should not participate in schema change detection in ftdc
SERVER-35989 Mongo shell needs a countDocuments function
Build and Packaging:
SERVER-29908 Libraries db/s/sharding and db/query/query are directly cyclic
SERVER-33911 Allow overriding global link model for specific targets
SERVER-33912 Remove –disable-warnings-as-errors from embedded builds
SERVER-34007 Relicense Embedded SDK Builds
SERVER-35078 Build embedded SDK with bitcode
SERVER-35184 Enable link-time-optimization for embedded SDK builders
SERVER-36884 Update curator version on stable branches
SERVER-36943 Build embedded targets with -Wl,-object_path_lto
SERVER-37138 Revert to always building with bitcode
SERVER-37157 Create unified darwin builder for embedded
SERVER-37251 Revert to stable channel for Android NDK setup
Tools:
SERVER-30997 mongo cli –password is masked, but not when using mongodb:// connection string
TOOLS-2035 mongofiles_write_concern_mongos.js fails on server unstable
Internals:
SERVER-28990 when started with –repair mongod should not try to bind to a port
SERVER-33908 Add pre and post invocation background activity hooks to CAPI implementation
SERVER-33978 References to sudo in evergreen.yml should use ${set_sudo}
SERVER-34120 scoped connection not being returned to the pool
SERVER-34711 Enable burn_in_tests to understand Evergreen task selectors
SERVER-34798 Replace subclasses of ServiceContext with decorations and flexible initialization code
SERVER-35216 Expose ReplicaSetManager refresh period to the mongo shell
SERVER-35233 Powercycle remote collection validation does not skip views
SERVER-35284 C++ “death test” unit tests should fork before constructing the test fixture, not after.
SERVER-35517 Add failpoint mechanism to the mongo shell
SERVER-35585 Make PeriodicRunner jobs be pausable/resumable
SERVER-35629 Use WiredTiger salvage API for repairing metadata files
SERVER-35630 Missing or corrupt data files should cause MongoDB to exit with an error message to run repair
SERVER-35696 Provide a way to restore idents known by WiredTiger, but unknown to the _mdb_catalog
SERVER-35731 Prevent a repaired node from re-joining a replica set
SERVER-35782 Repair should move aside unsalvageable data files and create empty ones in their place
SERVER-35784 Fix ambiguously named test fixture in commands_test.cpp
SERVER-35800 resmoke.py should retry getting a build_id and test_id from logkeeper
SERVER-35985 sessions_test and sharding_catalog_manager_test don’t destroy all Clients before destroying the ServiceContext
SERVER-36019 Create script to collect resource utilization of Android application
SERVER-36069 Vendor mongoebench-compatible JSON config files from mongodb/mongo-perf into src/third_party
SERVER-36076 Create new resmoke.py test suite for running mongoebench on a desktop
SERVER-36077 Create new resmoke.py test suite for running mongoebench on an Android device
SERVER-36078 Integrate adb resource monitor into mongoebench test suite for Android
SERVER-36084 Remove sharding runtime from embedded
SERVER-36162 Powercycle - ensure internal crash command has been executed on the remote host
SERVER-36169 Resmoke: bare raise outside except in the stepdown hook
SERVER-36258 Perform construction of ServiceContext after execution of mongo initializers, not during
SERVER-36347 Make parse_zone_info.js handle new error message from ServiceContext refactor
SERVER-36351 ServiceContextMongoDTest doesn’t persist TempDir correctly
SERVER-36474 Cannot initiate a replica set if free monitoring is disabled at command-line
SERVER-36621 A call to log() in capi_test.cpp does not print to stdout
SERVER-36691 Only recover orphaned collection idents when starting with repair, not after an unclean shutdown
SERVER-36702 SCons to be able to install binaries as darwin framework
SERVER-36703 SCons to be able to link against darwin frameworks
SERVER-36704 Embedded to support logical sessions the same way as standalone mongod
SERVER-36722 Add remote maven repository for embedded AAR/JAR
SERVER-36725 periodic_runner_impl_test should manually call tearDown
SERVER-36732 Wait for all secondaries to be up and electable in election handoff jstests
SERVER-36747 Add a small time delay to “jstests/ssl/ssl_client_certificate_warning_suppression.js”
SERVER-36749 Remove race in Service Executor Adaptive shutdown
SERVER-36757 Generate and extract mongoebench-compatible JSON config files to consistent locations
SERVER-36761 Add requires_replication tag to disk/repair_invalidates_replica_set_config.js
SERVER-36768 Orphaned collection recovery should allow recovered collections to be renamed
SERVER-36783 Run the secondary_reads_passthrough task of enterprise-rhel-62-64-bit-inmem on rhel62-large
SERVER-36836 v4.0 fsm workload “yield_group.js” should accept “InternalError” as a possible outcome of the group command
SERVER-36842 Core dump not generated after invariant failure in powercycle hosts
SERVER-36869 fsm capped collection checks should only make 1 query for assertions
SERVER-36897 OplogReader.hasNext can return false -> true, confusing checkOplogs
SERVER-36906 Connection state now allowed to be kConnectionStateUnknown
SERVER-36919 Add server setParameter tlsWithholdClientCertificate (bool)
SERVER-36942 Differentiate invalid hostname from invalid certificate
SERVER-36947 Enable test commands for perf micro benchmarks
SERVER-36980 Remove old aggregation fuzzer from evergreen
SERVER-36987 ChunkVersion::minorVersion truncates to 16 bit
SERVER-37013 mongoebench-compatible JSON config files attempt to read from views without using “find” command
SERVER-37041 Update eval blacklists on older branches to account for differences in tests across branches
SERVER-37042 Handle exceptions from cursor.next in ReplSetTest
SERVER-37071 Blacklist set7.js and max_doc_size.js from retryable_writes_jscore_stepdown_passthrough
SERVER-37127 Update baseline comparison for sys-perf
SERVER-37149 Remove deadlock in ScheduleBeforeStartupTest
SERVER-37156 benchRun should wait for the worker threads it spawns to exit
SERVER-37170 mongos fails to start with error ‘DuplicateKey SetWiredTigerCustomizationHooks’ on dynamic builds
SERVER-37216 Android Multiarch builder can’t publish to mavenLocal
SERVER-37256 Add missing index_access_methods dependency to storage_wiredtiger_recovery_unit_test
TOOLS-1989 Switch evergreen intensive testing to match server priority buildversions
TOOLS-2050 oplog_rename_test fails on Windows due to access violation error
TOOLS-2099 Tools jstests failing on replica set shutdown
WT-3735 Add a workgen workload that generates a lot of page splits
WT-3736 Add statistics to measure contention on lookaside cursor
WT-3879 Disallow checkpoint from evicting metadata pages
WT-3894 Timestamp queue implementation and statistics improvements
WT-4090 Low priority reads
WT-4104 Fix test/format failure during comparing data content with berkeley db
WT-4119 Avoid restarts updating / removing during a column store scan
WT-4131 Rename lookaside to cache overflow
WT-4144 Fix rollback_to_stable with lookaside history
WT-4154 Surface the oldest read timestamp
WT-4156 Add new wiredtiger_salvage top level API
WT-4176 Expose a WT_SESSION.query_timestamp method
WT-4177 Backup cursor open should force a log file switch
WT-4185 Don’t remove all lookaside entries when reading a page
WT-4211 Add automated test for long running prepared transactions
WT-4212 Update lookaside schema to handle prepared transactions
WT-4216 Use separate counters for page_swap yield and sleep
WT-4218 Change eviction to evict prepared updates
WT-4225 Automate a backup test that simulates volume snapshot via dd
WT-4231 Fix ctags index of functions with attributes
WT-4233 Change log corruption errors to warnings and truncate log
WT-4239 Don’t allow checkpoints to perform insert-splits in the tree
WT-4241 GNU-stack section should never be conditionally compiled out
WT-4243 Fix lookaside sweep to not remove required entries
WT-4246 Change transaction update list to support indirect references
WT-4248 Fix checkpoints in schema_abort for slow machines
WT-4249 Attempt to discard dirty page during verify operation
WT-4251 Prepared updates cannot be discarded
WT-4252 Btree debug functions can leak scratch buffers on error.
WT-4253 Btree debug function to do blind reads doesn’t handle row-store internal pages
WT-4256 Loosen check during rollback_to_stable
WT-4257 Don’t assume timestamps from lookaside are aligned in memory
WT-4259 Restore ref to the previous state rather than MEM when eviction fails
WT-4261 Test salvage of out-of-sync metadata/turtle files
WT-4262 Lock deleted children in eviction of internal pages
WT-4263 Use the right tree when copying a key for a lookaside write
WT-4264 Compaction can race with page modifications
WT-4267 fixed-length column store operations can corrupt data
WT-4268 Random abort should wait until record files exist before starting timer
WT-4270 Add an operation field to know where threads hang
WT-4272 Increase startup timeout to 30 seconds for slow I/O systems
WT-4274 Fix memory leak in wt4156_metadata_salvage test
WT-4277 Make truncate in column stores more efficient
WT-4281 Shorten runtime of Python test suite
WT-4282 Don’t transition pages from limbo to mem unless required
WT-4283 Restore WT_ERROR and use a corrupt flag
WT-4284 Print a verbose message in recovery on error too
WT-4285 Fix wt4156_metadata_salvage Coverity/lint complaints
WT-4286 Column store should skip end-of-table checks if there’s an exact match
WT-4288 Don’t let return value of closing conn overwrite WT_TRY_SALVAGE
WT-4289 Update WT_DATA_CORRUPTION to WT_TRY_SALVAGE in test_txn19.py
WT-4291 Fix test_txn19.py error detection by looking for WT_ERROR
WT-4292 Add call to testutil_cleanup to avoid memory leak
WT-4300 Setting the update timestamp can overwrite the WT_REF.addr field
WT-4301 WT_CURSOR.reserve operations can leak memory when committed
WT-4305 Add a gating variable for long running prepare support
WT-4306 Fix mode if metadata pages need eviction
WT-4308 Insert split during sync should not free blocks
WT-4321 Disable the random direct I/O test
WT-4325 Add a WiredTiger-local version of the qsort(3) call

New in MongoDB 3.6.2 (Mar 23, 2018)

Security:
SERVER-31625 The contents of {USER} needs to be escaped when querying for the groups using LDAP server
Sharding:
SERVER-28992 Cleanup mongos write commands execution
SERVER-31982 Shard does not call config commit chunk migration command with majority writeConcern nor checks for writeConcern errors.
SERVER-32202 Do not clear the cached sharding filtering information on replication state changes
SERVER-32255 UUIDs may be absent from shard secondary local collections
SERVER-32480 Remove CatalogCache retrieval methods, which take StringData
SERVER-32529 Requiring replSet for shards breaks Queryable Backup
Replication:
SERVER-30626 Remove TopologyCoordinator interface
SERVER-31267 CollectionCloner fails if collection is dropped between getMore calls
SERVER-31684 QueryPlanKilled (operation exceeded time limit) in $changeStream with updateLookup
SERVER-31749 Clarify the reason temporary unique collection names are made
SERVER-32098 Disallow operations on drop-pending collections through applyOps
SERVER-32136 initial_sync_drop_collection.js should wait for system to stablize after restarting node
SERVER-32224 Disable chaining in initial_sync_drop_collection.js
Aggregation:
SERVER-32282 Aggregation text search returns text score even if it wasn’t requested when targeting multiple shards in a sharded cluster
SERVER-32430 DocumentSourceSort sorts array documents incorrectly if there is a non-simple collation
Storage:
SERVER-29909 Libraries db/db_raii and db/s/sharding are directly cyclic
SERVER-31750 Always log renameCollections in our tests
SERVER-32242 Fix race in CompatibleFirstStress lock manager test
SERVER-32315 Remove IndexObserver
Operations:
SERVER-32396 mongo shell failed to connect with 3.6 connection string SRV
Build and Packaging:
SERVER-31875 Fix long link times on OS X by passing -no_deduplicate to the linker
SERVER-32415 MongoDB msi installer for Compass contains a typo
Internals:
SERVER-30538 check that oplogTruncateAfterPoint is correct in PeriodicKillSecondaries hook
SERVER-31972 Reduce the number of iterations for the toggle_feature_compatibility.js workload
SERVER-31997 Add additional unittesting for CompatibleFirst policy
SERVER-32091 Powercycle - remove mongod.lock file for MMAPV1 test
SERVER-32145 Avoid dropping lock before cleaning up DocumentSourceCursor’s PlanExecutor
SERVER-32246 PID file permission on v3.6 make it not not monitorable using pid file
SERVER-32497 implicitly_retry_on_database_drop_pending.js calls tojson() inside of a loop
SERVER-32500 Disable the sharding Evergreen task on the Enterprise OS X 10.10 MMAPv1 builder

New in MongoDB 3.6.1 (Mar 23, 2018)

Sharding:
SERVER-29397 Invariant failure on config server when inserting tag into config.tags
SERVER-30226 Force the recipient shard to refresh its metadata after migration commit
SERVER-30768 Primary queries using maxTimeMS cause temporary shard write unavailability if ExceededTimeLimit
SERVER-31056 Remove all usages of the default constructor of ScopedCollectionMetadata outside of MetadataManager
SERVER-31627 ShardingTest.checkUUIDsConsistentAcrossCluster can fail to see collection in config.cache.collections
SERVER-31865 setFCV on config server should only generate UUIDs for non-dropped sharded collections
SERVER-31984 A migration will simply report “Data transfer error” when we have rich error details on the destination shard that are logged but not returned to the user
SERVER-32043 Disallow users from creating new indexes in config.transactions
SERVER-32055 Improve multi thread performance for retryable writes
SERVER-32123 Enable sign range optimization for clusterTime
SERVER-32149 ShardingCatalogManager::getDatabasesForShard should check if query was successful
SERVER-32372 Mongos crashes on bulk inserts which size are slightly bigger than maxBsonObjectSize
SERVER-32385 “CommandNotFound: no such command” in mongodb logs on 3.6
Replication:
SERVER-30457 Cancel catchup takeover if primary caught up according to heartbeats
SERVER-31990 Rollback can abort on long collection names.
SERVER-32085 $changeStream reports incorrect documentKey for unsharded collections that become sharded
SERVER-32114 Delete unused rollback code
SERVER-32131 ChangeStreams lookup_post_image.js test makes assumptions that don’t hold up in secondary read passthrough
SERVER-32159 fix typo in sync_tail.cpp fillWriterVectorsAndLastestSessionRecords()
SERVER-32167 do a second majority write on oldPrimary before committed read in read_committed_after_rollback.js
SERVER-32178 Do not use IDL on oldest oplog entry
Query:
SERVER-31978 Add an invariant that DocumentSourceCloseCursor does not execute on a mongod for a sharded $changeStream
SERVER-32046 Arrays of certain NumberDecimals can trigger an invariant failure
SERVER-32109 $rename does not update value if existing “to” field has the same numeric value but different type.
SERVER-32173 Add deprecation warning to “snapshot” option on queries
Write Operations:
SERVER-8538 Deprecate $atomic/isolated update option
SERVER-32048 Updates using a numeric path component may cause index entries not to be created
Aggregation:
SERVER-31731 Test that mongos accepts a –timeZoneInfo parameter, and can correctly execute expressions using time zones
SERVER-31885 changeStream cursor is not returned on a mongos when the database does not exist.
Storage:
SERVER-31304 remove SnapshotName class
SERVER-31906 Test that applyOps can clone admin.system.version preserving its UUID
SERVER-31952 return error if collMod provides a UUID that does not match the UUID of the collection specified
SERVER-32022 allow enableMajorityReadConcern=false to work
SERVER-32118 applyOps view creation should not assign UUID
SERVER-32226 oldest_timestamp should track the last applied time, during initial sync
Operations:
SERVER-29453 Disallow removing the featureCompatibilityVersion document
Build and Packaging:
SERVER-32211 install_compass experience on OSX needs improvement
SERVER-32286 Remove Type=forking from Debian SystemD service file
Tools:
TOOLS-1895 qa-dump-restore-archiving oplog_rollover_test.js
Internals:
SERVER-30770 system_perf.yml: Use new DSI interface and cleanup
SERVER-31194 Add a version of retryable_writes_jscore_passthrough.yml with stepdowns
SERVER-31225 The mongod process forks before listening for connections
SERVER-31660 Bring BSONObj parsers back for IDL generated commands
SERVER-31791 UUIDs should be added to local collections for replica sets only on clean startup
SERVER-31808 HostAndPort for replSetInitiate() no longer finds hostname for localhost
SERVER-31845 WT performance regression with write retryability enabled
SERVER-31864 applyOps command with UUID containing op must require granular privileges
SERVER-32053 explain3.js should assert that its writes succeed
SERVER-32073 Improve signal given by list_local_sessions.js
SERVER-32087 Run test stage of sys-perf and mongo-perf failures should lead to red evergreen boxes
SERVER-32105 Require shard servers and config servers to be started with –replSet or ‘replSetName’
SERVER-32106 Migration of txn oplog entries can trigger fassert in secondary replication
SERVER-32164 Shell SRV implementation does not allow authSource from TXT records to be used
SERVER-32238 Revert erroneous high error codes
TOOLS-1688 Evergreen tests broken in master
TOOLS-1827 Implement Initial DNS Seedlist discovery spec
TOOLS-1861 build.sh script doesn’t abort on error
TOOLS-1878 qa-tests-unstable force_table_scan.js
TOOLS-1880 qa-tests-unstable no_primary_error_code.js
TOOLS-1881 qa-tests-unstable no_sharded_secondary_reads.js
WT-3079 Make sure eviction visits all trees
WT-3776 Cursor remove operation unpins page too early
WT-3786 Transactions with timestamps should read their writes

New in MongoDB 3.4.14 (Mar 23, 2018)

New in MongoDB 3.4.13 (Mar 23, 2018)

