4.2 Changelog
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4.2.19 Changelog
Sharding
SERVER-26755 Collection chunk loading is aborted entirely if fetching all the chunks takes more than 30 seconds
SERVER-45149 replSetStepDown command in txn_two_phase_commit_failover.js should not timeout
SERVER-53335 Queries, updates, and deletes with non-"simple" collations may miss documents when using hashed sharding
SERVER-59929 unexpected slower update/insert operation bease of splitchunk and moveChunk
SERVER-60682 TransactionCoordinator may block acquiring WiredTiger write ticket to persist its decision, prolonging transactions being in the prepared state
SERVER-61816 cancel_coordinate_txn_commit_with_tickets_exhausted.js can hang forever due to race condition between transaction reaper and transaction coordinator
SERVER-61924 retryable_mongos_write_errors.js fails in 4.2 multiversion suites due to missing failpoint command in 4.0
SERVER-62065 Upgrade path from 3.6 to 4.0 can leave chunk entries without history on the shards
SERVER-62739 cancel_coordinate_txn_commit_with_tickets_exhausted.js test should not be run with the ephemeral storage engine
SERVER-62906 Add a check in the createCollection/shardCollection path verifying the collection name length
Query
SERVER-23664 $mod match expression should raise an error when the remainder is not a number
SERVER-40691 $nin:[[],...] queries are not indexed
SERVER-57588 Inconsistent query results when an array position is indexed whose value is an array
SERVER-59754 Incorrect logging of queryHash/planCacheKey for operations that share the same $lookup shape
SERVER-62147 Exhaust query using the OP_QUERY protocol is broken when more than one getMore batch is required
Aggregation
SERVER-44484 Changestream with updateLookup uasserts on updates from before collection was sharded
Storage
SERVER-55483 Add a new startup parameter that skips verifying the table log settings
Internals
SERVER-51087 Add testing utility for creating an empty sharded collection with the specified bounds
SERVER-53726 Platform Support: Remove RHEL6 zSeries
SERVER-57312 Pin transitive Python dependencies and use the pinned file for installation in Evergreen
SERVER-60392 Fix timing in priority_takeover_two_nodes_equal_priority test.
SERVER-60685 TransactionCoordinator may interrupt locally executing update with non-Interruption error category, leading to server crash
SERVER-61662 SCons configure checks should always run with verbosity
SERVER-61743 The -fno-builtin-memcmp flag shouldn't be applied except on x86_64 platforms
SERVER-62005 [4.2] Add requires_document_locking to unique_index_insert_during_collection_scan.js
SERVER-62164 Remove several obsoleted build variants across all stable branches
SERVER-62320 (v4.2) Fix use after std::move in find command
SERVER-62668 Synchronize access to ImpersonatedUserMetadata in OperationContext.
SERVER-62825 Robustify causally_consistent_index_builds.js
SERVER-63197 Pin microbenchmarks genny version
SERVER-63203 Chunk splitter never splits if more than 8192 split points are found
WT-7993 If gathering handles and not in aggressive eviction mode, have eviction sleep to let checkpoint grab a contentious spinlock.
4.2.18 Changelog
Sharding
SERVER-48504 Combination of StaleShardVersion and ShardNotFound exception make the ChunkManagerTargeter crash
SERVER-54064 Sessions on arbiters accumulate and cannot be cleared out
SERVER-54623 Decrease number of jobs in causal consistency passthrough suites
SERVER-56226 [v4.4] Introduce 'permitMigrations' field on config.collections entry to prevent chunk migrations from committing
SERVER-56227 Add user-facing command to set allowMigrations to false for a sharded collection
SERVER-58985 Re-enable retryable_mongos_write_errors.js in multiversion suite once SERVER-55648 is backported to v4.0
SERVER-59160 Disable balancer in test_stacked_migration_cleanup.js
SERVER-59916 T{1, 2}Starts{First, Second}AndWins In WriteConflictHelpers Does Not Synchronize Committing Of Failed Transaction
SERVER-60653 Backport the autoSplitVector logic to v4.2
Replication
SERVER-50241 PeriodicShardedIndexConsistencyChecker should skip dropped collections
SERVER-56096 Invariant failure in ReplicationRecoveryImpl::recoverFromOplog
SERVER-58988 Avoid sync source selection cycle during primary catchup.
