3.6 Changelog

This version of the documentation is archived and no longer supported. View the current documentation to learn how to upgrade your version of MongoDB.

3.6.23 Changelog

Query

SERVER-40361 Reduce memory footprint of plan cache entries

Internals

SERVER-43973 jsTestName() should return a unique name for each thread in the parallel suite
SERVER-46686 Explain does not respect maxTimeMS
SERVER-50267 Set output limit for 'rawMongoProgramOutput()'
SERVER-52969 Disable Powercyle on non-master branches
SERVER-53992 Remove calls to detect-outliers from performance tasks
SERVER-54134 Ignore newer mongo versions on older branches of setup_multiversion_mongodb.py
TOOLS-2803 [v3.6] Add --config option for password values

3.6.22 Changelog

Sharding

SERVER-53182 [v3.6] Omit "versions" from {shardingState: 1} command when not running as a --shardsvr

Replication

SERVER-33747 Arbiter tries to start data replication if cannot find itself in config after restart
SERVER-52680 Removed node on startup stuck in STARTUP2 after being re-added into the replica set
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

Storage

SERVER-52902 Remove assertion !haveJournalFiles() at dur_journal.cpp:265

Build and Packaging

SERVER-32437 Platform Support: add Amazon Linux 2
SERVER-52854 Fix package test on debian based system in 3.6

Internals

SERVER-50445 Return the value as double when NumberLong subtraction overflows in ExpressionSubtract
SERVER-50891 mongod 3.6.20-rc2 core dumps if dbpath DNE or perms block
SERVER-52654 new signing keys not generated by the monitoring-keys-for-HMAC thread
SERVER-52806 deb install files assume systemd

3.6.21 Changelog

Sharding

SERVER-51808 invariant failure: readConcern level != Available
SERVER-51885 Blacklist balancing_sessions_collection.js from sharding_csrs_continuous_config_stepdown

Replication

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-49991 Alias printSlaveReplicationInfo() shell helper
SERVER-50116 Forbid oplog writes when replication is enabled
SERVER-50640 listCommands should return "isMaster" alias in addition to "hello" command name

Query

SERVER-51083 Problem with regex index bounds
SERVER-51120 Find queries with SORT_MERGE incorrectly sort the results when the collation is specified

Storage

SERVER-34243 listCollections should not require a MODE_S database lock

Operations

SERVER-26726 Check number of arguments for createIndex() and throw error if more than two arguments

Build and Packaging

SERVER-46342 DEB installs of MDB do not issue systemctl daemon-reload on install

Internals

SERVER-45624 Pre-split and distribute chunks of sessions collection
SERVER-50123 Record number of physical cores on all platforms
SERVER-50216 Adjust sys-perf frequencies
SERVER-50605 Add {logMessage: "msg"} test-only command
SERVER-50736 Make OpenSSL explicitly accept SNIs presented in ClientHello
SERVER-50818 Coverity analysis defect 114987: Wrapper object use after free
SERVER-51106 Make the isMaster command a derived class of hello
SERVER-51303 Lookup stage followed by $match on type uses wrong field in matching condition
TOOLS-2590 [v3.6] sslAllowInvalidHostnames bypass ssl/tls server certification validation entirely

3.6.20 Changelog

Replication

SERVER-48967 Prevent replicated writes on empty namespaces on secondaries
SERVER-49990 Alias setSlaveOk() and getSlaveOk() shell helpers
SERVER-50039 Timing error in dbadmin.js test

Query

SERVER-36910 Reduce severity or remove log message for PlanExecutor::DEAD error during find
SERVER-39392 Invariant in PlanStage::dispose always evaluates as true
SERVER-48993 explodeForSort can produce incorrect query plan

Aggregation

SERVER-40317 $facet execution has no limit on how much memory it can consume

Storage

SERVER-49449 index_restart_secondary.js is not compatible with storage engines without support for persistence

Operations

SERVER-48244 Shell should not hard-code the allowed explain levels and let the server reject it instead

Build and Packaging

SERVER-33000 Platform Support: add Ubuntu 18.04
SERVER-42042 Warn or fail early on dynamic builds with toolchain compiler and tcmalloc
SERVER-49925 Dynamic builders should not combine the mongodbtoolchain with tcmalloc
SERVER-50124 Pin lazy-object-proxy python module

