4.2 Changelog
- 4.2.1 Changelog

4.2 Changelog

4.2.1 Changelog

Security

SERVER-28011 Support multiple KMIP hosts in the –kmipServerName parameter
SERVER-41277 Create FLE Data Framing Classes
SERVER-42351 RHEL8 TLS 1.0 and TLS 1.1 protocols are disabled in the DEFAULT system-wide cryptographic policy level
SERVER-43243 Reintroduce unused repairDatabase ActionType

Sharding

SERVER-10456 get cursor logic used to find docs to clone (in migration) is not same as in removeRange
SERVER-11328 Allow concurrent draining shards
SERVER-33973 Commands to force cleanup of partial data that might have remained after failed collection/database drop
SERVER-36222 call to ReplSetTest.restart in shard_identity_rollback.js is racy
SERVER-36315 After stepdown the CSRS dist lock manager keeps trying to unlock locks
SERVER-39573 Add unique id to log label “TransactionCoordinator”
SERVER-39763 transactions_target_at_point_in_time.js should disable expiring old chunk history
SERVER-40258 Relax locking requirements for sharding metadata refresh on shards
SERVER-40496 transactions_snapshot_errors_subsequent_statements.js and transactions_writes_not_retryable.js should not use mode {times: 1} for failpoint
SERVER-40852 mongod_returns_no_cluster_time_without_keys.js should wait for shard primary to load cluster time keys
SERVER-40983 Track and log relevant single transaction metrics on mongos for currentOp
SERVER-41374 Add currentOpen, currentActive, and currentInactive to mongos transactions serverStatus output
SERVER-41376 Track time transactions on mongos are active and inactive and include in slow txn logging
SERVER-41615 Transaction coordinator diagnostics should handle coordinator failover
SERVER-41758 Dropping config.shards is allowed and can cause mongos to crash in aggregation code
SERVER-42006 Add transaction tags to prepared_txn_metadata_refresh.js
SERVER-42234 Make txn_two_phase_commit_failover.js robust to all replica nodes running for election at the same time
SERVER-42335 ShutdownShouldCancelQueuedRequests cpp test can ignore kill signal
SERVER-42338 transaction_coordinator_test can self deadlock
SERVER-42457 Check if cluster time has been set on TransactionRouter before observing from an external thread
SERVER-42559 Race in WaitWithOpTimeEarlierThanLowestQueued causes it to fail
SERVER-42610 Flip order of assert.lte arguments in shards_and_config_return_last_committed_optime.js
SERVER-42751 Take CSRLock when observing transaction commit for migration
SERVER-42809 Track and log relevant single two phase commit metrics for transaction coordinator on mongod for currentOp
SERVER-42842 Unable to drop collection in admin database of sharded cluster
SERVER-42856 Transactions with write can be sent to the wrong shard
SERVER-42907 Add timeActiveMicros and timeInactiveMicros for transactions in mongos currentOp output
SERVER-42963 For active sessions only set transaction stats in TransactionRouter::Observer::_reportState()
SERVER-43196 Blacklist update_where.js from sharded concurrency suites with balancer on and no txn override