Aggregation
SERVER-59613 $range expression should error if it exceeds memory limit
Storage
SERVER-45953 Exempt oplog readers from acquiring read tickets
Operations
SERVER-28953 Capture df (disk full) statistics in FTDC
SERVER-53242 Always log collmod command
Internals
SERVER-52976 [4.2] collection_validation.cpp isn't used anywhere in the 4.2 branch
SERVER-53726 Platform Support: Remove RHEL6 zSeries
SERVER-55589 replSetMaintenance command does not take the RSTL
SERVER-56326 Add a round() method to the Decimal128 class
SERVER-56602 Track usage of match expressions in serverStatus
SERVER-57557 [v4.4] Support running checkFCV() shell helper with mongos connection
SERVER-57605 Expose Decimal128 equality comparison helper to shell
SERVER-58104 config.system.sessions collection can end up with invalid chunks if it is dropped and re-sharded with a shard key other than _id
SERVER-58119 single_node_set_new_hostname.js needs to call replSetReconfig with an assert.soonNoExcept
SERVER-58183 _applyPrepareTransaction does not ensure prepareConflictBehavior is kIgnoreConflictAcceptWrites on retry attempts
SERVER-58192 Use more unique_ptrs in QueryPlannerAnalysis::analyzeSort()
SERVER-58780 [v4.4] Ensure that _shouldSetStableTimestamp gets restored to true if replSetInitiate fails
SERVER-59108 Resolve race with transaction operation not killed after step down
SERVER-59120 Create unit tests for commitChunksMerge
SERVER-59191 SPIKE: git.get_project fails to clone
SERVER-59226 Deadlock when stepping down with a profile session marked as uninterruptible
SERVER-59294 Check action type for oidReset
SERVER-59459 mongodb fails to build with glibc-2.34
SERVER-59725 Remove push task from extra RHEL 6.2 variants
SERVER-59804 Using a separate branch for YCSB in system_perf.yml
SERVER-59879 Adjust maxTimeMS value to allow for slower execution in the parallel test suite
SERVER-60080 [v4.2] Disable tests incompatible with ephemeralForTest
SERVER-60085 Cap number of fallback test suites at number of tests in suite
SERVER-60149 Add RRFaM build variant to mongocryptd list on v4.2 branch
SERVER-60290 Update Windows external auth test distro
SERVER-60299 Backport PCRE bugfix for Bugzilla #2613
SERVER-60456 LDAPBindOptions go out of scope during heavily delayed binds on Windows
SERVER-60496 Resmoke Misinterprets Quotes In Evergreen.yml
SERVER-60582 [v4.4] initiate_emrc_false.js needs to wait for the initial checkpoint
SERVER-60588 $multiply incorrectly throws an error in some cases in the classic engine
SERVER-60670 use a separate branch instead of a specific commit for TPCC
SERVER-60671 Remove dagger
SERVER-60897 [4.2] mongod may loop forever when attempting to upsert invalid BSON
SERVER-60898 [v4.2] Exclude stepdown_race_with_transaction.js from running on ephemeralForTest
SERVER-60961 Add exclude tags to old branches not generating multiversion_exclude_tags.yml
SERVER-60971 Remove calls to BF suggestion service
SERVER-61164 Accept error code 48 (Inappropriate authentication) as a valid response for LDAP liveness check
SERVER-61427 Unique index builds can cause a loss of availability during commit due to checking many false duplicates
SERVER-61544 [4.2] Fix exclusion tag for stepdown_race_with_transaction.js
SERVER-61550 Modify auto_workload_path in perf.yml to be relative to cwd
SERVER-61791 pin pymongo
WT-7566 Resolve write after free for dead dhandle
WT-7858 Fix malloc writing out of bounds for overflow keys
WT-7984 Fix a bug that could cause a checkpoint to omit a page of data
4.2.17 Changelog
Storage
SERVER-49521 fix tests in core/txn to use write concern "majority" for createIndexes commands run before starting transactions
Internals
SERVER-48090 Support python 3.6 for evergreen.py and shrub.py
SERVER-50549 Transform connection-related error codes in proxied commands
SERVER-53726 Platform Support: Remove RHEL6 zSeries
SERVER-59456 Start the LDAPReaper threadpool
SERVER-59876 Large delays in returning from libcrypto.so while establishing egress connections
4.2.16 Changelog
Security
SERVER-57727 Race conditions in x509_invalid.js
Sharding
SERVER-55648 Mongos doesn't return top-level batch-write error in case of shutdown
SERVER-58909 Missing versions for "admin" and "config" databases migrating to version 4.2
Replication
SERVER-34938 Secondary slowdown or hang due to content pinned in cache by single oplog batch
SERVER-36263 Bypassing operation validation in applyOps should require special privilege
SERVER-37904 Allow a node to override the cluster chaining (enabled/disabled) setting
SERVER-39621 Disabled chaining should enforce sync source change when the primary steps down even if the oplog fetcher isn't killed on sync source
SERVER-41875 Should ban "emptyCapped" commands on jstestfuzz_concurrent_replication_continuous__stepdown suite for WiredTiger Storage.
SERVER-50486 invokeWithSessionCheckedOut being called on prepared transactions on secondaries
SERVER-55465 Fix Invariant upon failed request for a vote from the current primary in the election dry-run of catchup takeover
SERVER-58258 Wait for initial sync to clear state before asserting 'replSetGetStatus' reply has no 'initialSync' field
Query
SERVER-55319 [4.2] Invariant failure isVersionInitialized() src/mongo/db/server_options.h 217 after index build completes
SERVER-58127 Fix benchRun() memory leak for parsing benchRun() args under exception
Build and Packaging
SERVER-54729 MongoDB Enterprise Debian/Ubuntu packages should depend on libsasl2-modules and libsasl2-modules-gssapi-mit
Internals
SERVER-49237 Add a way for OperationContexts to opt-in to always getting interrupted at stepdown
SERVER-50547 Explore aggregation pipeline length limit
SERVER-52728 Upgrade path from MongoDB 2.4 to 4.2 causes config servers to go down
SERVER-53431 Server should respond running operations with appropriate topologyVersion on stepdown
SERVER-53726 Platform Support: Remove RHEL6 zSeries
SERVER-55649 Sharding messages being logged for non-sharded clusters
SERVER-56489 New pass-through test with random hello server-side delays
SERVER-56516 Fix undefined behaviour in parsing code for $slice projectional operator
SERVER-56839 Index seeks concurrent with recently-committed prepared transactions can return wrong results
SERVER-57033 The AuthorizationManager Cache in 4.2 should use roles as cache key
SERVER-57064 Log create index and dropIndex(es) on mongos
SERVER-57360 Log additional debug info for the "invariant (_requests.empty());" in ~LockerImpl
SERVER-57642 Invariant Failure on src/mongo/db/query/plan_yield_policy.cpp 75 | Aborting
SERVER-57650 Make MigrationChunkClonerSource interruptible when waiting response to recipient commands
SERVER-57798 Direct user to MongoDB Compass download page when failing to install MongoDB Compass due to a connection issue using ./install_compass
SERVER-57983 Integer overflow for $range in Classic Engine
SERVER-58169 Log timestamps info on hitting invariants around stable timestamp calculation
SERVER-58187 Improve Connection Reaper and MongoLDAP performance
SERVER-58191 [Migrate Protocol] Allow delete_during_migrate.js to tolerate chunk migration failures due to timeout in catchup phase in slow variants.