Internals

SERVER-33229 Overload startParallelShell in auto_retry_on_network_error.js to connect after loading the auto_retry_on_network_error.js override
SERVER-41600 IndexCatalog::refreshEntry should invalidate the index from the CollectionInfoCache
SERVER-43233 Add ability to request only specific attribute(s) for the LDAP groups
SERVER-45202 Improve Command alias infrastructure
SERVER-47930 Ubuntu 20.04 - ldap_authz_authn.js fails to load test certificate
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-49352 4.0 does not build with python 3.8
SERVER-49404 Enforce additional checks in $arrayToObject
SERVER-50180 Fix User lifetime management in AuthorizationManager::acquireUserForSessionRefresh

3.6.19 Changelog

Sharding

SERVER-46487 The mongos routing for scatter/gather ops can have unbounded latency
SERVER-47913 Redact sharding messages in split chunk and distributed lock acquisition

Replication

SERVER-45610 Some reads work while system is RECOVERING
SERVER-47695 Write commands run by threads that can survive rollback can fail operationTime invariant in ServiceEntryPoint

Query

SERVER-40805 Indicate the reason for replanning in the log file
SERVER-47994 Fix for numerical overflow in GeoHash

Storage

SERVER-46398 Suggest explicit dbpath when starting mongod on macOS and the default dbpath isn't found

Operations

SERVER-45295 Make sure that LDAP logs always contain context on AuthZN operation

Build and Packaging

SERVER-42042 Warn or fail early on dynamic builds with toolchain compiler and tcmalloc
SERVER-48640 Update RHEL 6.2 AMI for package tests
SERVER-48659 Update SLES 12 AMI for package tests
SERVER-48681 Update Debian 8.1 AMI for package tests

Internals

SERVER-45367 When the Range Deleter is waiting for the open cursors, list these cursors in the logs.
SERVER-45508 Invariant failure in getFieldsWithStringBounds with descending point ranges
SERVER-47256 Update listed maintainer for repo package files
SERVER-47686 Upgrade static OpenSSL to 1.1.1g
SERVER-47798 Audit isMaster response validation for mongod and mongos
SERVER-48032 Update references of community mailing-lists to MongoDB Developer Community Forums
SERVER-48657 Use evergreen module to control signal processing in perf projects
SERVER-49142 Validate correct field name in RoleName::parseFromBSON()
SERVER-49335 publish_packages should use barque API key
WT-5119 Birthmark records can be read as normal updates if reads race with checkpoints
WT-5150 LAS sweep is not removing the entries that are no longer required
WT-5196 Data mismatch failures with test/checkpoint after enabling LAS sweep
WT-5376 WT_UPDATE.type field can race with visibility checks when returning key/value pairs
WT-5587 Limit how many checkpoints are dropped by a subsequent checkpoint

3.6.18 Changelog

Security

SERVER-46834 Use monotonic time in UserCacheInvalidator

Sharding

SERVER-29153 Make sure replica set nodes agree on which node is primary before doing writes in ShardingTest initialization
SERVER-33597 Make allow_partial_results.js, return_partial_shards_down.js start shards as replica sets
SERVER-44130 Flip order of assert.lte arguments in logical_time_metadata.js
SERVER-45770 Add to information contained in logfile about "moveChunk.to"
SERVER-46466 Race with findAndModify retryable write and session migration

Replication

SERVER-35050 Don't abort collection clone due to negative document count
SERVER-35437 Wait for secondary state after stepdown command in multi_rs.js
SERVER-45178 Rollback via refetch can cause rollback to happen successfully w/o updating the rollback id.

Query

SERVER-32903 Ambiguous field name error should be ignored during initial sync
SERVER-45363 Issue with mongodb text indexes and weights when using wildcard specifier

Aggregation

SERVER-45418 DocumentSourceCursor batching memory accounting does not account for empty documents, leads to unbounded memory use for count-like aggregates

Storage

SERVER-45289 Conditional jump or move depends on uninitialised value(s) in validate_adaptor.cpp

Operations

SERVER-34199 "timing" section of serverStatus can have large impact on ftdc retention
SERVER-46024 Collect /proc/vmstat swap statistics in FTDC

Build and Packaging

SERVER-45713 Run rhel7 push and publish tasks on large rhel70 distro
SERVER-45732 Filter flags from net-snmp-config invocation more aggressively
SERVER-46983 Upload repobuilding packages to correct URL
SERVER-46996 all push/publish_packages tasks should run on small hosts