New in MongoDB 3.4.12 (Mar 23, 2018)

New in MongoDB 3.4.11 (Mar 23, 2018)

New in MongoDB 3.4.10 (Mar 23, 2018)

New in MongoDB 3.4.9 (Sep 12, 2017)

Sharding:
SERVER-20392 Sharding an existing small collection results in large number of chunks
SERVER-30183 a moveChunk that joins the active moveChunk on a shard may not respect its waitForDelete
SERVER-30487 RangeDeleter holds WT transaction open while waiting for majority
SERVER-30636 RangeDeleter assert failed because of replication lag
Replication:
SERVER-28277 Need to increase timeout in read_committed_with_catalog_changes.js
SERVER-29802 Non-atomic applyOps command should not take out a global exclusive lock
SERVER-30554 relax locking mode in applyOps when applying CRUD-only ops non-atomically
Query:
SERVER-30189 Reduce calls to allocator for large $in expressions
Write Operations
SERVER-27317 Inserting a document with a Decimal128 value when featureCompatibilityVersion is 3.2 results in a closed socket
JavaScript:
SERVER-30875 Add support for a “no-owned bson” mode for JS Scopes
SERVER-30971 Use of “scope” field in mapReduce triggers BSONObj ownership error
Storage:
SERVER-26239 Improve handling of WT_CACHE_FULL for inMemory storage engine
SERVER-30490 Compile RocksDB with USE_RTTI=1
SERVER-30790 ServerStatus on WiredTiger accesses the storage engine without any locks
Build and Packaging:
SERVER-29686 Remove /var/lib/mongodb from mongodb-org[-unstable] deb metapackage
SERVER-30562 avoid running many duplicate ARM64 tests for the community build
Internals:
SERVER-26377 Skip running FSM workloads that use the compact command on the LSM build variant
SERVER-26824 Skip FSM workloads which rely on nUpserted or nRemoved when Balancer is enabled
SERVER-28824 Unhandled hang analyzer exception escapes loop to get threads from each process
SERVER-29431 initialsync.js does not verify that initial sync succeeds
SERVER-29714 Add Exception Message to Validate_Locale.cpp
SERVER-30509 Update Evergreen API URL in burn_in_tests.py
SERVER-30643 Performance regression with SSL
WT-3329 With a uniform workload and a number of small collections, eviction does a poor job of selecting candidates for eviction.
WT-3438 Don’t tune eviction thread count when the count is fixed
WT-3499 Checkpoint can miss not yet committed item

New in MongoDB 3.5.12 Dev (Sep 8, 2017)

New Feature: SERVER-1243: New operator to update all matching items in an array
New Feature: SERVER-831: Positional Operator Matching Nested Arrays
Bug: SERVER-25059: URL support needs to support percent-encoding (escape sequences)
New Feature: SERVER-27089: Extend the update subsystem to support more expressive updates to array fields
Task: SERVER-30503: Redesign Moose storage structure
New Feature: SERVER-30564: Run embedded CAPI and transport layer tests in iOS simulator on evergreen
Bug: SERVER-30502: --disableJavaScriptJIT does not disable JIT
Bug: SERVER-20392: Sharding an existing small collection results in large number of chunks
Task: SERVER-29096: Set readPreference to secondary in causally_consistent_jscore_passthrough suite
Task: SERVER-29140: Return 'invalidate' entries and close the cursor on relevant drop, dropDatabase, and renameCollection oplog entries
Task: SERVER-29131: Support resumeAfter option to $changeNotication to control where to start returning notifications from, which always errors if no entry with the given resumeToken exists
Task: SERVER-29144: Filter out notifications from oplogEntries with 'fromMigrate":true
Task: SERVER-29203: Implement the SessionsCollection for sharded clusters
Task: SERVER-29202: Implement the SessionsCollection for replica sets
Task: SERVER-28964: Ensure OP_MSG handlers abandon connections in error cases required by the spec
Task: SERVER-28772: Create PushNode/PushAllNode
Task: SERVER-28793: Create primary mode unit tests for ShardServerCatalogCacheLoader once all the pieces are committed
Task: SERVER-28777: Always parse update expression as an UpdateNode tree when featureCompatibilityVersion=3.6
Bug: SERVER-28824: Unhandled hang analyzer exception escapes loop to get threads from each process
Improvement: SERVER-28648: Unittests should work if 'localhost' canonicalizes to other hostname
Bug: SERVER-29337: jstests/sharding/linearizable_read_concern.js should wait for shardIdentity to replicate to all secondaries before issuing secondary reads
Improvement: SERVER-29429: Pick a sane default for maxConnecting in sharding task executor
Improvement: SERVER-29422: Respect version.json in Evergreen patch builds
Task: SERVER-29502: Require the vote from the current primary in the election dry-run of catchup takeover
Task: SERVER-28510: Make Ingress and Egress networking layer support fire and forget over OP_MSG
Task: SERVER-28301: Add stats about the session record cache to the serverStatus command
New Feature: SERVER-28335: Implement the refreshSessions command
New Feature: SERVER-28338: Implement the killSessions command
Task: SERVER-28388: Improve lifetime handling of diagnosticMessage from LDAP operations
Improvement: SERVER-13061: Raise write batch limit to 100,000 ops and prevent oversized errors
Task: SERVER-13362: Need better messaging in BSONElement::chk() errors
Improvement: SERVER-24897: Configure Diffie-Hellman parameters for OpenSSL
Bug: SERVER-25855: Increase more timeouts in mongos_cache_invalidation.js
Improvement: SERVER-19541: Add option to resmoke.py to connect to an existing deployment
Task: SERVER-30566: Unwind SERVER-28190
Improvement: SERVER-30565: burn_in_tests.py shouldn't cause compile task to fail
Task: SERVER-30562: avoid running many duplicate ARM64 tests for the community build
Improvement: SERVER-30560: Support IDL serialization to OpMsgRequest document sequences
Improvement: SERVER-30558: Remove Solaris builds from master
Task: SERVER-30555: Roll Back to Checkpoint: drop the local.replset.checkpointTimestamp collection when we shut down in fCV 3.4
Improvement: SERVER-30554: relax locking mode in applyOps when applying CRUD-only ops non-atomically
Task: SERVER-30549: Ignore shardVersion on shard secondaries until 3.6 feature compatibility version is set
Bug: SERVER-30601: Coverity analysis defect 101964: PW.USELESS_TYPE_QUALIFIER_ON_RETURN_TYPE
Bug: SERVER-30589: Don't add stable timestamp candidates when in master slave mode
Bug: SERVER-30584: Sessions collection should not send refresh if there are no records
Bug: SERVER-30571: EphemeralForTest oplogStartHack segfaults if startingPosition is behind oplog
Task: SERVER-30593: Add 'available' as a valid read concern level
Task: SERVER-30588: Support binding all IPs associated with a hostname
Task: SERVER-30580: Unify implementations of Status and DBException
Bug: SERVER-30570: Coverity analysis defect 101918: PW.PARAMETER_HIDDEN
Bug: SERVER-30569: Coverity analysis defect 101928: Arguments in wrong order
Bug: SERVER-30574: remote_operations.py fails to handle ssh_options, quoting in operations and Windows files
Task: SERVER-30541: Roll Back to Checkpoint: Remove "rollback " log message prefixes
Improvement: SERVER-30536: disallow applyOps non-atomic mode when preCondition flag is used
Improvement: SERVER-30535: Consistent names for ServiceExecutorAdaptive metrics
Task: SERVER-30534: Create a _configsvrDropCollection command
Bug: SERVER-30528: createIndexes should ignore NamespaceNotFound uasserts during InitialSync
Task: SERVER-30743: Remove shell functions used for now obsoleted db.upgradeCheck()
Bug: SERVER-30720: Integer overflow in SharedBuffer::grow_reallocate
Task: SERVER-30521: in syncApply, throw NamespaceNotFound rather than returning a status on missing database
Improvement: SERVER-30520: SecureRandom::create() should return a unique_ptr
Bug: SERVER-30524: dateFromParts expects "milliseconds" instead of "millisecond"
Task: SERVER-30516: Reduce concurrency for Windows compile_all builds to avoid OOM failures
Task: SERVER-30512: Ensure all changeStreams field names match the spec
Task: SERVER-30509: Update Evergreen API URL in burn_in_tests.py
Task: SERVER-30506: Rename $changeNotification to $changeStreams
Improvement: SERVER-30507: Python git module should not use the '--work-tree' option
Task: SERVER-30501: Create rollback logging component
Bug: SERVER-30499: Only update sessions with a transaction number
Bug: SERVER-30500: don't assign UUIDs to system.indexes on collMod/upgrade
Bug: SERVER-30495: Remove erroneous percent sign in test lifecycle update JIRA issues
Bug: SERVER-30625: Reconnect node after calling waitForState shell helper in case the state transition closes connections
Bug: SERVER-30616: fix race in AbstractOplogFetcherTest::OplogFetcherReturnsOperationFailedIfExecutorFailsToScheduleFind
Improvement: SERVER-30619: Update Evergreen API URL in buildscripts/test_failures.py
Task: SERVER-30604: Mount EC2 instance drive for /data
Bug: SERVER-30627: Avoid network errors in restartServerReplication() in catchup takeover JS tests.
Bug: SERVER-30614: missing_key.js should check its inserts and commands
Bug: SERVER-30673: get last error command should be marked doesn't requireAuth
Improvement: SERVER-30670: Add clusterType TestData to generational fuzzer yml tests.
Improvement: SERVER-30651: Parallelize calls to the Evergreen API in update_test_lifecycle.py
Bug: SERVER-30703: make _configsvrShardCollection return the newly sharded collection's UUID
Bug: SERVER-30698: make the distinct command deterministically versioned on mongos for sharded collections
Bug: SERVER-30661: Build with --wiredtiger=off fails on master branch
Task: SERVER-30658: Add DBLevelLocking check to storage engine API
Improvement: SERVER-30646: Fix dbCheck health log entries
Bug: SERVER-30712: ClusterAggregate::aggPassthrough() should pass RetryPolicy::kIdempotent to handle transient network/failover errors
Task: SERVER-30706: Create specializations of AtomicWord that are lock-free for eligible user define dtypes
Bug: SERVER-30688: Using multiple changeStream cursors causes a segfault
Task: SERVER-30702: Stop printing stack traces in masserts
Bug: SERVER-30665: applyOps collMod handling should only allow nonexistent UUIDs for UUID upgrade collMods
Improvement: SERVER-30654: Add retry mechanism for failed API calls in test_failures module
Bug: SERVER-30648: Set GlobalLockAcquisitionTracker after we waitForLock
Bug: SERVER-30490: Compile RocksDB with USE_RTTI=1
Improvement: SERVER-30480: Update aggregation explain format to provide details of merge location
Task: SERVER-30479: Make async builder run daily
Bug: SERVER-30473: Denial of service from wild
Bug: SERVER-30362: JavaScript DBCollection.toString() stops working
Task: SERVER-30328: Have WT encryption at rest allow multiple wiredtiger_open/close calls in a single mongod process lifetime.
Bug: SERVER-30295: Connect FCV to WiredTiger compatibility version
Bug: SERVER-30234: Create embedded CAPI tests for CRUD operations
Improvement: SERVER-30230: Detailed error message when mongod fails to start to because systemLog.path points to a directory
Improvement: SERVER-30351: Add a traverseRecordStore() function in the RecordStoreValidateAdaptor
Task: SERVER-30319: When requesting only 1 thread for initial sync, use the 'find' command instead of 'parallelCollectionScan'
Improvement: SERVER-30302: Add explicit configuration object for UpdateSequenceGenerator
Task: SERVER-30335: Roll Back to Checkpoint: Call setInitialDataTimestamp at startup
Improvement: SERVER-30301: Add explicit configuration object for DocumentStructureEnumerator
Improvement: SERVER-30378: Add asynchronous writing facility
Improvement: SERVER-30379: Add health log
Improvement: SERVER-30353: Create an index observer to notify us of changes made to index and document keys
Improvement: SERVER-30352: Add a new class that will keep track of the index inconsistencies during validation
New Feature: SERVER-30327: Introduce ScalarGenerator interface for creating values of different BSON types in idempotency testing
Task: SERVER-30324: Move logic of removeShard to _configsvrRemoveShard
Task: SERVER-30310: Have WiredTigerKVEngine implement StorageEngine::setStableTimestamp/setInitialDataTimestamp
Task: SERVER-30081: Add a WiredTigerKVEngine "recovery" method that reconciles the _mdb_catalog and WT tables.
Task: SERVER-30046: Add support for $expr constant expressions to ComparisonMatchExpression
Bug: SERVER-29990: OP_MSG with duplicate field '$logicalTime'
Bug: SERVER-30057: Remove $logicalTime from core/set_param1.js test
Bug: SERVER-30040: ServiceStateMachine should redact exceptions before logging
Task: SERVER-30034: Create a $_internalSchemaMatchArrayElement MatchExpression
Task: SERVER-30076: Use the UUID of the config.transactions collection for rollback via refetch
Task: SERVER-29987: Make all non-write operations take readConcern
Bug: SERVER-30269: Bump ASIO to capture bug fixes
Improvement: SERVER-30265: Abstract enabling virtualenv in etc/evergreen.yml
Bug: SERVER-30266: ShardServerCatalogCacheLoader may drop collections causing failures in test validation
Task: SERVER-30281: Properly clear in-memory transaction table state after rollback
Bug: SERVER-30289: Ensure parallel shell in change_notification.js has started before running getMore it will wait for
Improvement: SERVER-30254: Make ThreadPool::join finish remaining tasks on a pristine thread instead of inline
Bug: SERVER-30183: a moveChunk that joins the active moveChunk on a shard may not respect its waitForDelete
Improvement: SERVER-30189: Reduce calls to allocator for large $in expressions
Task: SERVER-30175: Extend the JSON Schema parser to handle restriction keywords for scalars
Task: SERVER-29939: Update sequence generation for testing oplog idempotency
Task: SERVER-29944: Implement a basic idempotency checker for testing oplog idempotency
Bug: SERVER-29915: SCRAM-SHA-1 mechanism should respect "y" in gs2-cbind-flag
Task: SERVER-29893: Roll Back to Checkpoint: Rename recovery code and make it accessible to both startup and rollback
Task: SERVER-29898: Roll Back to Checkpoint: Call recoverToStableTimestamp() under the global X lock
Task: SERVER-29897: Roll Back to Checkpoint: Increment the rollback ID
Task: SERVER-29894: Roll Back to Checkpoint: Start oplog application during recovery at checkpoint timestamp
Task: SERVER-29891: Roll Back to Checkpoint: Call setStableTimestamp() when commit point or last applied changes
Task: SERVER-29896: Roll Back to Checkpoint: Write the common point to the oplog truncate after point
Improvement: SERVER-29802: Non-atomic applyOps command should not take out a global exclusive lock
Task: SERVER-29797: Capability to invoke Hang_analyzer on a remote host
Bug: SERVER-29768: Primary does not need to do a complete chunk metadata read in ShardServerCatalogCacheLoader
Improvement: SERVER-29743: IDL should generate a default constructor
Task: SERVER-29756: Unit tests for OpMsg parsing and serialization
Improvement: SERVER-30468: Speed up checking for duplicate error codes
Bug: SERVER-30380: $lookup 'let' variables should be available to all nested sub-pipelines
Bug: SERVER-30467: Extend $_internalSchemaMinLength and $_internalSchemaMaxLength to count lengths of Unicode strings
Task: SERVER-30437: Stop the shard chunk loader from scheduling persistence tasks with mixed version chunks
Bug: SERVER-30424: Coverity analysis defect 101903: Dereference before null check
Task: SERVER-30443: Create PeriodicBalancerSettingsRefresher on the ServiceContext
Task: SERVER-30432: add logicalSessionTimeoutMinutes to isMaster results
Task: SERVER-30407: Make findAndModify retryable
Bug: SERVER-30445: A non-full validation should also return the number of invalid documents/objects
Bug: SERVER-30418: continuous stepdown override should catch the ManualInterventionRequired error code for mapReduce in addition to shardCollection
Improvement: SERVER-30401: Simplify UpdateLeafNode::apply interface
Bug: SERVER-30394: ftdc file_manager generates an incorrect absolute diagnostic data path for mongos if the logpath is a relative path
Improvement: SERVER-29672: Move the CatalogCacheLoader out of the CatalogCache and make it an independent component
Bug: SERVER-29694: Read-only shards should not try to persist the collection routing information locally
Bug: SERVER-29686: Remove /var/lib/mongodb from mongodb-org[-unstable] deb metapackage
Task: SERVER-29667: Fix document refetch step in UUID enabled rollback
Bug: SERVER-29641: checkReplicatedDataHashes() throws a TypeError when replSetTest uses mongobridge
Improvement: SERVER-29670: Create a server parameter for specifying the level of CollectionCloner parallelization
Task: SERVER-29637: make shards obtain UUID for sharded collections from config server on setFeatureCompatibilityVersion: 3.6
Task: SERVER-30147: Add collection task queue flush functionality to ShardServerCatalogCacheLoader and replace certain uses of waitForCollectionVersion
Task: SERVER-30146: Evergreen scripts for remote hosts: ssh & scp
Task: SERVER-30122: Evergreen functions to spawn and terminate EC2 instances
Task: SERVER-29586: Create a $_internalSchemaAllElemMatchFromIndex MatchExpression
Improvement: SERVER-29617: Use the AsyncResultsMerger to copy documents in CollectionCloner instead of Fetcher
Improvement: SERVER-29524: sys-perf: Call infrastructure_provisioning.py instead of infrastructure_provisioning.sh
Task: SERVER-29593: Integrate the official JSON Schema test corpus into the unit tests
Improvement: SERVER-22760: Sharded aggregation pipelines which involve taking a simple union should merge on mongos
Bug: SERVER-27738: Positional operator ($) can choose wrong array element when there is a numerical path component
Bug: SERVER-27411: session cache concurrency issues at shutdown
Bug: SERVER-27826: Increase the timeout SSLTest.prototype.connectWorked from 30 to 600 seconds.
New Feature: SERVER-20782: Support causal consistency with secondary reads in sharded, replicated MongoDB clusters
Bug: SERVER-22829: WiredTiger data files world-readable
Improvement: SERVER-24550: Error out when db.createUser() is used with wrong syntax
Bug: SERVER-30531: nonexistent tests blacklisted
Bug: SERVER-30630: Remote hang_analyzer invoked during timeout phase even when the task doesn't have remote processes
Improvement: SERVER-30350: Move the RecordStoreValidateAdaptor into its own file from CollectionImpl
Improvement: SERVER-30299: MSVC outputs warning 'Call to 'std::copy' with parameters that may be unsafe' in unordered_fast_key_table.h
Improvement: SERVER-29974: Comment in checkAuthForRenameCollectionCommand doesn't match behavior
Improvement: SERVER-30453: Remove the record_store_validate_adaptor library and move its source into the catalog library
Bug: SERVER-30529: serviceExecutorTaskStats totaltimeExecutingMicros should be totalTimeExecutingMicros
Bug: SERVER-30527: serviceExecutorTaskStats tasksExecutng should be tasksExecuting
Task: SERVER-30721: Remove uses of CIDRException in favor of uassert()