SERVER-58283 Add a new versioning file to set MONGO_VERSION and MONGO_GIT_HASH
SERVER-58313 Fix package test failure caused by SERVER-55460 backport to v4.2 and v4.0
SERVER-58402 Increase timeout of shutdown command in shutdown_primary.js
SERVER-58623 Shorten the mongos RSM refresh interval in delayed Hello tests
SERVER-58826 [4.2] Disallow compact_keeps_indexes.js and explain_shell_helpers .js to run concurrently on parallel suite
SERVER-59074 Do not acquire storage tickets just to set/wait on oplog visibility
SERVER-59135 Make mongocryptd targets in MSIs depend on libsasl2
SERVER-59197 Delete fam image entries when the corresponding session documents are deleted
SERVER-59242 update to snmp 5.9.1
SERVER-59262 Remove burn_in_tests tasks from storeFindAndModifyImagesInSideCollection build variants
SERVER-59388 Revert BACKPORT-10185
SERVER-59414 Retry curator setup in powercycle on older branches
WT-6568 Fix split generation use
WT-6926 Update WiredTiger source code to include 2021 copyright notices
WT-7065 Add check for WT_DHANDLE_DEAD to assertion
WT-7135 Additional checks to detect when writing corrupted metadata
WT-7437 Upgrade documentation to doxygen 1.8.17
WT-7675 Query last ckpt timestamp changes without taking checkpoint
WT-7721 Update test-format to reopen an existing database with different config
WT-7776 Add a hard limit on the number of modify updates before we instantiate a complete update
WT-7871 Remove comment that is no longer true
4.2.15 Changelog
Security
SERVER-56240 Turn on checkpointing for the keystore Data Store
Sharding
SERVER-46811 multi=true updates can modify the shard key of orphan documents and cause them to become owned
SERVER-47534 Unblacklist mongos_dataSize.js from sharding_last_stable_mongos_and_mixed_shards suite
SERVER-47699 Change yield type used by range deleter from YIELD_MANUAL to YIELD_AUTO
SERVER-48648 Return updated ShardVersion in _configsvrCommitChunkMerge to avoid blind metadata refresh
SERVER-48653 Return updated ShardVersion in _configsvrCommitChunkSplit to avoid blind metadata refresh
SERVER-51170 Ensure database refreshes are performed after ShardingState initialization
SERVER-53029 Port the changes for SERVER-52955 to later branches
SERVER-56515 Chunk merge doesn't consider the incrementChunkMajorVersionOnChunkSplits parameter
SERVER-56654 Do not use the collection distributed lock for chunk splits
SERVER-56779 Do not use the collection distributed lock for chunk merges
SERVER-56786 There are three routing info refreshes and two chunk scans on the mergeChunks path
SERVER-57009 Additional debugging information in case of crash during FCV change
SERVER-57055 delete_during_migrate.js is consistently failing in test suites with Code Coverage enabled
SERVER-57102 Fixing invariants on ShardServerCatalogCacheLoader to consider different terms
SERVER-58109 The new '_configsvrMergeChunks' path is more expensive than the old one
Replication
SERVER-44316 Log message in InitialSyncer for setting begin applying timestamp is incorrect
SERVER-45919 replSetReconfig should be allowed to fail with InterruptedDueToReplStateChange when racing with an election
SERVER-53447 Blacklist insert1.js with from transaction passthrough tests with failures
SERVER-55465 Fix Invariant upon failed request for a vote from the current primary in the election dry-run of catchup takeover
SERVER-55766 Introduce an optimized "for restore" startup replication recovery mechanism
SERVER-56054 Change minThreads value for replication writer thread pool to 0
SERVER-56415 AwaitNodesAgreeOnPrimary doesn't work when given non-default set of nodes
SERVER-56937 upgradeSet() in multi_rs.js may lose authentication state while upgrading primary
Write Operations
SERVER-38909 Permit empty update modifiers, treating as a no-op rather than an error
Storage
SERVER-51699 index_build_restart_secondary.js (indexbg_restart_secondary.js) should handle exceptions when checking indexes after restarting node
Operations
SERVER-48567 Warnings while processing snmpwalk
Build and Packaging
SERVER-50568 Platform Support: Remove Ubuntu18.04 zSeries from 5.0
SERVER-55460 Fix RPM packaging and testing for SLES 12
Internals
SERVER-37125 Powercycle should ignore a process reference if it no longer exists
SERVER-43617 Add metrics on the mongos to indicate the number of shards targeted for the commands (find, aggregate, etc)
SERVER-45153 Ignore metrics temp files in FTDCFileManager
SERVER-47509 resmoke accepts multiple "mongodSetParameters" options but only uses the last one
SERVER-47720 Clarify "RecordId(...) not found in the index for key" log message
SERVER-48636 Increase assertEventDoesNotWakeCursor getMore timeout in only_wake_getmore_for_relevant_changes.js
SERVER-48890 allow $addFields with empty document and have it be a no-op
SERVER-49336 Set client metadata if it is missing during failCommand
SERVER-50955 oplog_rollover.js pauses the OplogCapMaintainerThread until truncation is needed
SERVER-53334 Hitting unexpected invariant failure, causing server shutdown
SERVER-53643 Startup can see old version of featureCompatibilityVersion document
SERVER-53726 Platform Support: Remove RHEL6 zSeries
SERVER-53728 Platform Support: Remove SLES12 zSeries
SERVER-53841 Additional logging for oplog_rollover.js
SERVER-54489 Full validation can append errors without bound
SERVER-54897 Adding the shard-single config to etc/system_perf.yml
SERVER-55019 install_compass does not run on all supported platforms
SERVER-55119 Create startup warning indicating that X.509 certificates without SANs are deprecated
SERVER-55316 Disconnect LDAP connections out of line
SERVER-55742 Define kmipClientCertificateSelector config on windows/macOS
SERVER-56062 Restart index builds after CappedPositionLost errors