Internals

SERVER-30739 config_server_checks.js should assert if initial replSetConfig fails
SERVER-37148 Remove mr_shard_version.js and mr_during_migrate.js in favor of MR FSM test
SERVER-38119 Windows dump file naming does not account for dots in directory names
SERVER-40047 Test for blocking queue should not test for non-guaranteed condition
SERVER-40305 Add diagnostic logging to max_time_ms.js
SERVER-42278 Log SockAddrs produced during LDAP connection establishment with manually derived sizes
SERVER-42525 Single-node replica sets shouldn't wait for electable caught up secondaries during shutdown
SERVER-43349 Incorrect serialization for $elemMatch $not $ne
SERVER-44325 Add polyfill for certificate chain verification
SERVER-44435 Allow x509 authorization to be selectively enabled based on the CA
SERVER-44868 Initialsync logkeeper and logkeeper-short tests should pass snapshot ID and dataset link respectively to dsi(sys-perf)
SERVER-45156 SockAddr constructor should take sockaddr, not sockaddr_storage
SERVER-45472 Ensure RoleGraph can serialize authentication restrictions to BSON
SERVER-45766 Remove "requires" from the server yaml
SERVER-45867 Use latest version of signal processing
SERVER-45935 [3.6] WT error handler incorrectly prints "An unsupported journal format detected"
SERVER-46082 Use bin/analysis.py for performance projects
SERVER-46174 Free peer certificate in SSL_get0_verified_chain polyfill
SERVER-46754 Use new repobuilder service
SERVER-46766 Teardown clusters after every perf run
SERVER-46899 Fix tcmallocReleaseRate parameter in 4.0 and 3.6
SERVER-47063 Upgrade static OpenSSL to 1.1.1e
SERVER-47232 Ensure availability of Python ldap libraries

3.6.17 Changelog

Replication

SERVER-34876 initial_sync_with_write_load.js needs to await initial sync completion before reading oplog
SERVER-45396 fix the "me" field in isMaster responses when using splithorizon

Query

SERVER-42565 Aggregations and find commands sort missing fields differently

Aggregation

SERVER-42756 $multiply operator may return with or w/o an error depending on whether pipeline optimisation is enabled
SERVER-43764 Add more testing for special values in DoubleDoubleSummation
SERVER-44174 $push and $addToSet should restrict memory usage
SERVER-44733 Change stream should throw ChangeStreamFatalError if a single shard cannot be targeted for updateLookup
SERVER-44869 Add query knob to control memory limit for $push and $addToSet

Storage

SERVER-44796 Adjust nojournal startup warning to be more compelling

Build and Packaging

SERVER-37772 Platform Support: Add Community & Enterprise RHEL 8 x64
SERVER-44641 Platform Support: Remove Enterprise RHEL 7 zSeries and SLES 12 zSeries from 3.6

Internals

SERVER-34844 Relax expectations in apply_batches_totalMillis
SERVER-35099 Increase wtimeout in get_last_error.js even more
SERVER-35382 _isSelf command needs to be marked requiresAuth false
SERVER-38002 Upgrade Pcre to at least 8.42
SERVER-39131 Refactor storage engine lock file support
SERVER-42697 Expose tcmalloc_release_rate via setParameter
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-44568 Update the embedded version of the server's timezone data file to tzdb-2019c
SERVER-44828 Correct logic to re-compute dependencies after absorbing a $sort into query layer
SERVER-45104 [v3.6] Fix spill_to_disk.js
SERVER-45372 Blacklist versions without majority read concern for change_streams_update_lookup_shard_metadata_missing.js
WT-4636 Fix strace in syscall test
WT-5042 Reduce configuration parsing overhead from checkpoints
WT-5120 Checkpoint hangs when reconciliation doesn't release the eviction generation
WT-5135 Change lookaside file inserts to use cursor.insert
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

3.6.16 Changelog

Security

SERVER-44320 Allow zoned sharding commands to be authorized via actiontypes

Sharding

SERVER-42914 Implement random chunk selection policy for balancer for use in concurrency_*_with_balancer workloads

Replication

SERVER-43193 Always disable document validation on secondaries
SERVER-44675 server_status_metrics.js fails due to racy repl.buffer.count metric in serverStatus

Query

SERVER-44571 Documents involved in SERVER-44050 corruption scenario cannot be updated or deleted after upgrade