New in MongoDB 3.4.7 (Sep 8, 2017)

New in MongoDB 3.2.10 (Oct 7, 2016)

New in MongoDB 3.2.9 (Aug 17, 2016)

New in MongoDB 3.2.8 (Aug 17, 2016)

New in MongoDB 3.2.7 (Jun 28, 2016)

New in MongoDB 3.2.6 (Jun 28, 2016)

New in MongoDB 3.2.5 (Jun 28, 2016)

New in MongoDB 3.2.4 (Mar 11, 2016)

New in MongoDB 3.2.3 (Feb 18, 2016)

New in MongoDB 3.2.1 (Feb 18, 2016)

Highlights:
Fixed error where during a regular shutdown of a replica set, secondaries may mark certain replicated but yet to be applied operations as successfully applied: SERVER-21868.
Improve insert workload performance with WiredTiger on Windows: SERVER-20262.
Fixed long-running transactions during chunk moves: SERVER-21366
Fixed issues:
Task TOOLS-1025: Update tests to conform to ReplSetTest changes
Task TOOLS-1021: Change mongo-tools evergreen config to use MongoDB 3.2 for master branch tests
Bug TOOLS-1013: stat_discover.js test is flaky (again)
Bug TOOLS-1002: oplog_rollover test is flaky
Bug TOOLS-982: Missing "from" text in mongorestore status message
Improvement TOOLS-954: Add bypassDocumentValidation option to mongorestore and mongoimport
Bug TOOLS-944: write concern mongos tests are flaky
Task SERVER-22009: Turn on regression tracking for DSI tests on 3.2
Task SERVER-22008: Turn on regression tracking for performance projects on 3.2
Bug SERVER-21999: sys-perf: fix issue with EVG log file name
Bug SERVER-21996: Increase stability of autodiscover_config_rs_from_secondary.js test
Bug SERVER-21971: Not possible to elect a primary if non-voting member is ahead (PV0)
Bug SERVER-21961: Get rid of the annoying error message in post-step for perf.yml & system_perf.yml
Bug SERVER-21955: CleanEveryN hook isn't compatible with MasterSlaveFixture
Improvement SERVER-21950: Run concurrency suite on compile variants for DEBUG builds
Bug SERVER-21930: Restart oplog query if oplog entries are not monotonically increasing
Bug SERVER-21923: ReplSetTest.awaitSecondaryNodes does not propagate supplied timeout
Bug SERVER-21920: Use enhanced WiredTiger next_random cursors for oplog stones
Bug SERVER-21901: CheckReplDBHash checks the wrong node when dumping docs from missing collections
Task SERVER-21893: JS tests that use dbHash incorrectly check number of collections
Bug SERVER-21891: perf.yml dependency check misconfigured for misc-wt-mmap-repl-comp
New Feature SERVER-21890: Create a flag to allow server realm to be specified explicitly on Windows
Bug SERVER-21885: capped_truncate.js cannot be run with --repeat
Improvement SERVER-21872: WiredTiger changes for 3.2.1
Bug SERVER-21871: Do not run min_optime_recovery.js on ephemeralForTest storageEngine
Bug SERVER-21870: Missing space in error message
Bug SERVER-21868: Shutdown may not be handled correctly on secondary nodes
Bug SERVER-21867: WiredTiger oplog cursor can return repeated segments
Bug SERVER-21864: streamline artifact signing procedure to support coherent release process
Bug SERVER-21852: kill_cursors.js fails in small_oplog* configurations
Bug SERVER-21849: Fix timestamp compare in min_optime_recovery.js
Bug SERVER-21848: bulk write operations on config/admin triggers invariant failure
Improvement SERVER-21847: log range of operations read from sync source during replication
Bug SERVER-21835: Prevent CappedPositionLost workload failures with indexed_insert_base_capped.js
Task SERVER-21824: Disable kmip.js test in ESE suite; re-enable once fixed
Bug SERVER-21796: fix startup_log.js test to handle git describe versioning
Bug SERVER-21795: Do not reschedule more than one liveness timeout callback at a time
New Feature SERVER-21793: create v3.2 branch and update evergreen configuration
Bug SERVER-21792: Performance regression with directio enabled on Windows with WiredTiger
Task SERVER-21786: Fix code coverage gaps in s/query directory exposed by code coverage tool
Bug SERVER-21781: Nightly packages are in the wrong repo directories
Bug SERVER-21772: findAndModify not captured by Profiler
Task SERVER-21768: Remove the 'numCollections' field from dbHash's response
Task SERVER-21763: Track "compare" task for performance results as regular regression tasks.
Bug SERVER-21752: slow2_wt fails by exhausting host machine's memory
Bug SERVER-21750: getMore command does not set "nreturned" operation counter
Task SERVER-21737: remove deprecated release process configuration from master branch evergreen configuration
Task SERVER-21725: Enable the analysis script move
Bug SERVER-21724: Backup role can't read system.profile
Improvement SERVER-21719: Add initiateTimeout rsOption for ShardingTest
Improvement SERVER-21714: Increase replSetTest.initiate() timeout for FSM tests
Bug SERVER-21706: Certain parameters to mapReduce trigger segmentation fault in a sharded cluster
Bug SERVER-21704: JS Test single_node_config_server_smoke has race condition
Bug SERVER-21667: do not set lastop on clients used by replication on secondaries
Task SERVER-21665: Suppress tar output in jstestfuzz tasks
Task SERVER-21638: Audit and improve logging in new find/getMore commands code
Task SERVER-21637: Add mixed version tests for find/getMore commands
Task SERVER-21602: Reduce execution time of cursor_timeout.js
Task SERVER-21600: Increase test coverage for killCursors command and OP_KILLCURSORS
Task SERVER-21586: Investigate v3.0 mongos and v3.2 cluster compatibility issues in jstests/sharding
Bug SERVER-21545: collMod and invalid parameter triggers fassert on dropCollection on mmapv1
Bug SERVER-21536: Invariant failure in executor/connection_pool.cpp
Task SERVER-21516: Remove dbStats command from readConcern testing override
Task SERVER-21500: Include the name of the FSM workload in the WorkloadFailure description
Improvement SERVER-21450: Modify MongoRunner to add enableMajorityReadConcern flag based on jsTestOptions
Improvement SERVER-21426: Add writeConcern support to benchRun
Improvement SERVER-21384: Expand testing for in memory storage engines
Improvement SERVER-21248: jstests for fast-failover correctness
Task SERVER-21214: Dump config server data when the sharded concurrency suites fail
Task SERVER-21164: Change assert to throw in rslib.js's wait loop
Task SERVER-21139: Add more basic tests for drop collection
Task SERVER-21138: Add more basic tests for dropDatabase
Task SERVER-21137: Add more basic tests for movePrimary
Task SERVER-21136: Add more basic tests for enableSharding
Task SERVER-21135: Add more basic tests for sharded implicit database creation
Task SERVER-21134: Add more basic tests for shardCollection
Task SERVER-21133: Add more basic test for mergeChunk
Task SERVER-21132: Add more basic tests for moveChunk
Task SERVER-21076: Write tests to ensure that operations using DBDirectClient handle shard versioning properly
Task SERVER-20824: Test for sharding state recovery

New in MongoDB 3.2.0 (Feb 18, 2016)

New in MongoDB 3.0.6 (Oct 6, 2015)

New in MongoDB 3.0.5 (Oct 6, 2015)

New in MongoDB 3.0.4 (Oct 6, 2015)

New in MongoDB 3.0.3 (May 23, 2015)

New in MongoDB 3.0.2 (May 23, 2015)

New in MongoDB 3.0.1 (Mar 18, 2015)

New in MongoDB 3.0.0 (Mar 10, 2015)

Key features include support for the WiredTiger storage engine, pluggable storage engine API, SCRAM-SHA-1 authentication mechanism, and improved explain functionality.
MongoDB Ops Manager, which includes Automation, Backup, and Monitoring, is now also available. See the Ops Manager documentation and the Ops Manager release notes for more information.
Major Changes:
Pluggable Storage Engine API - MongoDB 3.0 introduces a pluggable storage engine API that allows third parties to develop storage engines for MongoDB.
WiredTiger - MongoDB 3.0 introduces support for the WiredTiger storage engine. With the support for WiredTiger, MongoDB now supports two storage engines:
MMAPv1, the storage engine available in previous versions of MongoDB and the default storage engine for MongoDB 3.0, and
WiredTiger, available only in the 64-bit versions of MongoDB 3.0.
WiredTiger Usage:
WiredTiger is an alternate to the default MMAPv1 storage engine. WiredTiger supports all MongoDB features, including operations that report on server, database, and collection statistics. Switching to WiredTiger, however, requires a change to the on-disk storage format. For instructions on changing the storage engine to WiredTiger, see the appropriate sections in the Upgrade MongoDB to 3.0 documentation.
MongoDB 3.0 replica sets and sharded clusters can have members with different storage engines; however, performance can vary according to workload. For details, see the appropriate sections in the Upgrade MongoDB to 3.0 documentation.
The WiredTiger storage engine requires the latest official MongoDB drivers. For more information, see WiredTiger and Driver Version Compatibility.
WiredTiger Configuration:
To configure the behavior and properties of the WiredTiger storage engine, see storage.wiredTiger configuration options. You can set WiredTiger options on the command line.
WiredTiger Concurrency and Compression:
The 3.0 WiredTiger storage engine provides document-level locking and compression.
By default, WiredTiger compresses collection data using the snappy compression library. WiredTiger uses prefix compression on all indexes by default.
MMAPv1 Improvements:
MMAPv1 Concurrency Improvement - In version 3.0, the MMAPv1 storage engine adds support for collection-level locking.
MMAPv1 Configuration Changes - To support multiple storage engines, some configuration settings for MMAPv1 have changed. See Configuration File Options Changes.
MMAPv1 Record Allocation Behavior Changes - MongoDB 3.0 no longer implements dynamic record allocation and deprecates paddingFactor. The default allocation strategy for collections in instances that use MMAPv1 is power of 2 allocation, which has been improved to better handle large document sizes. In 3.0, the usePowerOf2Sizes flag is ignored, so the power of 2 strategy is used for all collections that do not have noPadding flag set.
For collections with workloads that consist only of inserts or in-place updates (such as incrementing counters), you can disable the power of 2 strategy. To disable the power of 2 strategy for a collection, use the collMod command with the noPadding flag or the db.createCollection() method with the noPadding option.
Warning:
Do not set noPadding if the workload includes removes or any updates that may cause documents to grow. For more information, see No Padding Allocation Strategy.
When low on disk space, MongoDB 3.0 no longer errors on all writes but only when the required disk allocation fails. As such, MongoDB now allows in-place updates and removes when low on disk space.
Replica Sets:
Increased Number of Replica Set Members - In MongoDB 3.0, replica sets can have up to 50 members. [1] The following drivers support the larger replica sets:
C# (.NET) Driver 1.10
Java Driver 2.13
Python Driver (PyMongo) 3.0+
Ruby Driver 2.0+
Node.JS Driver 2.0+
Because the C, C++, Perl, PHP, and earlier versions of the Ruby, Python, and Node.JS drivers discover and monitor replica set members serially, these drivers are not suitable for use with large replica sets.
Pymongo 3.0, the Ruby Driver 2.0, and the Node.JS Driver 2.0 are currently in development.
The maximum number of voting members remains at 7.
Replica Set Step Down Behavior Changes:
The process that a primary member of a replica set uses to step down has the following changes:
Before stepping down, replSetStepDown will attempt to terminate long running user operations that would block the primary from stepping down, such as an index build, a write operation or a map-reduce job.
To help prevent rollbacks, the replSetStepDown will wait for an electable secondary to catch up to the state of the primary before stepping down. Previously, a primary would wait for a secondary to catch up to within 10 seconds of the primary (i.e. a secondary with a replication lag of 10 seconds or less) before stepping down.
replSetStepDown now allows users to specify a secondaryCatchUpPeriodSecs parameter to specify how long the primary should wait for a secondary to catch up before stepping down.
Other Replica Set Operational Changes:
Initial sync builds indexes more efficiently for each collection and applies oplog entries in batches using threads.
Definition of w: “majority” write concern changed to mean majority of voting nodes.
Stronger restrictions on Replica Set Configuration. For details, see Replica Set Configuration Validation.
For pre-existing collections on secondary members, MongoDB 3.0 no longer automatically builds missing _id indexes.
Sharded Clusters:
MongoDB 3.0 provides the following enhancements to sharded clusters:
Adds a new sh.removeTagRange() helper to improve management of sharded collections with tags. The new sh.removeTagRange() method acts as a complement to sh.addTagRange().
Provides a more predictable read preference behavior. mongos instances no longer pin connections to members of replica sets when performing read operations. Instead, mongos reevaluates read preferences for every operation to provide a more predictable read preference behavior when read preferences change.
Provides a new writeConcern setting to configure the write concern of chunk migration operations. You can configure the writeConcern setting for the balancer as well as for moveChunk and cleanupOrphaned commands.
Improves visibility of balancer operations. sh.status() includes information about the state of the balancer. See sh.status() for details.
Security Improvements:
MongoDB 3.0 includes the following security enhancements:
Adds a new SCRAM-SHA-1 challenge-response user authentication mechanism.
Increases restrictions when using the Localhost Exception to access MongoDB. For details, see Localhost Exception Changed.
Security Changes:
Improvements:
New Query Introspection System - MongoDB 3.0 includes a new query introspection system that provides an improved output format and a finer-grained introspection into both query plan and query execution.
For details, see the new db.collection.explain() method and the new explain command as well as the updated cursor.explain() method.
For information on the format of the new output, see Explain Results.
Enhanced Logging - To improve usability of the log messages for diagnosis, MongoDB categorizes some log messages under specific components, or operations, and provides the ability to set the verbosity level for these components. For information, see Log Messages.
MongoDB Tools Enhancements - All MongoDB tools are now written in Go and maintained as a separate project.
New options for parallelized mongodump and mongorestore. You can control the number of collections that mongorestore will restore at a time with the --numParallelCollections option.
New options -excludeCollection and --excludeCollectionsWithPrefix for mongodump to exclude collections.
mongorestore can now accept BSON data input from standard input in addition to reading BSON data from file.
mongostat and mongotop can now return output in JSON format with the --json option.
Added configurable write concern to mongoimport, mongorestore, and mongofiles. Use the --writeConcern option.
mongofiles now allows you to configure the GridFS prefix with the --prefix option so that you can use custom namespaces and store multiple GridFS namespaces in a single database.
MongoDB Tools Changes:
Indexes - Background index builds will no longer automatically interrupt if dropDatabase, drop, dropIndexes operations occur for the database or collection affected by the index builds. The dropDatabase, drop, and dropIndexes commands will still fail with the error message a background operation is currently running, as in 2.6.
If you specify multiple indexes to the createIndexes command, the command only scans the collection once, and if at least one index is to be built in the foreground, the operation will build all the specified indexes in the foreground.
For sharded collections, indexes can now cover queries that execute against the mongos if the index includes the shard key.
Indexes in Compatibility Changes in MongoDB 3.0:
Query Enhancements - MongoDB 3.0 includes the following query enhancements:
For geospatial queries, adds support for “big” polygons for $geoIntersects and $geoWithin queries. “Big” polygons are single-ringed GeoJSON polygons with areas greater than that of a single hemisphere. See $geometry, $geoIntersects, and $geoWithin for details.
For aggregate(), adds a new $dateToString operator to facilitate converting a date to a formatted string.
Adds the $eq query operator to query for equality conditions.
2d Indexes and Geospatial Near Queries:
Distributions - Most non-Enterprise MongoDB distributions now include support for SSL. Previously, only MongoDB Enterprise distributions came with SSL support included; for non-Enterprise distributions, you had to build MongoDB locally with the --ssl flag (i.e. scons --ssl).
MongoDB Enterprise Features:
Auditing - Auditing in MongoDB Enterprise can filter on any field in the audit message, including the fields returned in the param document. This enhancement, along with the auditAuthorizationSuccess parameter, enables auditing to filter on CRUD operations. However, enabling auditAuthorizationSuccess to audit of all authorization successes degrades performance more than auditing only the authorization failures.