SERVER-56164 All performance projects use the master DSI branch
SERVER-56273 Update curator hash in powercycle remote host setup
SERVER-56307 The chunk migration "convergence algorithm" is very primitive
SERVER-56310 Use w: majority for createCollection command in kill_sessions_with_prepared_transaction.js
SERVER-56325 Wait for failpoint in server_transaction_metrics.js to be hit so that a valid serverStatus is received
SERVER-56347 Enable LSE intrinsics in release
SERVER-56372 Add retryableFindAndModifyStorageLocation server parameter
SERVER-56373 [RRFaM] When writing FaM images to txn table, write oplog entries with needsRetryImage
SERVER-56374 [RRFaM] Have update path write to config.image_collection
SERVER-56375 [RRFaM] Have delete path write to config.transactions
SERVER-56376 [RRFaM] Add jstest that exercises both retryable FaM behaviors
SERVER-56377 [RRFaM] Add FSM test to perform retryable FaM while flipping server parameter
SERVER-56452 Self anchor in PooledLDAPConnection::setup's callback
SERVER-56468 Incorrect plan cache entry for {$ne: null} predicate, leads to missing query results
SERVER-56501 Add op counters for legacy op codes (OP_QUERY, OP_INSERT, etc.)
SERVER-56563 [RRFaM] Forge noop image oplog entries for chunk migration
SERVER-56630 Unittest OpObserverImpl::onDelete/onUpdate paths for retryable findAndModify
SERVER-56713 [RRFaM] Avoid creating images while in initial sync
SERVER-56715 Using incorrect var name for logkeeper dataset on 4.2
SERVER-56819 $indexOfCP returns incorrect result when searching for empty string inside empty string with non-zero start index (classic execution engine only)
SERVER-56952 [4.4] Add new build variant with storeFindAndModifyImagesInSideCollection=true
SERVER-57015 [RRFaM] Writing to the image collection must be in an UnreplicatedWriteBlock
SERVER-57036 Pin MarkupSafe == 1.1.0
SERVER-57043 Test for Branching
SERVER-57053 Rewriting $nor with a $text predicate to $not is invalid
SERVER-57057 Reduce routing info refreshes on the mergeChunks path
SERVER-57091 Infinite loop in GranularityRounderPreferredNumbers::roundDown
SERVER-57145 Invariant failure at OCSPManager::requestStatus
SERVER-57157 assert serverStatus command works in getBinVersion() jstest helper
SERVER-57172 Do json.send before DSI post_run
SERVER-57173 Write invalidated image for retryable findAndModify when secondaries apply operations earlier than minValid
SERVER-57233 Reap LDAP connections inline if multithreading is not enabled
SERVER-57273 remove the flow_control_replica_set.js test
SERVER-57275 Update kmip_server.py to be more verbose
SERVER-57299 Need to wait for failed exit code in startup_recovery_for_restore_needs_rollback.js
SERVER-57328 Make ReplsetTest.upgradeSet() tolerant of reelections
SERVER-57330 Update perf yaml configs for perf and sys-perf to use perf.send
SERVER-57476 Operation may block on prepare conflict while holding oplog slot, stalling replication indefinitely
SERVER-57490 [v4.2] Add storeFindAndModify build variant name to mongodcryptd list in etc/evergreen.yml
SERVER-57497 store_retryable_find_and_modify_images_in_side_collection.js should account for a later clustertime in retried findAndModify responses
SERVER-57544 Also backport store_retryable_find_and_modify_images_in_side_collection.js to 4.2
SERVER-57564 Increase system timeout duration to >2 hours to allow fio to copy over all files
SERVER-57708 ClientMetadata Parsing errors can leave ClientMetadataState decoration in invalid state
SERVER-57768 Deprecated counters aren't reset to zero on wrap
SERVER-57897 Add readPrefMode option to benchRun find/findOne ops
SERVER-57954 Update TPC-C version in sys-perf.yml
4.2.14 Changelog
Sharding
SERVER-52564 Deadlock between step down and MongoDOperationContextSession
Replication
SERVER-50412 Change “not master” error messages to “not primary”
SERVER-50414 Change “not master or secondary; cannot currently read from this replSet member” to “not primary or secondary; cannot currently read from this replSet member”
SERVER-54180 ReplSetTest's stepUp function only waits 6 seconds for nodes to agree on primary
SERVER-55007 Deadlock between step down and MongoDOperationContextSession
Query
SERVER-54710 Large number of $or clauses can create profiling entry exceeding max BSON size, causing the query to fail when it should not
Storage
SERVER-44821 retrieving storage stats for currentOp blocked by slow oplog application
Operations
SERVER-54770 Add /proc/meminfo MemAvailable to FTDC
Build and Packaging
SERVER-54031 errorcodes.py doesn't check embedded C++ code in Python scripts
SERVER-54057 Mongodb-org-server el8 package has dependency on python2
SERVER-54386 mongodb 3.6.22 install fails if systemctl daemon is not running
SERVER-55067 Migrate Windows builds to VS Current distro
Internals
SERVER-5722 Support a 'sort' field in ops array for JS Benchmarking Harness
SERVER-42944 scons compiledb exits with a stack trace
SERVER-49054 Server MSI should install Compass instead of Compass Community
SERVER-51465 Update package tests after compass installer update
SERVER-52610 Verify installation prefix is added to correct location in the RPM
SERVER-52833 Capped collections can contain too many documents after replication recovery
SERVER-52953 $geoNear does not always match coordinate given to 'near' when maxDistance is set to 0
SERVER-53566 Investigate and reproduce "opCtx != nullptr && _opCtx == nullptr" invariant
SERVER-54136 Make the authenticate command respect enforceUserClusterSeparation
SERVER-55038 Collect data files if zbigMapReduce.js fails
SERVER-55189 Call awaitReplication() before returning from syncFrom() in rslib.js
SERVER-55225 [v4.2] Collect data files for incremental_backup_rollback.js