Replication

SERVER-7019 rs.status needs to show initial sync happening
SERVER-7681 Report majority number in ReplSetGetStatus/isMaster
SERVER-36570 Make OplogEntry mutable
SERVER-38356 Forbid dropping oplog when replset config is present
SERVER-39576 Remove doTxn test command
SERVER-39610 Reformat TransactionParticipant comments and remove last references to the metrics mutex
SERVER-39613 Remove kCommittingWithPrepare and kCommittingWithoutPrepare from TransactionState
SERVER-39614 Remove inActiveOrKilledMultiDocumentTransaction() from TransactionParticipant
SERVER-40466 Unify checks for inMultiDocumentTransaction and friends
SERVER-41221 rollback_after_enabling_majority_reads.js test should make sure the final rollback occurs on node 0
SERVER-41457 Unify the different ways the TransactionParticipant offers for aborting a transaction
SERVER-41465 fassert when applying operations for transactions on secondaries
SERVER-41481 Return dbResponse object stored with exhaustNS and exhaustCursorId in receivedCommands
SERVER-41482 makeExhaustMessage should no longer call OpMsg::parse
SERVER-41497 Create IDL types for ElectionMetrics, ElectionCandidateMetrics and ElectionParticipant Metrics
SERVER-41498 Create ReplicationMetrics class
SERVER-41499 Track number of elections called for each reason in serverStatus
SERVER-41500 Track number of successful elections for each reason in serverStatus
SERVER-41501 Track the number of elections that require primary catchup in serverStatus
SERVER-41502 Track the number of times primary catchup concludes for each reason in serverStatus
SERVER-41503 Track the target opTime for catchup in replSetStatus on primaries
SERVER-41504 Track the number of ops during catchup in replSetStatus on primaries
SERVER-41505 Track the average number of catchup ops in serverStatus
SERVER-41506 Track metrics associated with a node calling an election
SERVER-41507 Track the time the new term oplog entry was written in replSetStatus on primaries
SERVER-41508 Track the time the new term oplog entry was majority committed in replSetStatus on primaries
SERVER-41509 Track the number of attempted stepDowns in serverStatus
SERVER-41510 Track the number of failed stepDowns in serverStatus
SERVER-41511 Track the number of stepdowns caused by seeing a higher term in serverStatus
SERVER-41580 Don’t run transactions suites on the No Journal builder
SERVER-41788 Add OplogApplication::Mode to options in the OplogApplier
SERVER-41918 CollectionBulkLoader does not anticipate exceptions from MultiIndexBlock
SERVER-41955 Add test for replicating prepare oplog entries that were received during initial sync
SERVER-41956 Add integration tests for killOp of commit and abort of prepared transactions
SERVER-41957 Add integration tests for killSessions of a session with a prepared transaction on it
SERVER-41958 Add a test for rolling back prepare and then trying to retry prepare
SERVER-41959 Test running transaction commands through the applyOps command
SERVER-42129 Modify test to account for the ephemeralForTest storage engine’s missing oplog after restart
SERVER-42155 Indicate term mismatches when readConcern times out
SERVER-42219 Oplog buffer not always empty when primary exits drain mode
SERVER-42453 ensure current clusterTime is greater than afterClusterTime value for read in step_down_on_secondary.js
SERVER-42454 Wait for node to find appropriate sync source before disabling failpoint in do_not_advance_commit_point_beyond_last_applied_term.js
SERVER-42478 Remove DB MODE_X locks from oplog application of create/createIndexes
SERVER-42484 May not be inside required WriteUnitOfWork when writing multikey index keys during initial sync data cloning
SERVER-42523 Add more logging to oplog_rollover.js
SERVER-42534 Step down primary for less time in freeze_timeout.js and increase electionTimeoutMillis
SERVER-42562 Increase election timeout for recover_prepared_transactions_startup_secondary_application.js
SERVER-42602 Guarantee that unconditional step down will not happen due to slow node restarts in rollbackfuzzer[un]clean_shutdowns suites.
SERVER-42613 getHashes should default to liveSlaves, not _slaves in replsettest.js
SERVER-42714 Log replication recovery oplog application completion at level 0
SERVER-42750 OperationContext::inMultiDocumentTransaction() doesn’t return true when applying operations for prepared transaction during recovery
SERVER-42755 recover_prepared_txn_with_multikey_write.js should make sure no prepare conflicts are generated on catalog object after restarting node
SERVER-42767 Improve logging in ReplSetTest.stopSet
SERVER-42910 Oplog query with higher timestamp but lower term than the sync source shouldn’t time out due to afterClusterTime
SERVER-43016 Fix typo in timestamped_reads_wait_for_prepare_oplog_visibility.js and check that nModified = 1
SERVER-43230 Fix race in catchup_takeover_two_nodes_ahead.js
SERVER-43237 replSetFreeze and replSetStepDown cmd done part of restartNode()/transitionToSteadyStateOperations() in rollback test should be resilient of network error.
SERVER-43330 ReplicationStateTransitionLockGuard::_unlock doesn’t work with its move constructor