New in MongoDB 3.0.0 RC 6 (Jan 24, 2015)

Bug SERVER-16959: Collection::updateDocument() issues an INVALIDATION_MUTATION after performing an in-place update (MMAP v1)
New Feature SERVER-16873: Need to call commitAndRestart before stashing RUs for getMore
Bug SERVER-15691: acquiring balancer lock may fail and get stuck with concurrent write traffic
Bug SERVER-16738: WiredTiger deadlock opening multiple cursors in parallel
Bug SERVER-16763: mongod terminate due to mongo::DBTryLockTimeoutException during longevity test with wiredTiger
Bug SERVER-16867: Server crashed during iiBench run using WiredTiger engine
Bug SERVER-16908: Performance Regression in Foreground Index Builds with MMAPv1
Bug SERVER-16750: Document never matching query predicate incorrectly returned by query if concurrently updated (WiredTiger)
Bug SERVER-16574: Do not call Explain::getPlanSummary on every insert/update, or eliminate its allocating behavior
Bug SERVER-16882: Enable debug wiredtiger flags in debug mongodb build
Bug SERVER-16807: Update on invalid loc fails in concurrent circumstances
Bug SERVER-15802: Query optimizer should always use equality predicate over unique index when possible
Improvement SERVER-16604: Improve integration with rocks
Bug SERVER-16837: Migrations should time out after 10 hrs waiting for replication
Bug SERVER-16065: Long flush pauses in MMAPv1
Bug SERVER-16922: Slow index build times on secondaries with Wired Tiger
Bug SERVER-16864: ttl_repl_secondary_disabled.js
Bug SERVER-16870: Suppress indexDetails from sharded collstats in shell
Bug SERVER-16907: pause repl6.js between restarts
Bug SERVER-16904: replsets/auth1.js auth error
Bug SERVER-16172: mongod --repair terminates before repair is attempted under WiredTiger
New Feature SERVER-16663: options requested in top-level SConstruct to support non-default libraries and includes
Bug SERVER-16797: Remove support for touch command for WiredTiger
Bug SERVER-15876: Add Collection level lock checks to appropriate entry points to storage engine
Sub-task SERVER-16658: SERVER-14707 C++ driver (server fork) methods getIndexSpecs()/getCollectionInfos() should iterate returned command cursor
Bug SERVER-13863: JS engines shouldn't be linked in to mongos or tools
Bug SERVER-17030: handle WCE in index builds
Bug SERVER-16822: Map reduce doesn't use scoped transaction which results in deadlock at eviction
Bug SERVER-16795: Recovery Unit invariant tripped when calling getMore through DBDirectClient
Bug SERVER-16886: Segmentation fault when loading data into WiredTiger.
Bug SERVER-16930: remove unnecessary fatal assertion when building multiple indexes concurrently via system.indexes writes
Bug SERVER-16749: Unhandled DBException in TTLMonitor terminates server
Bug SERVER-16880: Timer overflows at approximately 9223 seconds
Bug SERVER-16946: "it" not working in the javascript shell when getting next cursor batch
Bug SERVER-16278: Race between shutdown and fsync flush with WiredTiger
Bug SERVER-16970: WiredTiger index prefix compression configuration is not applied to creationString
New Feature SERVER-16957: Permit specification of boost library suffix search preference
Bug SERVER-14707: listCollections and listIndexes commands should return a cursor
Improvement SERVER-16943: Add test for compatibility of replset background index and renameCollection
Improvement SERVER-16708: Adjust Value::compare() to reflect changes to BSON::woCompare()
Bug SERVER-16717: unexpected WriteConflict exceptions with WiredTiger b-tree
Bug SERVER-16664: Segmentation fault on insert operation with Tiger engine / zlib compressor
Sub-task SERVER-16659: SERVER-14707 Cleanup pass for CursorManager/getMore()/listCollections/listIndexes
Bug SERVER-16954: Removing objects from under a geo $near query causes invalid memory access
Improvement SERVER-16887: PlanExecutor::_root should have type scoped_ptr
Bug SERVER-16337: WriteBatchExecutor's WriteConflictException not caught
Task SERVER-16786: oplog can go back in time after rollback/startup, when node clocks are not in sync (mms-qa)
Bug SERVER-16948: printSlaveReplicationInfo() appears broken in master
Bug SERVER-16697: MongoDb terminate when WT fault STATUS_STACK_OVERFLOW
Bug SERVER-16916: RecordId might be inserted more than once with unique index and dupsAllowed == true
Bug SERVER-16913: Return connections to pool on mongos when checking config servers up locally
Bug SERVER-15744: RocksDB storage engine does not pass all tests
Bug SERVER-16961: incrementally cleanup connections in mongos_rs_shard_failure_tolerance.js
Bug SERVER-16865: created checked_cast and use in hot spots
Bug SERVER-16925: Invariant fires during shutdown on secondary node (WiredTiger)
Bug SERVER-16688: DurableImpl::commitAndStopDurThread must wait for the durability thread to exit
Improvement SERVER-16782: Modify collection stats helper to optionally suppress index details
Improvement SERVER-16437: Simple index scans should work like CountScan
Bug SERVER-16994: Handle WriteConflictException when writing oplog on secondaries
Bug SERVER-17005: skip clearing tmp collection if it fails with WriteConflictException
Task SERVER-16878: Increased information to help debug stepdown.js test failure
Bug SERVER-16514: Consistently getting "exception: collection's metadata is undergoing changes" during a drop
Bug SERVER-15322: mongosniff erroneously displays the same string for source and destination IP addresses
Bug SERVER-16773: Performance degradation due to TCMalloc scalability
Bug SERVER-16092: Modifications to admin.system.users and admin.system.roles collections must be serialized
Bug SERVER-16901: upgrade_to_ssl_nossl.js
Improvement SERVER-16982: Optimize WiredTiger index cursor's pointsToSamePlaceAs() implementation
Bug SERVER-16607: Dropping collection during active aggregation operation can crash server
Task SERVER-15614: Implement locking statistics in db.currentOp and db.serverStatus
Bug SERVER-16881: Pause due to sudden 4GB increase in cached bytes under WiredTiger
Bug SERVER-16923: Profiler collection not created when using --profile
Improvement SERVER-17002: Improve AuthenticationFailure log message for mechanism mismatch
Bug SERVER-16672: Disallow NUL bytes in index names
Bug SERVER-17003: Check command status for WriteConflictException on secondaries and retry
Bug SERVER-16919: Oplog can grow much larger than configured size under WiredTiger
Bug SERVER-16655: Geo predicate is unable to use compound 2dsphere index if it is root of $or clause
Improvement SERVER-13256: Remove pch.h
Bug SERVER-16874: Need to reset ElapsedTracker after getMore
Bug SERVER-16676: Compact with WiredTiger does not rebuild indexes
Improvement SERVER-16643: extend existing THP warning to THP defrag setting
Bug SERVER-16461: Setting socket timeouts less than 1.0 seconds leads to setting no socket timeout on Windows
Bug SERVER-16747: KeyString should overflow to heap
Bug SERVER-16902: Possible memory leak in WT b-tree with zlib block compressor
Bug SERVER-16818: Add socket timeout to isSelf replication check
Improvement SERVER-16243: Suppress mmapv1 specific stats from db.serverStatus()
Bug SERVER-16906: storage engines without directoryperdb support should fail to start up with --directoryperdb
Bug SERVER-16639: Server restart with WiredTiger on full disk causes a segfault
Bug SERVER-16863: auth_no_pri.js
Bug SERVER-16793: when running db.getSlaveReplicationInfo() on secondary it treats "self" as "master"
Improvement SERVER-16875: Add disk jstests for directoryperdb with wiredtiger
Bug SERVER-16806: After 1 hour timeout, rangeDeleter incorrectly reports "timed out after 0 seconds"
Bug SERVER-16830: hint by index name breaks with explain()
Task SERVER-16850: Remove support for touch command for RocksDB
Bug SERVER-16601: findAndModify should report that remove and update options conflict
Bug SERVER-16988: db.listCommands has a bug
Improvement SERVER-16811: Only register wiredTiger factory once
Bug SERVER-16754: Confusing severity values when mongo shell start fails
Bug SERVER-16839: collStats command in mongos needs to be updated for new fields
Bug SERVER-16848: Shell's db.collection.totalSize() returns NAN on latest
Improvement SERVER-5399: Add "quit" as a synonym for "exit" in mongo command shell
Bug SERVER-17016: db.collection.createIndex() crashes with dev null storage engine

New in MongoDB 2.8.0 RC 5 (Jan 16, 2015)

Closed issues:
Bug SERVER-16733: mongos does not fail when different configdb string is used
Sub-task SERVER-16657: SERVER-14707 Implement authorization check for getMore/killCursors on cursors owned by global cursor manager
Bug SERVER-16817: --repair fails if there are multiple collections with outdated WT index versions
Bug SERVER-15539: Invariant failure keyOffset >= 0 during 16 thread write command remove operation
Bug SERVER-16775: Steady decline in performance in capped collections under wiredTiger
Bug SERVER-16351: Erroneous document returned in query (wt) (mms-dev)
Improvement SERVER-16632: Change WiredTiger index key format to no longer use BSON
Bug SERVER-16651: Mass deletions and updates (including TTL) completely starve insertions in replica set under WiredTiger
Bug SERVER-16694: Secondary hangs during shutdownServer()
Bug SERVER-16798: KeyString needs to support NUL bytes in Strings
Bug SERVER-3304: Change comparison order so all Dates sort before all Timestamps
Improvement SERVER-16567: extend data directory metadata to hold storage engine creation settings for startup validation
Bug SERVER-16274: secondary fasserts trying to replicate an index
Bug SERVER-14992: Query for Windows 7 File Allocation Fix, and other hotfixes
Task SERVER-16100: Clean up packaging scripts, remove hardcoded version from rpm spec files
Bug SERVER-16760: Coverity analysis defect 49690: Resource leak
Improvement SERVER-16030: Update sizeStorer data when collection validate is called
Bug SERVER-16767: Add cursor metrics to serverStatus in mongos
Bug SERVER-16415: mmapv1 replica multi collection insert is 70% slower vs no replication
Bug SERVER-16734: Remove storage.mmapv1.syncPeriodSecs and storage.wiredTiger.engineConfig.checkpointDelaySecs; use storage.syncPeriodSecs for both.
Bug SERVER-16706: Prevent_logOpRS from pushing primary's last optime back in time in doc-locking storage engines
Bug SERVER-3719: woCompare does not provide a total order over doubles and longs.
Bug SERVER-16660: sharding_system_namespaces.js incorrectly assumes that mongod supports wiredTiger
Bug SERVER-16707: WiredTiger cappedDeleteAsNeeded invariant failure
Bug SERVER-16673: fassert when multi-index build fails with WiredTiger
Bug SERVER-16724: Startup time under WiredTiger is extremely slow and gets worse as database grows
Bug SERVER-16675: getMore looks up doc with invalid RecordId, fails with "Didn't find RecordId in WiredTigerRecordStore"
Improvement SERVER-16742: KEEP_MUTATIONS stage is not needed for storage engines supporting doc-level locking
Sub-task SERVER-12833: SERVER-16100 Implement packaging for RC's and nightlies
Task SERVER-16764: Clean up replication code
Bug SERVER-16568: support "none" as a valid compressor option in WiredTiger
Bug SERVER-16687: MoveFile WiredTiger.turtle.set to WiredTiger.turtle: Broken pipe
Bug SERVER-16794: Invariant failure: WT_NOTFOUND error with concurrent removes and updates
Bug SERVER-16711: Do not create empty database while checking for collections
Bug SERVER-16106: Event Viewer (system) error when pressing power button on machine
Bug SERVER-16635: make sharding/mongos_no_replica_set_refresh.js test agnostic to who is elected primary
Bug SERVER-16753: Wrong component for commands
Bug SERVER-16692: Switching journalling off and on with WT not safe
Improvement SERVER-16602: Review WiredTiger default settings for engine and collections
Bug SERVER-16671: logging write conflicts at log level 0 is too aggressive
Improvement SERVER-16772: Eliminate redundant work in the update path
Improvement SERVER-15259: exitCleanly should not be called in error cases
New Feature SERVER-16744: Targeted community build packages and repo
Bug SERVER-16677: mongod.lock file should be present in data directory regardless of storage engine selected
Bug SERVER-16714: serverStatus command with oplog argument to config server returns error
Bug SERVER-16755: Global severity seems to overwrite component severity in some cases
Bug SERVER-16591: Deadlock due to KVDatabaseCatalogEntry doing blocking transactional operations under the _collectionsLock
Sub-task SERVER-12160: SERVER-16100 Allow packager.py and packager-enterprise.py to use arbitrary gitspecs instead of release tags
Bug SERVER-16615: Long database names will crash server during repair on mmapv1 when using directoryperdb
Bug SERVER-16667: Isolated writes with extreme latencies in replica set under WiredTiger
Bug SERVER-16260: Some commands no longer accept values of the Symbol BSON type
Bug SERVER-7804: compareElementValues for CodeWScope is broken
Improvement SERVER-16061: Remove support for "text" command
Improvement SERVER-16780: Missing auth test of cleanupOrphaned
Bug SERVER-16761: Coverity analysis defect 49668: PW.USELESS_TYPE_QUALIFIER_ON_RETURN_TYPE
Task SERVER-15541: Re-enable yielding
Bug SERVER-16748: consecutive replSetReconfig calls can trigger an invariant failure
Bug SERVER-16600: Windows: net stop service does not do clean shutdown
Bug SERVER-16684: Coverity analysis defect 49093: Unchecked dynamic_cast
Bug SERVER-16614: Windows: should allow users to install 2.6 and 2.8 enterprise versions
Improvement SERVER-16572: Add counter for calls to sched_yield in WiredTiger
Improvement SERVER-16683: Decrease mongos memory footprint when shards have several tags
Improvement SERVER-16580: Remove deprecated system collection references in JS tests
Bug SERVER-16623: Cannot allocate memory (wiredtiger) (mms-dev)
Bug SERVER-16502: CollectionInfoCache being written without exclusive lock
Bug SERVER-16834: Secondary nodes can hang during shutdown if BGSync::_buffer is full
Improvement SERVER-16777: Capped collection truncation behavior across storage engines is inconsistent
Improvement SERVER-16829: Expose tcmalloc runtime configuration options through setParameter mechanism
Task SERVER-16640: Long running queries on the secondary with WT
Bug SERVER-16517: Secondary on 2.8.0rc2 cannot keep up (insert-heavy, mmapv1) (mms-prod-queues)
Improvement SERVER-16483: Display collection name for the "Collection dropped or state deleted during yield of CollectionScan" warning
Bug SERVER-16716: Removing host string arg length limitation for mongo shell
Bug SERVER-16005: Inelegant abend when cannot bind() TCP 27017 at startup
Bug SERVER-16757: Incorrect query report for $explain
Bug SERVER-16649: mongos_rs_auth_shard_failure_tolerance.js should wait for writes to be replicated before shutting down the primary
Bug SERVER-16661: GlobalCursorIdCache leaks a SecureRandom
Bug SERVER-16705: leak in PortMessageServer::acceptMP
Bug SERVER-16740: Log contents instead of pointer address in shardCollection failure
Bug SERVER-16577: 2.8 doesn't have a field to report if query cache plan filters are used in explain
Task SERVER-16695: Move FSM tests into new test suites
Bug SERVER-16720: Init script in Red Hat fails if using YAML inline syntax
Bug SERVER-16723: display active commands in server status only when command metrics are available.
Improvement SERVER-16565: FsyncLock on WT should not imply "snapshotting" is OK
Improvement SERVER-16784: only enable the minimum necessary Scons tools
Bug SERVER-16721: Allow init script PIDFILEPATH to be configured via sysconfig
Bug SERVER-16275: MMAPv1 does not report when capped is false in colstats
Improvement SERVER-16682: remove duplicate sys/socket.h include from mongo/util/net/sock.h
Task SERVER-16778: Remove output to cerr in PlanRankingWorkPlansLongEnough

New in MongoDB 2.8.0 RC 4 (Dec 27, 2014)

Closed issues:
SERVER-16432: Chunk migration data structures not properly synchronized with storage engines that offer document-level locking
SERVER-16617: Performance regression has been introduced by f59a05c611d66a03c1fb8579b54569bfc2971374
SERVER-16237: Don't check the shard version if the primary server is down
SERVER-16624: Batch insert triggers deadlock-detection fassert
SERVER-16546: Mongod memory grows until killed with wiredTiger repl set with small oplog
SERVER-15798: Helpers::removeRange does not check if node is primary
SERVER-16179: lock manager timeout w/ stack trace
SERVER-16196: Add FSM-based concurrency tests to parallel suite
SERVER-16245: Expose index statistics for WiredTiger
SERVER-16392: ShardInfo should stop using mapped to get size estimate
SERVER-16390: Text stage fetches document twice if phrase or negation filter present
SERVER-16129: cloneCollection does not yield
SERVER-16406: New tests for big polygon
SERVER-16367: Add versioning info to WiredTiger
SERVER-16520: SERVER-14707 Allow creation of ClientCursor objects that are managed by a global registry
SERVER-14306: mongos can cause the in-memory sort limit to be hit on shards by requesting more results than needed
SERVER-16562: Extremely slow shutdown for WiredTiger (non-LSM)
SERVER-16534: SCRAM-SHA-1 auth mechanism should be allowed for __system@local user even if SCRAM-SHA-1 is not configured as an authMechanism
SERVER-16498: d_migrate.cpp should not rely on system.namespaces
SERVER-16633: Add timer to geo near stage to track execution time
SERVER-16457: WT verify and salvage operations failing with EBUSY
SERVER-16111: Store & display catalog creation metadata for WiredTiger collections & indexes
SERVER-16200: Profile and tune mmapv1 performance
SERVER-16523: SERVER-14707 listIndexes should leave a ClientCursor open if multiple batches needed
SERVER-16522: SERVER-14707 listCollections should leave a ClientCursor open if multiple batches needed
SERVER-16606: remove index blockCompressor and collection prefixCompression options
SERVER-16603: Fix rocks build
SERVER-16608: collStats scale argument does not apply to maxSize
SERVER-16081: init.d mongod startup script fails, with dirname message
SERVER-16197: "scons install" broken since tools rewrite
SERVER-16586: mongoperf crashes writing with MMF and syncDelay is other that 0-never
SERVER-16613: indexbg_restart_secondary.js