SERVER-55395 4.0.23 does not build with gcc 10
SERVER-55602 Relax non-read-only invariant in WiredTigerKVEngine::makeTemporaryRecordStore when recoverToOplogTimestamp is specified
SERVER-55753 Use w: majority for createCollection command in transactions_committed_with_tickets_exhausted.js
SERVER-56164 All performance projects use the master DSI branch
SERVER-56371 Upgrade timelib to 2021.06
SERVER-56451 [4.2] update test for backup API to retry on conflict with checkpoint thread
WT-7373 Improve slow random cursor operations on oplog
4.2.13 Changelog
Sharding
SERVER-53236 Disable merge_with_move_primary.js from running on the sharding_csrs_continuous_config_stepdown suite
SERVER-53651 Just search for user-issued profiled aggregation in read_pref_cmd.js
SERVER-54014 Define a reasonable maxTimeMsOverride for the checkOID requests
Replication
SERVER-51163 Mark nodes returning InvalidReplicaSetConfig in heartbeats as down
SERVER-53248 call awaitLastOpCommitted before committing transaction in retryable_prepared_commit_transaction_after_failover.js
SERVER-53609 lastCommittedTransaction section causes frequent schema changes that limit FTDC retention
SERVER-53666 curSecondary in rollback test fixture not guaranteed to be in SECONDARY state after restart
SERVER-54339 Prevent spontaneous elections in rollback_crud_op_sequences.js
SERVER-54648 Add correct log verbosity to disallow_adding_initialized_node2.js
Query
SERVER-47869 Add diagnostic logging to ClusterCursorManager
SERVER-48442 Fix change_streams.js to test events in any order
SERVER-50073 Error message when creating a mixed hashed/not hashed index does not state the problem
SERVER-54660 Make jstests/sharding/kill_pinned_cursor.js more robust
Storage
SERVER-46876 During the eviction pressure, we should quit the compact operation instead of crashing the process
SERVER-54760 (4.2) Ghost timestamps can cause concurrent causal snapshot reads to not read their own writes
Build and Packaging
SERVER-52705 Rebuilding mongodb according to building.md failed because python3 is an alias/link (led to ModuleNotFoundError)
SERVER-54058 Update Debian 10 AMI for package testing
SERVER-54255 Update RHEL 7 AMI for package testing
SERVER-54858 Update Amazon Linux AMI for package testing
Internals
SERVER-35649 Nodes removed due to isSelf failure should re-attempt to find themselves
SERVER-43904 When stepping down, step up doesn't filter out frozen nodes
SERVER-44132 DataBuilder move assignment computes size incorrectly
SERVER-45836 Provide more LDAP details (like server IP) at default log level
SERVER-46686 Explain does not respect maxTimeMS
SERVER-46740 establishCursors() must always drain the AsyncRequestsSender::_baton
SERVER-47030 Fix date_time_support code to not produce exceptions
SERVER-49222 ARM64 support on Amazon Linux 2
SERVER-50592 Update mypy pip requirement
SERVER-51038 resmoke.py can't be run on python 3.8
SERVER-51722 Ensure that MongoDB builds with ARM LSE atomics
SERVER-52884 Remove race in reconstruct_prepared_transactions_initial_sync.js
SERVER-53196 Fail to generate tasks if a large distro is specified but not available
SERVER-53394 Make ShardingTaskExecutorPoolReplicaSetMatching default to disabled for MongoD
SERVER-53579 python's dev-requirements.txt is incompatible with pip 20.3.3
SERVER-53612 StepDown hangs until timeout if all nodes are caught up but none is immediately electable
SERVER-53717 Dynamically split large concurrency tasks
SERVER-53780 Fix missing quote in test parameters
SERVER-53831 Force SpiderMonkey to garbage collect in ReplSetTest.checkOplogs
SERVER-53836 Add multiversion-related expansions on Enterprise Ubuntu 16.04 (with {taskExecutorPoolSize=4}) build variant
SERVER-53932 Multikey write during recovery of prepared transaction could use commit timestamp < stable timestamp
SERVER-53992 Remove calls to detect-outliers from performance tasks
SERVER-54091 Update assertion messages for dbhash check run by resmoke.py
SERVER-54134 Ignore newer mongo versions on older branches of setup_multiversion_mongodb.py
SERVER-54139 Remove CURL share support from HTTP curl client
SERVER-54278 Add feature flag to disable Opportunistic Reads by default
SERVER-54366 Wait for node to start stepdown before killing shutdown operation in force_shutdown_primary.js
SERVER-54369 Update Jasper gRPC to latest version
SERVER-54458 updated vendored scons to use uuid for cache tmpfiles
SERVER-54484 resmoke/util/archival.py relies on deprecated and now removed thread.isAlive
SERVER-54505 Fix logic for ignored large distro build variants in 4.2
SERVER-54684 Decreased JS performance on arm64 due to mising init function
SERVER-54685 wrong definition of MONGO_YIELD_CORE_FOR_SMT for arm64
SERVER-54733 Enterprise Ubuntu 16.04 arm64 aggregation_multiversion_fuzzer failures
WT-6309 Add support for start/stop arguments to wt printlog command
WT-6430 Move WT_CONN_SERVER flags into their own field
WT-6844 Make force stop durable
WT-7026 Atomically read and set ref->addr in case of race
WT-7027 Run the metadata checkpoint for force_stop at read-committed isolation for incremental backup
WT-7028 Sweep thread shouldn't lock during checkpoint gathering handles
WT-7104 Redact user data from printlog output
4.2.12 Changelog
Sharding
SERVER-46393 Always check client last operation time when computing operationTime to append to the response
SERVER-50900 Disable PeriodicShardedIndexConsistencyChecker for cursor_valid_after_shard_stepdown.js
SERVER-52732 Uptime reporter disables autosplit during ShardingTest initialization
SERVER-53444 Make tests that run removeShard in assert.soon to wait for the state to become "completed" not error on ShardNotFound
Replication
SERVER-49187 Make ReplSetTest .stepUp() robust to election failures.