Query

SERVER-37690 countDocuments throws an error when matching 0 document
SERVER-40110 ClusterCursorManager::CursorEntry::isKillPending() should not call checkForInterrupt
SERVER-40382 Add a serverStatus metric to report plan cache memory consumption
SERVER-41863 Make sleep command check that server clock has advanced before returning
SERVER-41996 Improve PlanExecutor error logging
SERVER-42399 max_time_ms.js test should always disable failpoints if an exception is thrown
SERVER-42514 wait for all nodes to finish index builds in text_index_limits.js
SERVER-42518 Wildcard index plans miss results when the query path has multiple subsequent array indexes
SERVER-42744 Fix transaction history iterator to not return unowned BSON that may be left dangling
SERVER-42749 Ban server_status_with_timeout_cursors from transaction passthroughs
SERVER-42864 change index build initial write timestamp logic
SERVER-43074 Do not use a global variable to encode ‘multikeyPath’ information when writing out catalog documents
SERVER-43202 Aggregation system can continue trying to execute a query plan after being interrupted, leading to server-fatal invariant failure

Aggregation

SERVER-41770 Multiversion test for change stream support of large transactions
SERVER-42756 $multiply operator may return with or w/o an error depending on whether pipeline optimisation is enabled

Catalog

SERVER-42567 Remove magic from CollectionImpl and IndexCatalogImpl

Storage

SERVER-39708 Fastpath no-ops to multikey updates in IndexBuildInterceptor::sideWrite to avoid mutex acquisition
SERVER-41533 Remove unnecessary IndexConsistency::_classMutex
SERVER-41534 Reuse KeyString in RecordStoreValidateAdaptor
SERVER-41535 Use vector instead of map for IndexConsistency::_indexesInfo
SERVER-41536 Use vector instead of map for IndexConsistency hash buckets
SERVER-41537 Use 64K hash buckets instead of 4M for index validation
SERVER-41538 Remove indirection through indexNumber in IndexConsistency
SERVER-41539 Cache key ordering in IndexInfo
SERVER-41540 Fix _indexNsResultsMap usage
SERVER-41909 Add the ValidateCmd Genny workload to system_perf.yml
SERVER-41937 Add a try-catch block in TimestampMonitor::startup() or notifyAll() to suppress exceptions
SERVER-41947 Disallow using the “system.views” collection name as the source or target names in the rename command
SERVER-42060 Limit maximum recursion depth for KeyString _appendBsonValue and toBsonValue
SERVER-42205 Raise the snapshot window’s cache pressure threshold from 50 to 95
SERVER-42373 Prevent “invalid view definition” error while dropping nonexistent collection
SERVER-42441 renameCollectionForApplyOps should always rename the target out of the way if it exists
SERVER-42652 Fix issue with rename collection
SERVER-42718 dropDatabase commands can be run concurrently, leading to an invalid state
SERVER-42799 obtain timestamp for cleaning up index build without noop write
SERVER-42800 skip size adjustments on temporary record stores for index builds
SERVER-42803 Remove ‘no except’ in the TimestampMonitor
SERVER-42824 do not lock RSTL for index build cleanup
SERVER-42869 IndexBuildInterceptor rollback handler access _sideWritesCounter field after interceptor is destroyed
SERVER-42915 New style repair’s catalog corrections are often false positives, aggressively marking repl nodes as corrupted
SERVER-43019 IndexBuildsCoordinator removes interrupted index build at shutdown on secondary
SERVER-43025 rollback should ignore no-op startIndexBuild oplog entry
SERVER-43075 MongoDB 4.2 cannot use storage.journal.commitIntervalMs param in yaml config file.
SERVER-43322 Add tracking tools for measuring OplogStones performance

WiredTiger

SERVER-39004 Introduce a quota mechanism for the overflow file

Operations

SERVER-41874 Never kill cursors in shell garbage collection in concurrency_simultaneous_replication
SERVER-42599 Regression prevents use of ‘show collections’ without listCollections privilege
SERVER-42969 Handle non-ascii characters inUSERPROFILE environment variable.
SERVER-43005 getKeyVault.createKey() should return the created data key
SERVER-43039 db.collection.bulkWrite doesn’t support hint with replaceOne
SERVER-43265 Mongo Shell exits with InvalidOptions error when using URI compressors parameter

Build and Packaging

SERVER-37768 Platform Support: Add Community & Enterprise Debian 10 x64
SERVER-37772 Platform Support: Add Community & Enterprise RHEL 8 x64
SERVER-41232 Update man pages
SERVER-41431 Platform Support: Re-enable SUSE 15 build variants
SERVER-41570 Xcode 11 generates new warnings
SERVER-42778 hot_backups should use RHEL 7 large
SERVER-42787 4.2.0 regression (vs 4.0.12): Build failure with various system packages
SERVER-42911 Rebuild mongodb by building.md and failed to build due to ModuleNotFoundError: No module named ‘Cheetah’ with MSVC on windows
SERVER-43046 Use toolchain python binary to create virtual environments