New in MongoDB 2.6.6 (Dec 10, 2014)

Fixed: Evaluating candidate query plans with concurrent writes on same collection may crash mongod SERVER-15580
Fixed: 2.6 mongod crashes with segfault when added to a 2.8 replica set with 12 or more members SERVER-16107
Fixed: $regex, $in and $sort with index returns too many results SERVER-15696
Change: moveChunk will fail if there is data on the target shard and an required index does not exist. SERVER-12472
Primary should abort if encountered problems writing to the oplog SERVER-12058
Closed issues:
SERVER-16324: Command execution log line displays "query not recording (too large)" instead of abbreviated command object
SERVER-16316: Remove unsupported behavior in shard3.js
SERVER-16291: Cannot set/list/clear index filters on the secondary
SERVER-16283: Can't start new wiredtiger node with log file or config file in data directory - false detection of old mmapv1 files
SERVER-16107: 2.6 mongod crashes with segfault when added to a 2.8 replica set with >= 12 nodes.
SERVER-16017: Suse11 enterprise packages fail due to unmet dependencies
SERVER-15994: listIndexes and listCollections can be run on secondaries without slaveOk bit
SERVER-15986: Starting with different storage engines in the same dbpath should error/warn
SERVER-15958: The "isMultiKey" value is not correct in the output of aggregation explain plan
SERVER-15899: Querying against path in document containing long array of subdocuments with nested arrays causes stack overflow
SERVER-15849: do not forward replication progress for nodes that are no longer part of a replica set
SERVER-15696: $regex, $in and $sort with index returns too many results
SERVER-15673: Disable SSLv3 ciphers
SERVER-15639: Text queries can return incorrect results and leak memory when multiple predicates given on same text index prefix field
SERVER-15632: MultiHostQueryOp::PendingQueryContext::doBlockingQuery can leak a cursor object
SERVER-15629: GeoParser::parseMulti{Line|Polygon} does not clear objects owned by out parameter
SERVER-15598: Ubuntu 14.04 Enterprise packages depend on unavailable libsnmp15 package
SERVER-15580: Evaluating candidate query plans with concurrent writes on same collection may crash mongod
SERVER-15552: Errors writing to temporary collections during mapReduce command execution should be operation-fatal
SERVER-15528: Distinct queries can scan many index keys without yielding read lock
SERVER-15515: New test for mixed version replSet, 2.4 primary, user updates
SERVER-15500: New test for system.user operations
SERVER-15491: SyncSourceFeedback can crash due to a SocketException in authenticateInternalUser
SERVER-15485: CanonicalQuery::canonicalize can leak a LiteParsedQuery
SERVER-15403: $min and $max equal errors in 2.6 but not in 2.4
SERVER-15318: copydb should not use exhaust flag when used against mongos
SERVER-15233: Cannot run planCacheListQueryShapes on a Secondary
SERVER-14886: Updates against paths composed with array index notation and positional operator fail with error
SERVER-14799: Count with hint doesn't work when hint is a document
SERVER-14763: Update jstests/sharding/split_large_key.js
SERVER-14728: Shard depends on string comparison of replica set connection string
SERVER-14506: special top chunk logic can move max chunk to a shard with incompatible tag
SERVER-14299: For sharded limit=N queries with sort, mongos can request >N results from shard
SERVER-14287: ensureIndex can abort reIndex and lose indexes
SERVER-14249: Add tests for querying oplog via mongodump using --dbpath
SERVER-14184: Unused preprocessor macros from s2 conflict on OS X Yosemite
SERVER-14080: SERVER-8752 Have migration result reported in the changelog correctly
SERVER-14057: Changing TTL expiration time with collMod does not correctly update index definition
SERVER-14015: S2 Compilation on GCC 4.9/Solaris fails
SERVER-13726: indexbg_drop.js
SERVER-13595: Red Hat init.d script error: YAML config file parsing
SERVER-13471: Increase log level of "did reduceInMemory" message in map/reduce
SERVER-12472: Fail MoveChunk if an index is needed on TO shard and data exists
SERVER-12061: Do not silently ignore read errors when syncing a replica set node
SERVER-12058: Primary should abort if encountered problems writing to the oplog
SERVER-10069: Improve errorcodes.py so it captures multiline messages

New in MongoDB 2.8.0 RC 1 (Nov 25, 2014)

Bug: tailable cursor may miss uncommitted documents
Bug: Deadlock with the WiredTiger storage engine between ListDatabases and DropCollection
Bug: replSetInitiate races with initial sync, resulting in no primary
Bug: WT Performance Regression for update of hot document on 2014-11-10 builds
Bug: Querying against path in document containing long array of subdocuments with nested arrays causes stack overflow
Bug: WriteConflict exception thrown in logOp during update
Bug: mongodump --repair not working under WiredTiger
Bug: After hitting open file limits - WT goes into a loop at shutdown and needs forced kill
Bug: Re-enable rollback_too_new.js with logic that doesn't violate WT oplog assumptions
Task: make maxSyncSourceLagSecs.js resilient against incorrect primary being elected
Bug: Hang during initial sync of 2.8.0-rc0 (wiredtiger)
Bug: Fail initial sync if cloner has index/data errors
Bug: Race in initiate causing no primary to be electable
Bug: Periodic throughput pauses during write load on WT
Bug: MongoD 2.8rc0 terminates with "WiredTigerRecordStore::insertRecord 12: Cannot allocate memory"
Bug: Improve namespace construction in commands
Improvement: invariant, not dassert on all CollectionMetadata reload codepaths
Bug: $explain query against sharded collection with 2.6 shard returns error
Bug: 2.8.0-rc0 shell can't auth to a 2.4 server
Bug: Input validation on the arguments to createCollection
Bug: geo_2d_explain.js is not deterministic
Improvement: createCollection shell helper should take noPadding param and warn on usePowerOf2Sizes
Improvement: Re-enable test from SERVER-10341
Bug: All callbacks invoked by WiredTiger (and other C) storage engines must terminate rather than propagate exceptions
Bug: geo_s2ordering.js depends on server performance
Bug: Rocks storage engine build break
Bug: Missing state change logging for replica set members
Improvement: Increase unit test coverage replica_set_config_checks functions
Bug: Make sure stepDown command can be interrupted with killop
Bug: Stacktrace in logs after creating collection with invalid options
Bug: Invariant failure when running explained update
Bug: tcmalloc issues with OS X 10.10
Task: explain shell helpers should retry using $explain if explain command fails on a mixed version sharded cluster
New Feature: Add configure time checks to enforce compiler minima
Bug: deadlock at shutdown
Bug: Uninitialized value used in SCRAM code
Bug: dropDatabase is slow and returns success immediately though it then blocks progress while running
Bug: Regex query returns incorrect results when index is present
Bug: $in count query with null array does not yield error on empty collection
Bug: misleading "closing cursor" message when retrying stale version
Improvement: consolidate WriteConflictException retry logging logic
Improvement: remove excessive log syncing in WT size storer
Bug: Contention on mutex protecting canAcceptWritesForDatabase access with WT
Bug: Server aborts when querying specific polygon/linestring intersections
Bug: Exponentially back off for write conflict exceptions.
Bug: Logically dead code in CachedPlanStage
Improvement: Add argument to replSetStepDown to allow users to specify how long to wait for secondaries to catch up
Improvement: Add replica set downgrade test.
Sub-task: SERVER-1241 Move audit message up and out of MMAPv1 layer
Bug: Make it possible to get the return code from startParallelShell
Bug: No error message for invalid config in mixed version replset
Bug: ResourceId constructors use operator% where they should use operator& for bit masking
Sub-task: SERVER-15541 Query stages should clear/set their OperationContext pointer in saveState()/restoreState()
Task: Disable getIteratorForRepair in WiredTiger
Bug: do not compare pointer addresses in WT Iterator::restoreState()
Improvement: Remove extra Timer and std::string in AutoGetCollectionForRead
Bug: CanonicalQuery leaks in mr::MapReduceCommand::run(), mr::State::finalReduce(), newRunQuery()
Bug: replSetStepDown without force argument will fail if secondaries are behind and there is any write load
Improvement: Server should not fassert on invalid wiredtiger config options
New Feature: Prevent starting a 2.8 server with 2.4 style users
Bug: WT show performance regression comparing to 10/31 build
Bug: drop queued WT idents on startup
Improvement: Add special WT_CONNECTION::reconfigure command
Improvement: reads often aren't possible while in fsync and lock mode
Improvement: Detect if JSThread threw JS or C++ exception
Sub-task: SERVER-1241 Reenable killall.js after implementing priorities for the shutdown X-lock thread
Bug: replication should stop on inShutdown
Bug: We need to call commitAndRestart on the active recovery unit before releasing our last lock
Sub-task: SERVER-15541 audit re-enabled yielding paths for sharding
Improvement: mongo::profile() shouldn't reuse BufBuilder when profile collection created
Bug: jsCore in small oplog failing during shutdown in ASAN build
Bug: rocks storage engine should deal with nested recovery units correctly
Bug: Add currentOpCtx command to the auth test suite
Task: unit test new majority write behavior in ReplicationCoordinator
Bug: Batched insert command does not yield
Improvement: Use WT bulk loader for foreground index builds
Bug: Segfault in prefetch worker when replicating an insert that creates a database implicitly
Bug: Lock manager should expose methods that separate enqueuing a lock request and waiting for it to be satisfied
Bug: Command parameters not redacted for LOG(2)
Task: Rename heap1 internal classes and filenames to inMemory
Bug: Enable Ulimit warning on Linux
Task: Unify implementation and error code usage of checkForInterrupt and checkForInterruptNoAssert
Improvement: Remove sharding_balance_randomorder1.js
Bug: Do not announce a 'yea' vote when not voting 'yea'
Task: Add storage engine config options to smoke.py and jstests
Bug: clear oplog before starting initial sync
Bug: remove _forceLegacyShardWriteMode from v2.8 mongos
Bug: exiting with SIGINT during WT initialization can fassert
Task: Remove LegacyReplicationCoordinator and rip out dead code
Bug: Shell method DBExplainQuery.count() should return the explain results, not 'this'
Task: Change wiredtiger engine name to wiredTiger for consistency
Bug: The "isMultiKey" value is not correct in the output of aggregation explain plan
Bug: listIndexes and listCollections can be run on secondaries without slaveOk bit
Improvement: Suppress non-applicable profiling data when using WT
Improvement: invariantOK that takes a status
Bug: Updates against paths composed with array index notation and positional operator fail with error
Bug: NamespaceString is inconsistently validating collection names
Improvement: Remove authenticate messages from --quiet logging
Improvement: Expose electionId on primary in isMaster
Improvement: Simplify log component names
Bug: Repeated "[ReplicationExecutor] could not find member to sync from" in healthy replica set
Bug: benchRun should not abort shell when worker threads fail to connect to server
Improvement: mongod --version shouldn't print date, severity, log component
Bug: no space in between collection and name for drop index errmsg
Bug: Windows service: net stop MongoDB gives an error even after stopping the service
Bug: Typo in '__system user/no --keyFile' error message

New in MongoDB 2.6.4 (Aug 12, 2014)

New in MongoDB 2.7.4 Development (Jul 28, 2014)

Bug SERVER-14556: Default dbpath for mongod --configsvr changes in 2.6
Bug SERVER-14311: skipping of index keys is not accounted for in plan ranking by the index scan stage
Bug SERVER-14431: Invalid chunk data after splitting on a key that's too large to index
Bug SERVER-14283: Parameters in installed config file are out of date
Bug SERVER-14538: use-after-free in mongo::profile
Improvement SERVER-14690: no_chaining.js is flakey
Task SERVER-14532: Improve logging in the case of plan ranker ties
Bug SERVER-14494: Dropping collection during active background index build on secondary triggers segfault
Bug SERVER-14505: cannot dropAllIndexes when index builds in progress assertion failure
Bug SERVER-14355: Failed to create capped collection for profiling
Bug SERVER-14212: Mongorestore: using --drop drops Admin users & roles
Bug SERVER-14024: Update fails when query contains part of a DBRef and results in an insert (upsert:true)
Bug SERVER-6687: Valgrind reports "Syscall param write(buf) points to uninitialised byte(s)" on config servers
Improvement SERVER-13648: better stats from migration cleanup
Bug SERVER-12750: mongos shouldn't accept initial query with "exhaust" flag set
Bug SERVER-14625: Query planner can construct incorrect bounds for negations inside $elemMatch
Bug SERVER-14607: hash intersection of fetched and non-fetched data can discard data from a result
Bug SERVER-14123: explain can create a too-large BSONObj
New Feature SERVER-14518: Allow disabling hostname validation for SSL
Bug SERVER-14665: Build failure for v2.6 in closeall.js caused by access violation reading _me
Bug SERVER-14284: jstests should not leave profiler enabled at test run end
Improvement SERVER-9561: Add HOST_ARCH and TARGET_ARCH (and other SCons MS vars) as Variables for MSVC build
Bug SERVER-14476: JSTests::invokeLogError log check is still flawed
Bug SERVER-14641: replication cannot keep up in zbigMapReduce.js
Bug SERVER-14599: Fix error that caused ReplicationExecutor::getWork to busy wait on some platforms
Improvement SERVER-14526: Introduce unittest macros that allow inspecting the exception thrown in ASSERT_THROWS.
Task SERVER-14587: Allow OIDs to be stored in unordered_maps
Improvement SERVER-14586: add toBSON methods to ReplicaSetConfig and MemberConfig classes
Bug SERVER-14522: add fassertFailedWithStatus to errorcodes.py
Improvement SERVER-14436: Implement new types to represent replica set configuration.
Bug SERVER-14581: mongod doesn't compile with cpu-profiler option
New Feature SERVER-14416: extend setParameter to accept BSON object
Improvement SERVER-14653: Allow streaming into ASSERT_TRUE and ASSERT_FALSE unittest macros
Task SERVER-14560: Add cancelHeartbeats
Improvement SERVER-14524: decompose jsobj.cpp
Improvement SERVER-14656: replSetSyncFrom helpers in topology coordinator
Improvement SERVER-14527: MongoDB servers processes should only setLastError when wire writes or write commands fail.
Improvement SERVER-12751: BSONBuilderBase is unused in the codebase
Sub-task SERVER-10448: Allow stats to be gathered directly from the execution stages
Sub-task SERVER-13641: Move killCurrentOp out of threadlocal
Improvement SERVER-14499: remove ReplicationStartSynchronizer
Improvement SERVER-14592: deinline bson-inl.h
Task SERVER-14517: Add doMemberHeartbeat
Task SERVER-14503: move hasDatabases from instance.cpp to heartbeat.cpp
Bug SERVER-14299: For sharded limit=N queries with sort, mongos can request >N results from shard
New Feature SERVER-11118: Add dateToString aggregation operator
Bug SERVER-14502: dereference of canonical query before NULL check in getExecutorIDHack()
Improvement SERVER-14528: Move HostAndPort::me functionality out of HostAndPort type.
Bug SERVER-14671: s2 fails to compile on clang
Improvement SERVER-14613: Refactor HeartbeatInfo and health
Improvement SERVER-14437: Implement new data structures to represent replica set tag information
Bug SERVER-14685: sharding/auth.js test is flaky
Improvement SERVER-14417: migrate QLOG to kQuery LogComponent
Improvement SERVER-14500: remove the replSet bool
Task SERVER-14652: Update tests for localhost exception
Task SERVER-14484: remove the replset portion of dbtest
Bug SERVER-14549: Race condition can cause replSetUpdatePosition command to be sent with information about nodes that the sync source doesn't yet know about
Sub-task SERVER-14624: Implement methods to validate replica set configuration changes
Task SERVER-14316: Remove addUser function from the shell
Improvement SERVER-14533: Break circular dependence in build system among foundation, network and lasterror libraries.
Bug SERVER-9986: Refactor $geoNear searches into new query framework
Bug SERVER-14645: Failure in rollback_cmd_unrollbackable.js
Bug SERVER-5436: IPv6 address ambiguity in HostPort syntax
New Feature SERVER-12512: Add role-based, selective audit logging.
Bug SERVER-14554: DBRef JS constructor does not accept $db with --js-engine=v8-3.25
New Feature SERVER-14415: log component hierarchy
Sub-task SERVER-14407: Get rid of query runners
Task SERVER-14420: Get rid of global replSettings object
Bug SERVER-11107: By default, mongod should not start with an expired or invalid server certificate
Improvement SERVER-6352: Add sh.removeTagRange(ns, min, max, tag)
Improvement SERVER-14041: enhance secondaryThrottle parameter
Task SERVER-14550: Stop maintaining the local.slaves collection
Improvement SERVER-14582: ReplSetTest.waitForIndicator should work with auth on even when primary is down
Sub-task SERVER-14591: Implement getLastErrorDefault inside replcoordinator
Task SERVER-14395: dur::startup() should only be called when using mmapv1 engine
Sub-task SERVER-14458: Add hybrid ReplicationCoordinator to facilitate the transition from the LegacyReplicationCoordinator to the new ReplicationCoordiantorImpl
Task SERVER-14559: Add processNewConfig workflow
Bug SERVER-13764: debug mechanisms report incorrect nscanned / nscannedObjects for updates
Improvement SERVER-14650: Rename ROLE_SOURCE_FIELD_NAME to ROLE_DB_FIELD_NAME
Improvement SERVER-14482: Add ability to append RegEx using BSONArrayBuilder
Improvement SERVER-4282: clean up log messages
Bug SERVER-13177: mongooplog crashes on assertion when it cannot connect to "from" host
Bug SERVER-13730: rs.help() link to REST interface is incorrect
Task SERVER-14536: Helgrind suppressions for race-prone counters.cpp code
Improvement SERVER-5668: Add appendBinData method to BSONArrayBuilder