SERVER-50049 assert.soonNoExcept() should not access TestData.traceExceptions for non-resmoke tests.
SERVER-50416 Change notMasterLegacyUnacknowledgedWrites to notPrimaryLegacyUnacknowledgedWrites in serverStatus
SERVER-50417 Change notMasterUnacknowledgedWrites to notPrimaryUnacknowledgedWrites in serverStatus
SERVER-50869 Background sync may erroneously set applied-through during step-up
SERVER-50901 RollbackTest should wait for secondaries before doing data consistency checks
SERVER-52560 oplog_writes_only_permitted_on_standalone.js must wait for insert to be in stable checkpoint
SERVER-52680 Removed node on startup stuck in STARTUP2 after being re-added into the replica set
SERVER-52744 rollback node's lastApplied > sync source's lastApplied in rollback_after_enabling_majority_reads.js
SERVER-53026 Secondary cannot restart replication
SERVER-53345 Excuse arbiter_new_hostname.js from multiversion tests
Query
SERVER-32960 $mod has inconsistent rounding/truncation behavior
SERVER-40361 Reduce memory footprint of plan cache entries
SERVER-50769 server restarted after expr：{"expr":"_currentApplyOps.getArrayLength() > 0","file":"src/mongo/db/pipeline/document_source_change_stream_transform.cpp","line":535}}
Aggregation
SERVER-34741 Move $match in front of $group if condition is on group key
SERVER-40090 DISTINCT_SCAN in agg is only used when certain format of _id is specified
SERVER-51886 $lookup + $merge pipeline may fail to resolve views correctly when collection names collide
Storage
SERVER-47812 Secondaries persist wildcard multikeypaths out of order
SERVER-48471 Hashed indexes may be incorrectly marked multikey and be ineligible as a shard key
SERVER-51858 Investigate queryable issue on 4.0.20
SERVER-52950 recoverOplogAsStandalone mode must not start oplog truncater thread
SERVER-53703 [4.2] Opening a transaction at the all durable timestamp can go backwards
Build and Packaging
SERVER-52891 Run PPC builds less frequently
Internals
SERVER-41836 Log thread Id as part of error in FSM tests
SERVER-43739 SNI name is not set on OSX if allowInvalidHostnames is enabled
SERVER-44375 fix merge_with_drop_shard.js when the curop command fails due to ShardNotFound
SERVER-47863 Initial Sync Progress Metrics
SERVER-48742 Log whenever profiler settings are changed via setProfilingLevel
SERVER-50267 Set output limit for 'rawMongoProgramOutput()'
SERVER-50445 Return the value as double when NumberLong subtraction overflows in ExpressionSubtract
SERVER-51526 Hybrid index builds can miss writes and crash in the event of a well-timed WriteConflictException
SERVER-51607 Upgrade Twisted dependency to at least twisted-19.7.0
SERVER-52618 Sparse hash index should not be used for equality to null match
SERVER-52646 Validate and possibly fix edge cases in regex rewrite rules for userToDNMapping
SERVER-52654 new signing keys not generated by the monitoring-keys-for-HMAC thread
SERVER-52806 deb install files assume systemd
SERVER-52879 Periodic operation latency spikes every 5 minutes due to closing idle cached WT sessions
SERVER-52919 Wire compression not enabled for initial sync
SERVER-52929 Correctly handle compound indexes with 32 keys
SERVER-52969 Disable Powercyle on non-master branches
SERVER-52975 Fix use of 'onRollback' callback for collection validator options in 'collection_impl.cpp'
SERVER-53233 Fix change_streams_update_lookup_shard_metadata_missing.js [4.2, 4.0]
SERVER-53234 jstests/core/profile2.js fails when background operations are run against test database
WT-6835 Add API to allow consolidating incremental backup info
WT-6839 Add API to query existing incremental backup IDs
WT-6882 Files created during incremental backup should be copied in full
WT-6922 Add random consolidate testing to incr_backup
4.2.11 Changelog
Security
SERVER-45938 Allow matching O/OU/DC in client x509 cert if clusterMode:keyFile
Sharding
SERVER-36739 Use the mongos_manual_intervention_action hook in concurrency stepdown suites