Internals

SERVER-25025 Improve startup time when there are tens of thousands of collections/indexes on WiredTiger
SERVER-36816 Avoid reloading the view catalog on the primary and secondaries during the dbhash check
SERVER-39776 Initial sync and replication threads simultaneous startup and shutdown races
SERVER-40004 Change the signature of AtomicWord::compareAndSwap to mimic the implementation
SERVER-41466 Blacklist mongos_no_detect_sharding from sharding_csrs_continuous_config_stepdown
SERVER-41492 Disable WiredTiger cursor caching and introduce more aggressive file handle sweeps in testing
SERVER-41585 background_thread_clock_source_test shouldn’t assume we can schedule the background thread
SERVER-41622 Reduce noisiness in flow_control_replica_set.js
SERVER-41802 generate_resmoke_tasks doesn’t apply max_sub_suites option
SERVER-41939 Connect to fastest LDAP server first
SERVER-42067 Ensure key Ordering offset does not exceed the maximum number of compound index keys
SERVER-42069 uassert when decimal type is encoded in KeyString V0
SERVER-42075 Add DSI module to perf.yml
SERVER-42178 Disable Split Horizon HOSTALIAS testing on SLES
SERVER-42210 Modify changestream tests on multiple databases to support interleaving
SERVER-42216 Ensure pin_getmore_cursor.js waits for server to finish killing cursor
SERVER-42303 NetworkInterfaceTL should schedule out-of-line immediately and never again
SERVER-42305 Need to ensure replication is finished initializing before advancing commit point in heartbeats
SERVER-42310 Specify mode for NamedTemporaryFile in hang_analyzer.py
SERVER-42356 teardown(finished=True) isn’t ever called for the NoOpFixture
SERVER-42400 Add new task in system_perf.yml for million documents in transaction workload
SERVER-42419 Ban whole_cluster_metadata_notifications test from running with majority read concern off
SERVER-42424 Blacklist max_doc_size.js and mr_bigobject.js from Periodic Kill Secondaries suite
SERVER-42440 burn_in_test should run tasks on the distro they are normally run
SERVER-42452 failNonIntentLocksIfWaitNeeded failpoint interrupts lock requests in UninterruptibleLockGuard
SERVER-42461 Allow errors in aggregates_during_balancing.js pending work in SERVER-29446
SERVER-42469 Increase initial sync passthrough timeout to 24 hours
SERVER-42476 Improve free monitoring tests
SERVER-42520 Auto encryption of a $changeStream aggregation fails with obscure error
SERVER-42561 searchbeta* tests fail on testing only changes
SERVER-42571 Collect Windows event logs on remote machine during powercycle
SERVER-42608 Allow updateOne and updateMany in shell helper to accept hint
SERVER-42615 Run chkdsk command on Windows after each powercycle loop
SERVER-42622 resmoke.py doesn’t attempt to tear the fixture down if setting it up raises an exception
SERVER-42623 sched module in Python 3 causes close() event to mistakenly be canceled, leading to resmoke.py hang
SERVER-42837 Allow the waitInFindBeforeBatch FailPoint to take a data.nss parameter
SERVER-42866 Trigger a logical session cache refresh on all shards in the ShardedCluster test fixture before running test
SERVER-42888 Deprecate CodeWScope for use within the mapReduce command
SERVER-42917 Flow Control should disregard faulty wall clock time readings during lag calculation
SERVER-42946 Setting 4.2 FCV in standalone with existing transaction table crashes MongoDB
SERVER-42953 ttl_repl_secondary_disabled.js should prevent elections
SERVER-43004 Turn on archive for zbigMapReduce in sharding suite
SERVER-43022 Allow compile to be run independently on rhel 62
SERVER-43081 validate should report when an index’s ‘multikeyPaths’ are set but the ‘multikey’ flag is false
SERVER-43093 Concurrent calls to ShardingReplicaSetChangeListener::onConfirmedSet can cause starvation in the fixed executor
SERVER-43166 auditFormat BSON writes incomplete bson
SERVER-43186 Limit the number of tests added to a generated suite
SERVER-43200 Make auth/mongoURIAuth.js robust to slow commands
SERVER-43288 Update fallback values for generated tasks