New in MongoDB 2.7.3 Development (Jul 4, 2014)

Equality queries on _id with projection on _id may return orphan documents on sharded collections
Equality queries on _id with projection may return no results on sharded collections
stepdown during migration range delete can abort mongod
SEVERE server crash when $centerSphere has non-positive radian
negative opcounter values in serverStatus
do not aggressively pre-fetch data for parallelCollectionScan
SERVER-14135 replSetReconfig and initial config loading through the LegacyReplicationCoordinator
SERVER-14135 Move command processing into the ReplicationCoordinator
SERVER-14135 setLastOptime for slave replication tracking in LegacyReplicationCoordinator
SERVER-14135 awaitReplication in LegacyReplicationCoordinator
SERVER-14135 setLastOptime and awaitReplication in new Replication Coordinator
SERVER-14135 stepdown and shutdown functionality in LegacyReplicationCoordinator
Remove unused files in 2.7 branch
De-inline HostAndPort type, and remove dependencies on networking components.
Move HostAndPort::isSelf to a free function in the repl namespace
mongos does not respect secondary preferred after temporarily unavailable secondary
when a socket between mongos and mongod fails, close all connections immediately
Support for Debian 7 Enterprise .deb packages
Additional tests for setting fields with $ names
struct for ReplicationExecutor work callback parameter
Add StringData() method to BSONElement
Remove hardcoded Visual Studio solution and project files
Do not store native function pointer as a property in function prototype
Fix include-what-you-use fallout from de-inlining hostandport.h
make index_multi.js retry on connection failure
initial_sync3.js occasionally fails by calling insert on a non-primary node
mongorestore has no way to accept input from stdin
SERVER-10448 Explain Command for Explaining Count
clean quota api internally
mongoimport doesn't support $maxKey and $minKey extended JSON
Replace i686 in Linux-32 tarball filename and inner directory name with i386
Deprecate mongoutils namespace
Reenable sasl_authentication_session_test
remove getIndexPrefetchConfig calls from outside the repl namespace
eliminate isCurrentlyAReplSetPrimary
Improve errorcodes.py so it captures multiline messages
SERVER-1241 Prototype Lock Manager for document-level locking
SERVER-10448 Execution Explain for Find
Introduce HostAndPort::parse method
ConnectionString constructor should either work correctly or fail to compile when passed a single string.
avoid attempting to reconfig before node 3 comes back online in reconfig.js
better named logging with tracing
Primary should step down if encountered problems writing to the oplog
Introduce unittest::assertGet(StatusWith) method to facilitate testing functions that return StatusWith
Dead code in IDHackRunner::applyProjection
mongod fails when launched with misconfigured locale
mongoexport generates 'ObjectID', while the shell is using 'ObjectId'
canonicalizeClusterDN may synthesize an invalid iterator
Increase log level of "did reduceInMemory" message in map/reduce
rs.add could detect _id
Upstart configuration fails to start server if other instances are running
mongorestore parseMetadataFile passes non-null terminated string to 'fromjson'
convert HashTable::iterAll() to use boost::bind instead of function callback
Add ability to print/decode top level JSON Array
--use-system-yaml does not detect libyaml-cpp-dev
geoNear should not allow $natural
distinct command should validate input
ShardingTest and authutil js incorrectly handle keyfile authentication
Position of parameters within out {} object shouldn't matter
mongoperf crashes randomly when writing with MMF and record size >4k

New in MongoDB 2.6.3 (Jun 21, 2014)

New in MongoDB 2.6.2 (Jun 18, 2014)

New in MongoDB 2.7.2 Development (Jun 16, 2014)

New in MongoDB 2.6.2 RC 0 (Jun 3, 2014)

Fixed:
mapReduce replicates _inc temp collection without _id field
Plans with differing performance can tie during plan ranking
mongod may terminate if x.509 authentication certificate is invalid
Make sure user cache entry is up to date before using it to determine a user's roles in user management commands on mongos
We don't mark V1 users as probed on databases for which they do not have surrogate user documents
IndexBounds::endKeyInclusive not initialized by constructor
Unused snapshot history consuming significant heap space
sync2.js failed
Test suites with options tests fail when run with --nopreallocj
"Whole index scan" query solutions can use incompatible indexes, return incorrect results
Index bounds builder constructs invalid bounds for multiple negations joined by an $or
Cloner needs to detect failure to create collection
noscripting configuration option not available in YAML configuration file
Stack overflow when parsing deeply nested $not query
Insert field validation stops at first Timestamp field
ConvertToCapped on empty collection aborts after invariant() failure
Add new lsb file location for Debian 7.1
tags.js has been flakey due to change in its timeout when it was ported to use write commands
Distinct command on indexed field with geo predicate fails to execute
Unable to install mongodb-org-server 2.6.1-1 on RHEL5 via RPM
Mongodump cannot query oplog.$main or oplog.rs when using --dbpath
mongodb-enterprise is missing needed dependency list
Bounds should not be combined for $or queries that can use merge sort
MongoDB upgrade 2.4 to 2.6 check returns error in internal collections
Solaris builds depend on ILLUMOS libc
Some nested queries trigger an assertion error
CollectionOptions parser should skip "size"/"max" elements if values non-numeric
mongoexport crashes on large timestamps on Windows
Windows file locking related buildbot failures
The built-in roles "restore" doesn't have insert privileges on system.roles collection
Converting v8 internal object to JSON may crash
planSummary truncated at 255 characters
verify assert on empty $in clause and sort on second field in compound index
Catch exception thrown by getShardsForQuery for geo query
Results of $near query on compound multi-key 2dsphere index not sorted by distance
SSL-enabled server appears to not be sending the list of supported certificate issuers to the client
getRunner() returns a bad runner when mixing $or, sort, and NO_BLOCKING_SORT
non-top-level indexable $not triggers query planning bug
Queries containing $or may miss results if multiple clauses use the same index
Shell returns incorrect WriteResult for compatibility-mode upsert with non-OID equality pred on _id field
The "backup" auth role should allow running the "collstats" command
Moving large collection across databases with renameCollection triggers fatal assertion
Excessive freelist scanning for MaxBucket
connections_opened.js failure
setup_multiversion_mongodb.py doesn't download 2.4.10 because of non-numeric version sorting
ndeleted in system.profile documents reports 1 too few documents removed
"type 7" (OID) error when acquiring distributed lock for first time
Shell prints startup warning when auth enabled
Improved:
Need to expose better timing information in currentOps
awaitReplication() sometimes fails to get a config version from master causing test failures
Match x.509 cluster certificates per attribute instead of substring comparison
when 1st config server is non-responsive, some operations wait for network timeout
Add planSummary information to count command
log a message when shouldChangeSyncTarget() believes a node should change sync targets
Typo in error message for "compatibility mode"

New in MongoDB 2.7.1 Development (May 28, 2014)

Fixed:
mapReduce replicates _inc temp collection without _id field
mongod crashes when re-mapping above user address space of 8TB on Windows
VS 2013 32-bit binaries do not run on Windows XP
Make sure user cache entry is up to date before using it to determine a user's roles in user management commands on mongos
We don't mark V1 users as probed on databases for which they do not have surrogate user documents
IndexBounds::endKeyInclusive not initialized by constructor
The built-in roles "restore" doesn't have insert privileges on system.roles collection
Unused snapshot history consuming significant heap space
Bounds should not be combined for $or queries that can use merge sort
sync2.js failed
Converting v8 internal object to JSON may crash
Test suites with options tests fail when run with --nopreallocj
"Whole index scan" query solutions can use incompatible indexes, return incorrect results
Mongodump cannot query oplog.$main or oplog.rs when using --dbpath
Windows file locking related buildbot failures
Index bounds builder constructs invalid bounds for multiple negations joined by an $or
Insert field validation stops at first Timestamp field
Add new lsb file location for Debian 7.1
Some nested queries trigger an assertion error
Unable to install mongodb-org-server 2.6.1-1 on RHEL5 via RPM
CollectionOptions parser should skip "size"/"max" elements if values non-numeric
Shell returns incorrect WriteResult for compatibility-mode upsert with non-OID equality pred on _id field
Running resync before replset initializes can crash mongod
Coverity analysis defect 15490: Logically dead code
prevent updateUpstream from using a null connection
ExtentManager interface
Leave false config file switches in getCmdLineOpts.parsed
Red Hat init.d script error: YAML config file parsing
Coverity analysis defect 22903: Dereference null return value
Use RAII to prevent memory leaking in shard targeting
Improvement:
awaitReplication() sometimes fails to get a config version from master causing test failures
mongod could warn user if OS transparent huge pages feature is on
Match x.509 cluster certificates per attribute instead of substring comparison
log a message when shouldChangeSyncTarget() believes a node should change sync targets
Provide richer unwind information in logged stack traces on POSIX systems.
Improve user cache invalidation enforcement on mongos
User cache is invalidated too often and too crudely
Javascript code should throw instances of Error instead of strings.
On Windows, windows_basic.h should error if we don't have both NTDDI_VERSION and _WIN32_WINNT
relax merge chunk constraints
enable build on arm64 system
Provide implementation of AtomicWord in terms of std::atomic

New in MongoDB 2.6.1 (May 6, 2014)

New in MongoDB 2.6.1 RC 0 (Apr 23, 2014)

Fixed:
Concurrent GETMORE and KILLCURSORS operations can cause race condition and server crash
Changing replica set configuration can crash running members
Array updates on documents with more than 128 BSON elements may crash mongod
Background index builds from a 2.6.0 primary fail to complete on 2.4.x secondaries
Using the OplogReplay flag with extra predicates can yield incorrect results
Replicated data definition commands will fail on secondaries during background index build
Sensitive credentials in startup options are not redacted and may be exposed
Upgrading from 2.4.x to 2.6.0 via yum clobbers configuration file
Cannot install MongoDB as a service on Windows
mongos does not generate _id for insert documents that are missing it
geoNear returns distance in meters for legacy points in 2.6
replset2.js can swallow assertion failures in test
stepdown_wrt_electable.js makes unsafe use of parallel shells and is unstable as a result
Ignore orphan documents in sharding_migrate_cursor1.js
some query stage constructors touch disk
mr_drop.js is flakey when run in parallel with other tests
Remove data in test array_shard_key.js
rollback5.js can fail due to poor assumptions it makes
Queries using tailable cursors only return one batch if combined with skip()
initial sharding with hashed shard key can result in duplicate split points
geonear command creating too-large BSONObjs
negation of $elemMatch value incorrect in 2.6
$where should not be allowed under $elemMatch
Improve wire API message validation
2.6.0 does not recognize all sort orders provided by a compound index if the index has trailing fields
near queries must ensure legacy points are in bounds
$elemMatch using a compound multikey index can generate an incorrect plan
Creating index with same name but different spec in mixed version replicaset can abort replication
Yield policy for batch-inserts should be the same as for batch-updates/deletes
Large skip and and limit values can cause crash in blocking sort stage
Log rotation can overwrite previous log files
fix geo_borders.js
Wait for deletion after migration in feature2.js
Explode for sort should try reversing index scan direction
Write-error contains incorrect namespace when collection creation fails
Improved:
Addition of debug symbols has doubled compile time
getUser and getRole shell helpers shouldn't throw when user/role not found
Negations over multikey fields do not use the index

New in MongoDB 2.4.10 (Apr 5, 2014)

New in MongoDB 2.6.0 RC 3 Development (Apr 3, 2014)

New in MongoDB 2.4.10 RC 0 (Mar 27, 2014)

New in MongoDB 2.6.0 RC 2 (Mar 22, 2014)

New in MongoDB 2.6.0 RC 1 (Mar 7, 2014)

New in MongoDB 2.6.0 RC 0 (Feb 22, 2014)

New in MongoDB 2.5.5 Development (Feb 1, 2014)

New in MongoDB 2.4.9 (Jan 11, 2014)

New in MongoDB 2.4.9 RC0 (Dec 28, 2013)

New in MongoDB 2.5.4 Development (Dec 2, 2013)

New in MongoDB 2.4.8 (Nov 2, 2013)

New in MongoDB 2.4.7 (Oct 22, 2013)

New in MongoDB 2.5.3 Development (Oct 19, 2013)

New in MongoDB 2.4.7 RC0 (Oct 11, 2013)

New in MongoDB 2.5.2 Development (Aug 27, 2013)

New in MongoDB 2.4.6 (Aug 21, 2013)

New Features:
Add a global flag to turn off the TTLMonitor thread
Improvements:
Add blockCheckSupported() features to Solaris/SmartOS build
Every write to journal costs additional seek to update file metadata
Display chunk version, not memory address, in non-default log line
Sanity check on "from" side that all cloned and modified documents were sent to TO side on commit
Bug fixes:
Sorting on chunks not applied in differ
Heatbeats can time out due to high network latency while fetching oplog batches. Was: buildbot: zbigMapReduce failing on Linux 64-bit DEBUG
File processinfo_darwin.cpp missing from mongo-cxx-driver
Missing PF_LOCAL symbol in Solaris 10
Solaris file relocation error: posix_fadvise
Missing external symbol strcasestr on Solaris 10
sharding/index1.js failure on V2.4 Linux 64-bit Subscription SUSE 11
buildbot: replset9.js failing on Linux RHEL 32-bit
buildbot-special: smoke JsobjTests::BufBuilderReallocLimit failing on Nightly Linux 64-bit SSL Ubuntu 1204
Shell displays "JavaScript execution failed: " before all JavaScript errors, adds "L" before line number
saslStart returns {ok: 1} instead of {ok:0, code: 2} when unsupported mechanism specified.
Server in replication set fluctuates between states SECONDARY and ROLLBACK if it can't rollback due to too much rollback data
balancer should stop when ConfigServerCheck indicates inconsistency
remapPrivateView: Solaris mmap() is not atomic
Failed SSL connection memory leak
On Solaris, link to backtrace() at run-time or emulate it if not found
js fails when balancer interferes
src/mongo/util/stacktrace.{cpp,h} are missing license headers
Very large documents can cause premature migration commit
Simple client fail with segmentation fault in mongoclient library
Fail if javascript field names have nulls
read_pref_cmd.js failed on multiple v2.4 builders
strcasestr emulation returns invalid pointer
mongo shell crashes with missing host
chaining.js timing out on OS X 10.5 64-bit, Windows 64-bit, Linux 64-bit
replication tests with auth fail on V2.4 Linux 64-bit Subscription SUSE 11
mongod always split at 250000 position
finding start cursor can get starved
remove2.js failed on special V2.4 Linux 64-bit SSL SUSE 11 Build #157
auto2.js failing on Win32 builder
chaining.js failed on Linux 64-bit subscription, "error doing query"
Do not change code pages in Windows version of mongo shell
Add more details on why a shard is 'unavailable' for balancing
Possible bug with SSL handshake

New in MongoDB 2.4.6 RC1 (Aug 13, 2013)

New in MongoDB 2.4.6 RC0 (Aug 10, 2013)

New in MongoDB 2.4.5 (Jul 4, 2013)

New in MongoDB 2.4.5 RC0 (Jun 26, 2013)

New in MongoDB 2.4.4 (Jun 5, 2013)

New in MongoDB 2.4.4 RC0 (May 29, 2013)

New in MongoDB 2.5.0 Development (May 23, 2013)

New in MongoDB 2.4.3 (Apr 24, 2013)

New in MongoDB 2.4.3 RC0 (Apr 19, 2013)

New in MongoDB 2.4.2 (Apr 18, 2013)

New in MongoDB 2.4.2 RC0 (Apr 11, 2013)

New in MongoDB 2.4.1 (Mar 23, 2013)

New in MongoDB 2.4.0 (Mar 19, 2013)

CHANGES:
Major Features:
Text Search
New Geospatial Indexes with GeoJSON and Improved Spherical Geometry
New Hashed Index and Sharding with a Hashed Shard Key
Hashed Index
Hashed Sharding
Security Improvements:
New Modular Authentication System with Support for Kerberos
Role Based Access Control and New Privilege Documents
Administration Changes:
--setParameter Option Available on the mongos and mongod Command Line
Changes to serverStatus Output Including Additional Metrics
Increased Chunk Migration Write Concern
BSON Document Validation Enabled by Default for mongod and mongorestore
Indexing Changes:
Support for Multiple Concurrent Index Builds
db.killOp() Can Now Kill Foreground Index Builds
Improved Validation of Index Types
Interface Changes:
$setOnInsert – New Update Operator
Limit Number of Elements in an Array
JavaScript Engine Changed to V8
Additional Limitations for Map-Reduce and $where Operations
Improvements to the Aggregation Framework:
$match queries now support the $geoWithin operator for bounded geospatial queries.
The new $geoNear pipeline stage to support geospatial queries.
$min operator only considers non-null and existing field values. If all the values for a field are null or are missing, the operator returns null for the minimum value.
For sort operations where the $sort stage immediately precedes a $limit in the pipeline, the MongoDB can perform a more efficient sort that does not require keeping the entire result set in memory.
The new $millisecond operator returns the millisecond portion of a date.
The new $concat operator concatenates array of strings.
NEW:
Developer Productivity:
Aggregation Framework refinements include an overhaul of the underlying engine introduced in MongoDB 2.2 making it easier to leverage real-time, in-place analytics. MongoDB 2.4 includes significant performance improvements, additional support for binary data, support for $geoWithin and $near geospatial queries, improved string concatenation with the new $concat operator, and improved date calculation semantics.
Geospatial enhancements support new use cases with support for polygon intersection queries (with $geoIntersects), support for GeoJSON, and an improved spherical model. Learn more about geospatial improvements in 2.
Text Search provides a simplified, integrated approach to incorporating search functionality into apps with support for language specific stemming and stop words in 15 languages and real time indexes. Text search is beta for 2.4 and is not recommended for production use. Learn more about text search.
New update semantics for arrays with the $push update operator. Applications can now use $slice to maintain fixed size arrays, and use $sort to maintain sorted arrays. Learn more about capped arrays.
New $setOnInsert update operator supports specifying fields to add only on insert and upsert operations.
Ease of Operations:
Hashed indexes and shard keys provide simple, even distribution for reads and writes. Learn more about hashed indexes and shard keys.
New serverStatus metrics including a working set analysis tool makes capacity planning easier for operations teams. Learn more about the new serverStatus metrics including the working set analyzer.
More control for operators with the ability to terminate indexing operations with automatic resource cleanup.
Improved Performance:
V8 JavaScript engine offers better performance and concurrency with JavaScript based actions including those using the $where query operator as well as mapReduce and eval. Learn more about MongoDB on V8, and JavaScript Changes in MongoDB 2.4.
Improvements to count provide dramatically faster count operations. Counting is now up to 20 times faster for low cardinality index based counts.
Significant optimizations to $elemMatch when using a multi-key index.
More Robust Security:
Role-Based privileges allow organizations to assign more granular security policies for server, database and cluster administration. Learn more about role based access control in MongoDB.
Kerberos authentication mechanism in MongoDB Enterprise.