SERVER-47616 Improve error when logical sessions cannot have more than one user authenticated on a single connection
SERVER-51808 invariant failure: readConcern level != Available
Replication
SERVER-33747 Arbiter tries to start data replication if cannot find itself in config after restart
SERVER-50116 Forbid oplog writes when replication is enabled
SERVER-50415 Rename waitInIsMaster failpoint to waitInHello
SERVER-50527 Change NotMasterError category to NotPrimaryError
Query
SERVER-51120 Find queries with SORT_MERGE incorrectly sort the results when the collation is specified
SERVER-51853 Always initialize the numInserted out-parameter in AbstractIndexAccessMethod::insertKeys
Write Operations
SERVER-44586 add metrics to serverStatus to track type of update command
Aggregation
SERVER-48523 Unconditionally check the first entry in the oplog when attempting to resume a change stream
Storage
SERVER-43664 Speedup WiredTiger storage engine startup for many tables by optimizing WiredTigerUtil::setTableLogging()
Operations
SERVER-46729 Make Windows shell soft-fail for unavailable OCSP responder
SERVER-51757 Collect /proc/vmstat numa_pages_migrated statistics in FTDC
Build and Packaging
SERVER-46342 DEB installs of MDB do not issue systemctl daemon-reload on install
SERVER-50016 Fail on missing variable customization files
Internals
SERVER-43973 jsTestName() should return a unique name for each thread in the parallel suite
SERVER-45992 InMemory engine startupwarnings confusing
SERVER-46625 Improve diagnostics when mongocryptd requests are sent to non-mongocryptd daemon
SERVER-48078 Remove OpDebug invariant that relies on monotonic clock source
SERVER-48502 Tighten $currentOp and pinned cursor checks in kill_pinned_cursor.js
SERVER-49165 endSessions command in Client.Disconnect causes an authorization failure for an unauthed connection on a host that requires authentication
SERVER-49957 Read out of bounds in getPrevAndNextUUIDs
SERVER-50072 Check _isWindows() when initializing MongoRunner.EXIT_ABORT
SERVER-50123 Record number of physical cores on all platforms
SERVER-50216 Adjust sys-perf frequencies
SERVER-50365 Stuck with long-running transactions that can't be timed out
SERVER-50605 Add {logMessage: "msg"} test-only command
SERVER-50647 Fix OCSP HTTP Client timeout for Windows
SERVER-50736 Make OpenSSL explicitly accept SNIs presented in ClientHello
SERVER-50818 Coverity analysis defect 114987: Wrapper object use after free
SERVER-51004 Disable WT-Develop sys-perf build variants on sys-perf-4.2
SERVER-51058 log_remote_op_wait.js misuses rawMongoProgramOutput
SERVER-51106 Make the isMaster command a derived class of hello
SERVER-51220 Handle auditing attribution in indirect drops
SERVER-51303 Lookup stage followed by $match on type uses wrong field in matching condition
SERVER-51840 Reduce dbtest jobs on 4.2 on Windows debug
TOOLS-2588 [v4.2] sslAllowInvalidHostnames bypass ssl/tls server certification validation entirely
WT-6160 Fix format failure caused by stack overwrite
WT-6507 Exit cache eviction worker after our operation has timed out
WT-6602 Allow operation timeout ms to be passed to commit and rollback
WT-6666 Start op timer when we configure it in rollback and commit
4.2.10 Changelog
Security
SERVER-50463 Make PooledLDAPConnection::refresh take self-ownership
Sharding
SERVER-37422 Log balancer start and stop events in the actionlog
SERVER-48601 ChunkSplitter should use the same chunk bounds for splitVector and splitChunk
SERVER-48679 flushRoutingTableCacheUpdates should block on critical section with kWrite, not kRead
SERVER-50889 migration_failure.js should run setFCV through the router instead of the config server
Replication
SERVER-47263 Inaccurate log message when losing dry run election
SERVER-47645 Must invalidate all sessions on step down
SERVER-48518 Rollback via refetch (EMRC = false) can make readers to see the rolled back data even after the rollback node catches up to primary.