Storage

SERVER-44584 (3.6) Rewriting updates as modifications incorrectly considers logging state

Build and Packaging

SERVER-37769 Platform Support: Add Community & Enterprise SLES 15 x64
SERVER-44392 Platform Support: Remove zSeries ubuntu 16.04

Internals

SERVER-35463 Mark listCommands as pre-auth
SERVER-38002 Upgrade Pcre to at least 8.42
SERVER-40669 install_compass should not explicitly use python3
SERVER-42961 Fix Split Horizon testing on SLES
SERVER-43085 Regenerate all testing certificates with SHA-256 instead of SHA-1
SERVER-44140 Use signal processing without DSI
SERVER-44319 Skip keyfile check in replica_sets/auth1.js on windows
SERVER-44322 Fail gracefully when the storage engine has failed to initialize on v3.6
SERVER-44651 Update signal processing version
SERVER-44727 detect-changes should not be called via run-dsi

3.6.15 Changelog

Security

SERVER-43653 Upgrade static OpenSSL to 1.1.1d
SERVER-43751 Recompute compressor manager message parameters

Sharding

SERVER-10456 get cursor logic used to find docs to clone (in migration) is not same as in removeRange
SERVER-34760 Retries of _configsvrShardCollection may not send setShardVersion to primary shard
SERVER-36159 Log whenever the gossiped config server opTime term changes
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-38205 Optimize splitVector for the jumbo-chunk case
SERVER-42783 Migrations don't wait for majority replication of cloned documents if there are no transfer mods
SERVER-42793 Autosplit size tracker random initial value is too low
SERVER-44182 Blacklist major_version_check.js from sharding_last_stable suite in 3.6

Replication

SERVER-37846 writeConcern can be satisfied with an arbiter if the write was committed
SERVER-38685 Startup warning if In-Memory SE is used and writeConcernMajorityJournalDefault is true
SERVER-38994 Step down on SIGTERM
SERVER-39310 Check canServeReadsFor in getMores
SERVER-40335 Don't wait for election handoff in ReplSetTest.stopSet()
SERVER-40355 rs.config that contains an _id greater than the number of nodes will crash
SERVER-42155 Indicate term mismatches when readConcern times out
SERVER-43109 Explicitly state nodes in awaitReplication in do_not_advance_commit_point_beyond_last_applied_term.js
SERVER-43673 Blacklist toggle_feature_compatibility.js from backup_restore.js on 3.6
SERVER-43708 Wait for nodes to become secondary in last_vote.js and slave_delay_clean_shutdown.js

Query

SERVER-39019 $elemMatch $ne serialization is incorrect, doesn't roundtrip
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-43074 Do not use a global variable to encode 'multikeyPath' information when writing out catalog documents
SERVER-43699 Find $mod can result in UB

Aggregation

SERVER-43034 Special values handling is inconsistent in DoubleDoubleSummation

Storage

SERVER-42441 renameCollectionForApplyOps should always rename the target out of the way if it exists
SERVER-42652 Fix issue with rename collection
SERVER-43908 Modify IndexConsistency hash-map keys to avoid hitting an invariant on duplicate index keys in KeyString form for different indexes
SERVER-44188 [4.0] validate_tests should remove index entries by RecordId obtained from the cursor

WiredTiger

SERVER-35271 4.0 rc0 upgrade from 3.6.5 logs "unsupported WiredTiger file version" error
SERVER-39004 Introduce a quota mechanism for the overflow file
SERVER-40575 Improve error message when starting MongoDB 3.6 on unclean shutdown of MongoDB 4.0

Operations

SERVER-28604 Log when a cursor is reaped for exceeding the timeout
SERVER-40537 Log error code 261 for TooManyLogicalSessions to the mongodb.log
SERVER-42257 Add new shell startup banner
SERVER-43081 validate should report when an index's 'multikeyPaths' are set but the 'multikey' flag is false
SERVER-43350 The server crashes when trying to join collections ($ lookup with pipeline).