New in MongoDB 2.4.0 RC3 (Mar 14, 2013)

New in MongoDB 2.4.0 RC2 (Mar 7, 2013)

New in MongoDB 2.4.0 RC1 (Feb 26, 2013)

New in MongoDB 2.2.3 (Feb 2, 2013)

New in MongoDB 2.4.0 RC0 (Feb 2, 2013)

New in MongoDB 2.2.3 RC1 (Jan 26, 2013)

New in MongoDB 2.2.3 RC0 (Jan 12, 2013)

New in MongoDB 2.3.2 Development (Jan 12, 2013)

New in MongoDB 2.2.2 (Dec 3, 2012)

New in MongoDB 2.2.1 (Oct 31, 2012)

New in MongoDB 2.2.1 RC0 (Sep 24, 2012)

New in MongoDB 2.2.0 RC 2 (Aug 24, 2012)

New in MongoDB 2.2.0 RC 1 (Aug 14, 2012)

Bug:
[SERVER-5064] - mongos can't start when one config server is down. only with keyFile options
[SERVER-5373] - sporadic failure in profile1.js test
[SERVER-5595] - C++ Driver Fails to connect to a replica set when the replica set is initially down and then is started
[SERVER-5996] - "uncaught exception: map reduce failed" in zbigMapReduce.js
[SERVER-6177] - verify assertion when parent of an inclusion field is an operator expression
[SERVER-6179] - Sharded aggregation can't handle multiple $group commands
[SERVER-6181] - attempt to $project a computed _id field results in a document with two duplicate (wrong) _id values
[SERVER-6185] - verify assertion on attempt to include a subfield within a non object array element
[SERVER-6194] - Nested $add operators may be improperly reordered by constant folding implementation
[SERVER-6198] - $group aggregate field names can contain dots, may cause problems with sharding
[SERVER-6238] - Aggregation shouldn't allow creating fields with a $ prefix
[SERVER-6275] - $avg assume 0 for undefined
[SERVER-6282] - Shards: getLastError waits 1 second to respond after insert with invalid shard key
[SERVER-6380] - Close keyFile filedescriptor after reading the security key
[SERVER-6385] - chunk too big to move in authCommands2.js
[SERVER-6391] - Yielding with one (or more) active writer and heavy read load results in severe performance degradation
[SERVER-6398] - Cannot read from replset member in slavedelay1.js
[SERVER-6403] - sharded indexes are queried via the db primary, which is not guaranteed to have the full set of collection indices
[SERVER-6463] - Mongos sets shard host string to "set/" without any seed members
[SERVER-6468] - Treat nested and dotted projections the same
[SERVER-6474] - Error message for attempting replSetSyncFrom "self" needs improvement.
[SERVER-6477] - jstests/dur/closeall.js -- WindowsFlushable::flush triggers fassert after FlushViewOfFile fails with code 487 (ERROR_INVALID_ADDRESS)
[SERVER-6492] - isMaster() hangs when called on REMOVED node
[SERVER-6498] - mongoimport throwing "read error, or input line too long (max length: 16777216)"
[SERVER-6499] - compact's external sorter should use the default index version key comparator
[SERVER-6507] - mongostat lock% reports a number higher than (100% times number of cores)
[SERVER-6509] - ignore SIGPIPE
[SERVER-6512] - ReplicaSetMonitor::_checkConnection does not check upper bounds for the indexes
[SERVER-6513] - Solaris build failing on shard_gle_insert.js
[SERVER-6515] - slaveok query can fail early without trying the other nodes
[SERVER-6516] - Not much logging in outgoing mongos codepath
[SERVER-6522] - Background index builds on the primary are built in the foreground
[SERVER-6530] - disallow geo commands in aggregation
[SERVER-6532] - Add mongod.pdb to Windows .ZIP file
[SERVER-6533] - timeout waiting for replication in zbigMapReduce.js
[SERVER-6538] - Invalid access at address: 0x7f2e34021000 from thread: repl prefetch worker
[SERVER-6540] - queueing writebacks register with lastError too early
[SERVER-6549] - The correct password may auth fail occasionally.
[SERVER-6553] - Windows stack trace prints nothing if stack frames exceed maxBackTraceFrames
[SERVER-6554] - Windows unhandled exception filter should print stack trace
[SERVER-6556] - aggregation Value does not handle string values with null characters properly
[SERVER-6559] - db.runCommand with renameCollection causes mongod to crash
[SERVER-6561] - Link to SECURITY-1
[SERVER-6565] - Do not use primary if secondaries are available for slaveOk
[SERVER-6569] - queryOptimizerA fails on dur_passthrough
[SERVER-6570] - disallow $add with strings
[SERVER-6572] - Performance issue
[SERVER-6576] - Nondescript basicPlus.js failure in parallel test suite
[SERVER-6577] - capped collection _id index creation on secondaries not triggered by updates
[SERVER-6581] - mongos GLE needs to report errmsg when sub-GLE commands error on shard/shards
[SERVER-6582] - findandmodify doesn't set fields properly for getlasterror
[SERVER-6583] - "couldn't connect to new shard socket exception" in addshard4.js
[SERVER-6584] - slavedelay2.js fails with not all members ready
[SERVER-6588] - findAndModify regression 2.0.x -> v2.2.0rc0 with positional updates
[SERVER-6589] - Pretouch throws "11000:E11000 duplicate key error index" on every update
[SERVER-6593] - local ping time on nodes can take time to reach steady state
[SERVER-6596] - Secondary Acceptable Latency Threshold on mongos and mongo should match the drivers and the spec.
[SERVER-6598] - collection level userFlags not carried over across shards
[SERVER-6599] - crash on free of invalid pointer in shell parser
[SERVER-6601] - splitvector.js failing in multiVersion testing
[SERVER-6602] - loadserverscripts.js fails in multiVersion testing
[SERVER-6603] - Performance -- remove remapLock code from Windows build
[SERVER-6607] - can't read from replset member in capped_id.js
[SERVER-6609] - TTL collections can get out of sync too easily during replica set maintenance
[SERVER-6622] - could not insert into system.users in auth2.js
[SERVER-6623] - timing error in repl_monitor_stress.js
[SERVER-6624] - Read to invalid memory in Expression::parseOperand
[SERVER-6630] - mongooplog skips drop operations
[SERVER-6635] - mongodump --repair does not stop at extent boundaries
[SERVER-6636] - validate cmd reports wrong index is invalid
[SERVER-6647] - Potential out of bounds access in ReplicaSetMonitor
[SERVER-6648] - TTL monitor doesn't sync userFlags on the secondary
[SERVER-6659] - findAndModify errors when upserting on non-existent document and original query can't find doc
[SERVER-6679] - Value::coerceToString() for dates should use UTC rather than localtime
[SERVER-6684] - multi_mongos2.js SCE thrown in 2.0 mongod/2.2 mongos test
[SERVER-6685] - shard3.js fails strangely in 2.0 mongod/2.2 mongos
[SERVER-6688] - ExpressionNoOp / ExpressionConstant BSON round tripping issues
[SERVER-6690] - Relative path to pch.h not set
[SERVER-6693] - Copy-pasting multi-line strings with arrays does not work in shell
[SERVER-6702] - assertion in repl5.js
[SERVER-6704] - edit operation no longer shows syntax errors
[SERVER-6705] - 32-bit Windows hits access violation running test.exe (Buildbot)
[SERVER-6709] - Null pointer deref in ClientInfo::getLastError
[SERVER-6713] - 32-bit Windows builds should set the linker option /LARGEADDRESSAWARE
[SERVER-6729] - restrict database names only on Windows, for FAT32-invalid characters
[SERVER-6731] - cloneCollection warning inaccurate.
[SERVER-6740] - repl_monitor_stress.js failing
[SERVER-6741] - dbadmin.js failing
[SERVER-6742] - fileObj hashes not matching on insert in gridfs.js
[SERVER-6743] - perftest in /usr/bin/perftest
[SERVER-6744] - counts wrong in replreads.js on Nightly Linux RHEL 64
Improvement:
[SERVER-1654] - dbpath and logpath options in /etc/mongodb.conf are ignored in the Ubuntu
[SERVER-4683] - switch allocator - tcmalloc or jemalloc
[SERVER-5419] - Update rpm/mongo.spec file from packager.py output
[SERVER-6142] - ExpressionCompare::evaluate does not use Value::compare, does not handle heterogenous types (including numeric types) and some other comparison cases
[SERVER-6184] - mixing nested and dotted $project ExpressionObjects produces inconsistent results and assertions in some cases
[SERVER-6189] - Support date operators on dates before 1970
[SERVER-6197] - $avg is calculated using integer math for integers even though result value is of type double
[SERVER-6316] - collMod command should have better return reporting
[SERVER-6425] - remove $literal
[SERVER-6445] - collMod command unusable on sharded collection
[SERVER-6489] - Get rid of "cloud" command, and "dyn" host names.
[SERVER-6502] - Add support for QueryOption_Exhaust for find queries in benchRun
[SERVER-6529] - Don't allow inclusions inside of $expressions
[SERVER-6592] - improve FieldPath validation behavior
[SERVER-6597] - replace all \" with ' in aggro error messages
[SERVER-6708] - Make sh.addShard return something
[SERVER-6718] - option to disable index prefetching as part of multithreaded replication
New Feature:
[SERVER-6667] - --traceExceptions command line parameter
Question:
[SERVER-6166] - consider expanding to wider data type on math overflow
Task:
[SERVER-6361] - Disallow exclusion in $project for now
[SERVER-6472] - Make sure all agg tests work on a sharded collection
[SERVER-6677] - Add more test on read preference on the DBClientReplicaSet level

New in MongoDB 2.0.7 (Aug 10, 2012)

Bug:
[SERVER-2833] - mongod.exe does not shut down correctly as a Windows service
[SERVER-2942] - MapViewOfFileEx failed during large import
[SERVER-3097] - mongod --install uses wrong image path depending on current working directory
[SERVER-3969] - Shell interactive password prompt can't handle spaces
[SERVER-4291] - Assertion: 13273:single data buffer expected while using mongodump
[SERVER-4800] - mongos cursor handling with timeouts
[SERVER-4907] - sparse indexes break replication of array based operators
[SERVER-5473] - mongostat throws an error when connecting via a 1.8.x mongos - "unrecognized command: getnonce"
[SERVER-5594] - missed check of node index when initializing replica set with host down
[SERVER-5663] - Private pages accumulate in Windows RAM and page file when journaling
[SERVER-5680] - repl13.js failing on Windows 64-bit
[SERVER-5872] - autosplit would be triggered before data size touch chunksize. The return message "updatedExisting" of update is missed
[SERVER-5920] - bad reload of database config
[SERVER-5988] - where3.js leaving collections on slave at end of test in 2.0 branch
[SERVER-6006] - moveChunk fails with migration already in progress
[SERVER-6047] - $pullAll causes empty embedded object field to be created
[SERVER-6132] - a failure inside MakeChunkWritable should call abort/fassert instead of assert
[SERVER-6162] - backport of targeted shard ranges instead of broadcast on all queries
[SERVER-6167] - very verbose messaging with large numbers of collections
[SERVER-6178] - Cannot use mongos if subset of config servers can't read from or write to disk
[SERVER-6252] - Debug assertion in Windows debug build, bad code in any build, due to incorrect lock usage
[SERVER-6305] - option to turn off splitVectors on particular mongoses
[SERVER-6311] - FlushViewOfFile failures can result in invalid journal on Windows
[SERVER-6359] - mongoexport now outputs full strings in CSV mode
[SERVER-6372] - fassert identifier causes Windows 64bit 2008+ to fail compile in 2.0 branch
[SERVER-6391] - Yielding with one (or more) active writer and heavy read load results in severe performance degradation
[SERVER-6509] - ignore SIGPIPE
[SERVER-6512] - ReplicaSetMonitor::_checkConnection does not check upper bounds for the indexes
Improvement:
[SERVER-4992] - Disable dropDatabase command on "config" if sharded collections exist with data
[SERVER-6414] - use regular file io, not mmap for external sort

New in MongoDB 2.2.0 RC (Jul 20, 2012)

Bug:
[SERVER-3893] - fail to compile mongo with --ssl=SSL on fedora core 15
[SERVER-4225] - Adding first admin user to database via localhost works but returns error message
[SERVER-4674] - aggregation: treat undefined values the same as null values
[SERVER-5101] - Test failure in closeall.js
[SERVER-5484] - Aggregation should filter out docs not belonging to current shard.
[SERVER-5633] - 'mongo' on Solaris aborts on startup
[SERVER-6047] - $pullAll causes empty embedded object field to be created
[SERVER-6077] - Build times out compiling queryoptimizertests.cpp on OS X 32-bit
[SERVER-6111] - Build fails with "Implicit dependency not found"
[SERVER-6117] - SlaveOk Query fails with auth error even after logging in
[SERVER-6118] - aggregation returns incorrect results for sharded sorts
[SERVER-6123] - aggregation holds read lock indefinitely without yielding after initial processing of first sort or group stage
[SERVER-6128] - Process taking too long to kill in features3.js
[SERVER-6143] - verify assertion on attempt to perform date extraction from missing or null value
[SERVER-6147] - aggregation $ne expression applied to constant returns incorrect result
[SERVER-6158] - Windows builds link client examples against previous mongoclient.lib
[SERVER-6165] - use of an integer valued double with a $mod expression can produce an incorrect result
[SERVER-6178] - Cannot use mongos if subset of config servers can't read from or write to disk
[SERVER-6186] - $substr expression does not check arguments, can trigger an out_of_range exception causing mongod to abort
[SERVER-6204] - make $pullAll more efficient
[SERVER-6208] - ttl seg fault
[SERVER-6214] - Race condition where member gets stuck in startup and doesn't sync
[SERVER-6222] - Mongo crashes if query for collection in new db
[SERVER-6226] - findAndModify return value inconsistent between 2.0.x and 2.1.2 when using upsert
[SERVER-6228] - Duplicate key error causes secondaries to fassert() and crash
[SERVER-6229] - not so rare verbose log message: info journal _rotate called inside dbMutex - ok but should be somewhat rare
[SERVER-6230] - intermittent connection refused errors in app opening new connections
[SERVER-6231] - os x - startup warning - maxproc - hard limit of 1024
[SERVER-6232] - seg fault when providing an empty object as an expression argument
[SERVER-6242] - Test breaks in 2.1.2 but passes in 2.1.1
[SERVER-6244] - Mongo shell in Windows doesn't display Unicode when console is set to Terminal font
[SERVER-6248] - no mongoclient target as described in docs/building.md
[SERVER-6249] - sort1.js failed in debug testing
[SERVER-6254] - FindAndModify throw exception if new:true is set
[SERVER-6265] - Unhide --locks option for mongotop
[SERVER-6266] - mongotop reports different lock times with --locks than without
[SERVER-6269] - DocumentSourceUnwind does not implement the DocumentSource iterator interface correctly
[SERVER-6270] - attempt to return an aggregation result that is too large results in double exceptions and terminate() aborting mongod
[SERVER-6284] - $where is broken in 2.1.2 findAndModify
[SERVER-6285] - Lock reporting in slow query log messages isn't reset after each operation
[SERVER-6289] - BackgroundJobTests failing on faster buildslaves
[SERVER-6303] - shouldRetry needs a write lock
[SERVER-6305] - option to turn off splitVectors on particular mongoses
[SERVER-6309] - timeout waiting for replication in groupAndMapReduce.js
[SERVER-6311] - FlushViewOfFile failures can result in invalid journal on Windows
[SERVER-6314] - collMod command has no help documentation
[SERVER-6315] - tagSet suite test failure on debug builds
[SERVER-6318] - GLE with auth failing in authCommands2.js
[SERVER-6320] - SSL Options Not listed in --help output for mongod/mongos
[SERVER-6321] - Bad path to SSL key file or incorrect password causes: Assertion: 15868 :Can't read key file
[SERVER-6322] - Unbalanced read load on secondaries caused replRead.js in slowNightly to fail
[SERVER-6324] - ServerName incorrect when walking the MIB on Enterprise Build
[SERVER-6334] - ReplSet connections magically gets reauthenticated after logging out
[SERVER-6335] - aggregation framework: disallow $where in $match
[SERVER-6340] - TIME_UTC is a macro in C11, compilation of lines, containing boost::TIME_UTC will fail with glibc 2.16
[SERVER-6341] - Large number of databases causes seg fault in mongotop
[SERVER-6342] - indexes in sharding configuration
[SERVER-6343] - Test for grouping by tag fails in aggregation/testall.js
[SERVER-6351] - Make mongostat adjust column width for variable length field "db locks"
[SERVER-6355] - Subscription build failing to compile
[SERVER-6359] - mongoexport now outputs full strings in CSV mode
[SERVER-6363] - auth_slaveok_routing.js failing all over
[SERVER-6366] - --noOptionsRestore flag has no affect on mongorestore
[SERVER-6367] - Windows build fails on jsobjtests
[SERVER-6373] - Uncaught exception in new auth_repl.js tests
[SERVER-6390] - mongooplog arguments are unclearly documented, some irrelevant?
[SERVER-6397] - moveChunk fails because metadata collection could not be locked
[SERVER-6419] - Linux_64bit_Subscription_Amazon_AMI_Nightly failing build with pymongo not found
[SERVER-6422] - replication initial sync retry may abort
[SERVER-6438] - Unrecognized command "collMod" in use_power_of_2.js
[SERVER-6441] - Assertion failure in bsonobjbuilder.h
[SERVER-6442] - memory error in smoke test
[SERVER-6447] - Cursor iteration performance regression
[SERVER-6449] - TIME_UTC_ does not compile in C++ driver
[SERVER-6460] - replset1.js fails after waiting for oplog to be built on secondaries
[SERVER-6461] - Get Solaris build working
[SERVER-6479] - Seg fault in explain3.js
[SERVER-6480] - Seg fault in count8.js
[SERVER-6481] - Invalid write to a deleted ClientCursor after yield recovery fails
[SERVER-6482] - Parallel test basicPlus.js failing
[SERVER-6483] - Socket exception in zbigMapReduce.js
[SERVER-6486] - invalid reconfig in replsettest
Improvement:
[SERVER-3358] - sharding - tagging - use for reading from secondaries
[SERVER-3643] - dropdups replication corner cases
[SERVER-3836] - Writes will be slow on replicated capped collections
[SERVER-4644] - aggregation: optimize memory utilitzation by selective reification of documents
[SERVER-6119] - DocumentSourceCursor does not yield before loading first cursor document
[SERVER-6120] - Value::coerceToBool is inconsistent with javascript in some cases
[SERVER-6121] - aggregation framework converts Timestamp to long long in result set
[SERVER-6122] - aggregate command writes results 3 times
[SERVER-6127] - $project uasserts if an expected nested field has a non object parent in any source document
[SERVER-6131] - decide on behavior to $unwind an empty array
[SERVER-6163] - value in a $literal expression can trigger an expression parse assertion causing an aggregation to fail
[SERVER-6190] - $week operator does not conform to spec when first day of the year is a sunday
[SERVER-6201] - temporary insertion of a non compliant ttl index causes ttl thread to abort and ttl to stop working
[SERVER-6240] - Disable math with Dates in agg
[SERVER-6256] - Write BSONType::name() and use in aggregation error messages
[SERVER-6268] - report both winning plan nscanned and total nscanned in explain output
[SERVER-6278] - balancing option for doing w=2 after each write op
[SERVER-6280] - Value::createFromBsonElement() should use ValueStatic where possible.
[SERVER-6281] - waitTime should be waitTimeMs (or waitMs)
[SERVER-6288] - Initialize repl network queue counters
[SERVER-6344] - Typo in help output for SSL builds (shell and tools)
[SERVER-6409] - PageFaultException for insert
[SERVER-6414] - use regular file io, not mmap for external sort
[SERVER-6416] - compute field ranges for singleton $or clauses
[SERVER-6426] - switch multithreaded replication batching to use a byte limit rather than a op limit
Task:
[SERVER-6290] - Remove $isoDate aggregation expression operator