SERVER-48928 Allow primary-elect to complete drain mode even if it is stepping down unconditionally
SERVER-49986 Convert isMaster command to hello and add aliases
SERVER-49987 Rename response fields if “hello” is sent on mongod
SERVER-49988 Rename response fields if "hello" is sent on mongos
SERVER-49989 Add db.hello() shell helper
SERVER-49990 Alias setSlaveOk() and getSlaveOk() shell helpers
SERVER-49991 Alias printSlaveReplicationInfo() shell helper
SERVER-50405 Alias isMaster in mongocryptd and attach appropriate response field
SERVER-50607 Must hold mutex when calling _checkForShutdownAndConvertStatus_inlock
SERVER-50626 Race in read_concern_majority_getmore_secondaries.js
SERVER-50640 listCommands should return "isMaster" alias in addition to "hello" command name
Query
SERVER-47469 applyOps does not take exclusive lock for views operation
SERVER-50291 Add query knob to enumerate $or children in a different order
Aggregation
SERVER-31368 Log time spent waiting for other shards in merge cursors aggregation stage
SERVER-40317 $facet execution has no limit on how much memory it can consume
Operations
SERVER-26726 Check number of arguments for createIndex() and throw error if more than two arguments
Build and Packaging
SERVER-23668 scons abbreviated options do not work properly
SERVER-44632 Platform Support: Remove Community zSeries from 4.2
SERVER-47138 MSI installer produces incorrect config file
SERVER-50078 Compile bypass applied when it should not have
Internals
SERVER-42852 buildStages() STAGE_SHARDING_FILTER block should hold child stage tree by unique_ptr
SERVER-43233 Add ability to request only specific attribute(s) for the LDAP groups
SERVER-45202 Improve Command alias infrastructure
SERVER-47428 Move concurrency_sharded* Evergreen tasks to -large distros
SERVER-48048 Use resmoke tag files for multiversion blacklisting
SERVER-48410 Signed integer overflow fix for datetime library
SERVER-48709 signing key generator thread on config server not waken up as expected
SERVER-49054 Server MSI should install Compass instead of Compass Community
SERVER-49438 Allow memory.js tests to accept $where timeout interruption
SERVER-49766 Indexed and non-indexed collections return different results for null query
SERVER-49786 Freeze DSI and Genny for non-master perf projects
SERVER-49922 Make schema_validator_with_expr_variables.js less heavy
SERVER-50183 Copy _awaitPrimaryAppliedSurpassesRollbackApplied function from RollbackTest to RollbackTestDeluxe
SERVER-50326 Restrict sharding in agg_out.js workload to a single thread
SERVER-50394 mongod audit log attributes DDL operations to the __system user in a sharded environment
SERVER-50403 Build server on combined visual studio image
SERVER-50760 [v4.2] Switch MultiOplogEntrySyncTailTest to use wiredTiger
SERVER-50822 [4.2] dont_read_oplog_hole_on_step_up.js should wait for all nodes to agree on a primary
SERVER-51041 Throttle starting transactions for secondary reads
WT-6000 Enhance incremental backup testing in format to support restart
WT-6215 Clear backup block information on rename: Reverted
WT-6421 Avoid parsing metadata checkpoint for clean files
WT-6539 Fix backup and rename memory leak
WT-6559 Use the session id from the new session to determine statistics bucket
WT-6598 Add new API allowing changing dhandle hash bucket size
WT-6610 Fix incremental backup checkpoint parsing to handle upgrades
WT-6611 Revert enhancement allowing rename and incremental backup
4.2.9 Changelog
Security
SERVER-47733 SymmetricEncryptorWindows shouldn't pad when update is called
Sharding
SERVER-40441 Arbiter nodes log error messages when try to create session collection or check if it exists
SERVER-46194 Applying transfer mods in a migration does not handle write conflicts
SERVER-48096 PeriodicShardedIndexConsistencyChecker thread on jstests can cause unintended shard refreshes
SERVER-48229 Shutdown PeriodicShardedIndexConsistencyChecker after ReplicationCoordinator so no thread will try to pause the job after it has stopped
SERVER-48491 Add requires_document_locking tag to sessions_collection_reaping.js
SERVER-48674 Check if replication is enabled before checking if the node is an arbiter in LogicalSessionCacheImpl
SERVER-48926 Fix remaining sharding tests that incorrectly set votes to 0 on shard secondaries
SERVER-49233 Introduce a flag to toggle the logic for bumping collection's major version during split
SERVER-49311 PeriodicShardedIndexConsistencyChecker might cause failures on stale_mongos_and_restarted_shards_agree_on_shard_version.js
Replication
SERVER-44779 Invariant internal operations that hit a prepareConflict must be marked killable
SERVER-45610 Some reads work while system is RECOVERING
SERVER-47849 Add more logging to shutdownTask
SERVER-48525 Forbid dropping config.transactions when there are prepared transactions
SERVER-48527 Aborting in-progress transactions on step-up should clear session state before returning
SERVER-48576 Fix the election race in change_stream_stepdown.js
SERVER-48611 speculative_majority_find.js should call awaitLastOpCommitted before running majority read that is expected to succeed
SERVER-48712 Race in write_concern_after_stepdown.js
SERVER-48778 Make reconstruct_prepared_transactions_initial_sync.js robust to election failures.
SERVER-48967 Prevent replicated writes on empty namespaces on secondaries
SERVER-48979 Race between config propagation and election in change_stream_stepdown.js
SERVER-49471 Retry on WT_ROLLBACK when applying prepareTransaction oplog entry
SERVER-50039 Timing error in dbadmin.js test
Query
SERVER-35921 Index scan uses incorrect bounds for MinKey and MaxKey
SERVER-44273 Failure to parse certain time zone specifications on windows platforms.
SERVER-45233 Indexed inequalities to arrays return incorrect results
SERVER-47223 geoNear/$geoNear does not apply index hints
SERVER-48614 Plan cache key computation for wildcard indexes with partialIndexFilter is incorrect, leading to incorrect query results
SERVER-48950 Enhance explain for $search to expose stats from mongot
SERVER-48993 explodeForSort can produce incorrect query plan
SERVER-49527 recoverFromOplogAsStandalone does not relax index constraints
Catalog
SERVER-47714 Secondary asserts on system.profile collection with WiredTigerRecordStore::insertRecord 95: Operation not supported
Storage
SERVER-44529 Re-acquiring locks after a yield and step down results in wrong parameters on recoveryUnit
SERVER-48274 Remove readOnly mode for queryable restores of encrypted sharded clusters
SERVER-48453 Lazily initialize a record store's auto incrementing counter on deletes
SERVER-48695 setAppliedThrough must set orderedCommit=false on the recovery unit
Operations
SERVER-44051 getShardDistribution() does not report "Collection XYZ is not sharded" on dropped but previously sharded collections
SERVER-48244 Shell should not hard-code the allowed explain levels and let the server reject it instead
Build and Packaging
SERVER-42042 Warn or fail early on dynamic builds with toolchain compiler and tcmalloc
SERVER-46445 MongoDB MSI installer showing irrelevant error message while installing in server configuration window