New in MongoDB 2.1.2 Development (Jun 27, 2012)

Bug:
[SERVER-1470] - Update w/upsert ignores dbref field from query on insert
[SERVER-1877] - Using single hyphen for install parameter will install un-startable Windows service
[SERVER-2291] - count command returns zero in some error cases rather than reporting an error with ok:false
[SERVER-2639] - Inserting into a capped collection an object larger than max size fails silently
[SERVER-2659] - query_yield2 failure
[SERVER-2942] - MapViewOfFileEx failed during large import
[SERVER-3100] - MongoDB often does not shut down cleanly when using init script
[SERVER-3620] - test (dbtests) fails with pthread assertion
[SERVER-3639] - --repair fails if mongodb.lock file exists (and has data) if journaling on (but there are no journal files)
[SERVER-3877] - Solaris 1.8.2 mongo Doesn't Parse Username and Password Options Correctly
[SERVER-3918] - make sparse indexes error out on {$exists: false} queries
[SERVER-4027] - Accept geo points equal to 180 (or specified max)
[SERVER-4138] - Mongo crashes in windows if database name is a reserved file name
[SERVER-4142] - mongod.exe on Windows -- Source files in SCons build but not in Visual Studio project
[SERVER-4262] - when dropping collections need to invalidate all conn sharding state
[SERVER-4372] - Creating a DB with a name containing a colon creates two DBs
[SERVER-4439] - Replica set members shouldn't sync from a node that is very behind
[SERVER-4476] - mongod's cached data should be refreshed on removeShard
[SERVER-4505] - Don't assume old primary is still primary when no nodes are returning isMaster
[SERVER-4581] - Mongos and mongod keep trying to reconnect to removed shard
[SERVER-4726] - Spurious warning: ClientCursor::yield can't unlock b/c of recursive lock during --repair
[SERVER-4732] - potential segfault on full config reload during wbl if collection is dropped / unsharded but still receives writebacks
[SERVER-4758] - OplogReader has no socket timeout
[SERVER-4800] - mongos cursor handling with timeouts
[SERVER-4811] - OID increments can overflow for a given time period
[SERVER-4972] - mongorestore on server with --auth allows restore without credentials of colls with no index
[SERVER-5000] - Connection count is not in sync with the connection thread name
[SERVER-5040] - Cloner can fail to create unique indexes on initial sync
[SERVER-5056] - Server cannot automatically recover if it terminates during recovery
[SERVER-5101] - Test failure in closeall.js
[SERVER-5124] - authentication seems to intermittently fail after adding/removing a shard
[SERVER-5198] - incorrect assumptions in write operations using cursors
[SERVER-5200] - slowNightly tests failing on sharding_balance4.js
[SERVER-5230] - HostAndPort::me() should use bind_ip
[SERVER-5233] - Mongodump stdout not working with authentication
[SERVER-5240] - mongos fails to connect to active cluster with config hosts down
[SERVER-5243] - mongos will route getLastError command to the config server when last insert triggered a split
[SERVER-5258] - RS manager can demote current primary without any log messages or closing connections
[SERVER-5283] - other threads can see partially sharded chunkmanager
[SERVER-5304] - initial sync fails to create index on capped collection
[SERVER-5393] - Killing mongod during a repair can leave it unable to start up
[SERVER-5428] - count8.js failing on Nightly RHEL build
[SERVER-5441] - Mongo shell "getlasterror" does not return "updatedExisting" via mongos
[SERVER-5473] - mongostat throws an error when connecting via a 1.8.x mongos - "unrecognized command: getnonce"
[SERVER-5485] - implement thread safety for shell utils, using fine grained locking
[SERVER-5494] - Changes to benchrun causing failure in bench_test1.js
[SERVER-5511] - Junk strings in listCommand help text?
[SERVER-5536] - 2.0/2.1 sharded mapReduce compatibility
[SERVER-5538] - legacy (2.0) staleconfigexceptions can be thrown w/o namespace, 2.1 needs to handle
[SERVER-5545] - DurableImpl::commitIfNeeded and dur.cpp's _groupCommit are not sufficiently aggressive
[SERVER-5552] - adding an index while an update operation yields can result in incorrect index key entries
[SERVER-5556] - Error 8070 should be an massert not a uassert
[SERVER-5570] - Killing of 'count' query cause incorrect behavior
[SERVER-5597] - Windows implementation of toWideString in text.cpp is incorrect.
[SERVER-5616] - Any shell command containing the string ".auth" is not added to shell history
[SERVER-5624] - mongos does not respect notimeout for cursors
[SERVER-5627] - mongodb hangs when doing mapreduce
[SERVER-5643] - keyfile documentation is incorrect in mongod help
[SERVER-5649] - Initial sync of capped collection does not create _id index
[SERVER-5670] - externally preallocated data files may be ignored when allocating extents
[SERVER-5693] - invalid system_js function will cause mongodb server crash.
[SERVER-5698] - "assert failed : reconfig worked" in fastsync.js
[SERVER-5720] - GridFS::setChunkSize rejects all sizes but 0
[SERVER-5740] - index bounds may be incorrectly determined for $not:$elemMatch queries
[SERVER-5741] - nested $elemMatch queries are not handled in queryutil, trigger "warning: shouldn't get here?" log message
[SERVER-5742] - bigMapReduce.js failing b/c of migrate deletion during m/r
[SERVER-5746] - Wrong initialization for ReplicaSetMonitor Nodes
[SERVER-5748] - mongo/platform folder missing after c++ client driver installation
[SERVER-5750] - assert in server5012.js
[SERVER-5764] - Multi-line mode in the shell went away
[SERVER-5772] - assert in query_yield2.js
[SERVER-5785] - balancer isOverlapping() check is failing
[SERVER-5791] - SConstruct failing to find os.environ['HOME']
[SERVER-5796] - HexData undocumented, crashy
[SERVER-5797] - Uncaught exception in count_slaveok.js
[SERVER-5805] - Fatal Assertion 16213 in fsync.js
[SERVER-5817] - scons error in 32-bit RHEL build
[SERVER-5819] - Use FileAllocator on Windows
[SERVER-5825] - "No module named hashlib" in utils.py
[SERVER-5842] - Exceptions thrown in scripting/engine_spidermonkey.cpp need to be handled there
[SERVER-5844] - mongos cursors return the wrong value for startingFrom
[SERVER-5852] - freebsd 64-bit backtrace segfaults
[SERVER-5856] - make query optimizer code not access data in constructor
[SERVER-5867] - Cannot use SRWLocks on Windows Server 2003
[SERVER-5872] - autosplit would be triggered before data size touch chunksize. The return message "updatedExisting" of update is missed
[SERVER-5876] - user authentication should retry on primary
[SERVER-5883] - duplicate key error in replset7.js
[SERVER-5885] - center query update asserting in geo_full.js
[SERVER-5886] - initial_sync3.js bb failure with "not master"
[SERVER-5891] - TTLMonitor complains with --auth
[SERVER-5895] - auth.js times out waiting for user authentication to replicate
[SERVER-5898] - uncaught exception in mr_shard_version.js
[SERVER-5918] - invalid memory writes in sharding test suite
[SERVER-5920] - bad reload of database config
[SERVER-5924] - Implicit yield reporting in MultiCursor::recoverFromYield() can overstate the yield count if the cursor's current() document is deleted during a yield.
[SERVER-5926] - Segfault when procesing a command with empty namespace
[SERVER-5935] - count8.js sharding_passthrough tests
[SERVER-5936] - assertion (fassert) may be triggered by exact match geo lookup with $or
[SERVER-5940] - error in remove1.js
[SERVER-5941] - Failure in count6.js during sharding_passthrough
[SERVER-5942] - benchRun unable to find all config servers during mr_during_migrate.js
[SERVER-5948] - replSet member can fall out of RECOVERING back into SECONDARY even if no other node in the set can be authenticated against.
[SERVER-5950] - assert in repl13.js
[SERVER-5959] - Mongod crashes with access denied if you spawn multiple shells inserting in quick succession
[SERVER-5962] - "TypeError: result.remaining has no properties" in auth_add_shard.js
[SERVER-5963] - exception cloning object in replset7.js
[SERVER-5968] - geo_update_btree.js never completes, in debug mode only
[SERVER-5970] - QueryOptimizerCursorTests core test failure in Linux debug mode
[SERVER-5971] - replication timeout in replsets_priority1.js
[SERVER-5973] - Aggregation $sort should correctly handle dates before 1970
[SERVER-5986] - fsync deadlock issues
[SERVER-5993] - fsync_lock_read_secondaries.js fails on sharding_passthrough
[SERVER-5995] - capped collection has different hash on master/slave at end of where4.js
[SERVER-5996] - "uncaught exception: map reduce failed" in zbigMapReduce.js
[SERVER-5999] - page fault exception in ClientCursor::aboutToDelete() can leave another Cursor / ClientCursor in an inconsistent state
[SERVER-6001] - key matching is not handled properly for the $elemMatch operator
[SERVER-6003] - Query optimizer failure in core tests on linux 32-bit debug
[SERVER-6006] - moveChunk fails with migration already in progress
[SERVER-6020] - Exception in MongoMutexTest on Windows 32-bit
[SERVER-6021] - Need to make more constructors not access data
[SERVER-6022] - test failure in cursora.js
[SERVER-6031] - read only user can get write priority
[SERVER-6034] - OS X failing to build with "invalid character '%' in mnemonic" on atomic_word_test
[SERVER-6044] - "not enough storage is available" for MapViewOfFileEx
[SERVER-6045] - aggregate cmd crashes server with empty pipeline argument
[SERVER-6053] - query safety with PageFaultException
[SERVER-6061] - Null pointer dereference segfault in mongo shell
[SERVER-6073] - WIndows service installation hits assertion failure in src\mongo\db\client.h(262)
[SERVER-6077] - Build times out compiling queryoptimizertests.cpp on OS X 32-bit
[SERVER-6082] - "process cannot access the file" in remove2.js
[SERVER-6089] - balancer error in mrShardedOutput.js
[SERVER-6090] - uncaught exception in auth_add_shard.js
[SERVER-6091] - Uncaught exception in sync_passive2.js
[SERVER-6092] - chunks not balanced at end of no_balance_collection.js
[SERVER-6094] - sharding/remove2.js has cleanup issues at end of test, fails on Linux but blows up test on Windows
[SERVER-6103] - test failure in counttests.cpp
[SERVER-6114] - Windows compile failing with unresolved external symbols
[SERVER-6116] - buildbot zbigMapReduce.js counts failing in mapreduce
[SERVER-6130] - Replication timeout in moveprimary-replset.js
[SERVER-6132] - a failure inside MakeChunkWritable should call abort/fassert instead of assert
[SERVER-6133] - flushing connection pool can leak connections
[SERVER-6154] - failure in authCommands2
[SERVER-6155] - stale config server in sort1.js
[SERVER-6160] - TypeError in replsets/auth1.js
[SERVER-6164] - connection logging sometimes has no numbers
Improvement:
[SERVER-1506] - when sharding on a and need an index on a,b allow only a,b index
[SERVER-2023] - touch command to pre-heat a collection
[SERVER-2187] - Mongorestore should warn more
[SERVER-2545] - multi data center support via location aware sharding
[SERVER-2939] - Support Unicode fully in the Mongo shell (was "Linenoise UTF8 support")
[SERVER-3062] - Read from the nearest slave
[SERVER-3102] - invalidate querypattern when index becomes multikey
[SERVER-3356] - disk/yield lock - initial query
[SERVER-3636] - not in mem yielding for single doc delete
[SERVER-3735] - Reload settings every pass through the balancer loop
[SERVER-3746] - Support sharding GridFS on {files_id:1, n:1}
[SERVER-4156] - fix read only user support with sharding
[SERVER-4180] - Allow multiple constraints within a $elemMatch clause to be used with a multikey index
[SERVER-4392] - split network thread out from worker thread for secondaries
[SERVER-4407] - Log warnings on startup if (hard) rlimits are no good
[SERVER-4988] - printStackTrace on Windows
[SERVER-4992] - Disable dropDatabase command on "config" if sharded collections exist with data
[SERVER-5046] - per collection option to pad to power of 2
[SERVER-5083] - Include database name in auth log message
[SERVER-5246] - Move linenoise out of third_party
[SERVER-5459] - Add rs.syncFrom() helper
[SERVER-5468] - sslPEMKeyPassword Should not be visible in logs and similar
[SERVER-5475] - use chunk diffs instead of full chunk data reload in mongod and mongos
[SERVER-5492] - Complete serverStatus in FreeBSD
[SERVER-5648] - Improved support for native AtomicUInt64
[SERVER-5658] - Add more debugging info to applyOps code path
[SERVER-5706] - If only slaveDelay'd nodes are available, use them
[SERVER-5784] - Record all btree stats (stop sampling)
[SERVER-5790] - sharding_rs2.js failing during slowNightly tests
[SERVER-5863] - Have mongod --help show default values
[SERVER-5912] - Error message for too-long line in mongoimport is unclear
[SERVER-5934] - rewrite chunk delete
[SERVER-5977] - switch from list.sort() to sort(vector)
[SERVER-6019] - stats for PageFaultException
[SERVER-6023] - add an explicit requireOrder argument to NamespaceDetailsTransient::getCursor()
[SERVER-6039] - make ShardChunkManager not use data in constructor
New Feature:
[SERVER-211] - TTL collections
[SERVER-828] - Support for positional ($) operator in fields to return specifier
[SERVER-2238] - New projection operator $elemMatch
[SERVER-4632] - Display "Welcome to MongoDB" message first time a user runs mongo shell
[SERVER-5458] - --nohttpinterface option on mongos
[SERVER-5685] - Have multiple threads applying oplog ops
[SERVER-5777] - Add support for a range constraint on the first sort field to in/sort/limit optimization
[SERVER-5782] - need a $literal operator to help prevent injection attacks
[SERVER-5861] - Support a richer templating language in benchRun
[SERVER-5903] - pass limit to sharded count
Task:
[SERVER-5902] - check fileMD5 failure for count() problems
Sub-task:
[SERVER-4628] - good lock state reporting with the more granular locking
[SERVER-5794] - mongod should not check minor version on new connections