Build and Packaging

SERVER-42911 Rebuild mongodb by building.md and failed to build due to ModuleNotFoundError: No module named 'Cheetah' with MSVC on windows

Internals

SERVER-25025 Improve startup time when there are tens of thousands of collections/indexes on WiredTiger
SERVER-42075 Add DSI module to perf.yml
SERVER-42178 Disable Split Horizon HOSTALIAS testing on SLES
SERVER-42706 Test seeding secondary without sessions or transactions table
SERVER-42866 Trigger a logical session cache refresh on all shards in the ShardedCluster test fixture before running test
SERVER-42953 ttl_repl_secondary_disabled.js should prevent elections
SERVER-43151 Error in aggregation assertion at value.cpp:1368
SERVER-43240 Add DSI and mongo-perf modules to MMAP build variants in v4.0 mongo
SERVER-43634 Report different errors for missing scons and fail to import scons
SERVER-43922 ldap_authz_lib.js uses runNonMongoProgram on 3.6
SERVER-44064 Perform explicit cast on MessageCompressorManager parameter
SERVER-44183 Failure to listen on an asio socket should be fatal
SERVER-44184 De-duplicate resolved addresses on v3.6
SERVER-44312 Specify evergreen auth in performance tests for signal processing
WT-4869 Stop adding cache pressure when eviction is falling behind
WT-4881 Soften the restrictions on re-entering reconciliation
WT-4893 Fix a race between internal page child-page eviction checks and cursors in the tree
WT-4898 Don't allow the eviction server to reconcile if it's busy
WT-4956 Handle the case where 4 billion updates are made to a page without eviction
WT-4957 Revert part of a change about when pages are queued for urgent eviction
WT-5050 Assertion failure during urgent eviction of metadata page

3.6.14 Changelog

Security

SERVER-38945 SSL performance regression
SERVER-41069 Ability to disable authorization via x509 extensions
SERVER-41441 Upgrade static OpenSSL to 1.1.1c

Sharding

SERVER-26531 jumbo flag in chunk can be cleared when the shard that owns it donates a chunk
SERVER-36394 mongos should reset chunk size tracking information when autosplit = false or splitvector returns too few split points
SERVER-36443 Long-running queries should not cause a build-up of unused ChunkManager objects
SERVER-36469 shard_kill_and_pooling isn't querying the shard it's supposed to
SERVER-41859 logical_time_metadata.js shouldn't assume lastApplied opTime equals $clusterTime
SERVER-41867 CatalogCache::_scheduleDatabaseRefresh/_scheduleCollectionRefresh can try to grab _mutex it already owns
SERVER-41869 Reverse mutex acquisition order in CatalogCache::_scheduleCollectionRefresh
SERVER-42793 Autosplit size tracker random initial value is too low

Replication

SERVER-38659 Race condition in IsMasterIsFalseDuringStepdown unittest
SERVER-40336 ReplicationCoordinatorImpl::_random isn't robust to replica set members being started at the same time
SERVER-41036 Make ReadWriteAbility::_canAcceptNonLocalWrites AtomicWord<bool> to prevent torn reads.
SERVER-42055 Only acquire a collection IX lock to write the lastVote document

Query

SERVER-40134 Distinct command against a view can return incorrect results when the distinct path is multikey
SERVER-41065 Make agg evaluate() thread safe by passing 'Variables' as a parameter
SERVER-41829 findAndModify ignores filter expressions that are not objects

Storage

WiredTiger

SERVER-41913 Avoid in-place modify operations for logged collections

Operations

SERVER-36099 FTDC for mongos is unworkably large for large installations

Build and Packaging

SERVER-36043 systemd unit for mongod starts before multi.user target
SERVER-40563 Our init scripts check /proc/[pid]/stat should validate that (${procname}) is the process' command name.
SERVER-41424 scons should fail early if invoked with wrong Python interpreter
SERVER-41443 Update Enterprise License
SERVER-41743 Update MSI inclusions for 3.6
SERVER-42089 Platform Support: Remove Enterprise RHEL 6.7 zSeries from 3.4 and 3.6
SERVER-42109 Add Ubuntu 14.04 to v3.6
SERVER-42233 Bump Windows package dependencies
SERVER-42603 Recent service file change may cause cyclic dependencies

Internals

SERVER-26626 In external_auth_WT JSTests, ensure that Saslauthd has fully started before continuing test
SERVER-35067 Blacklist explain2.js from retryable writes jscore stepdown suite
SERVER-37984 Upgrade yaml-cpp >= 0.6.0
SERVER-38141 Incorrect usage of MONGO_CONFIG_HAS_SSL_SET_ECDH_AUTO prevents enabling of elliptic curve auto negotiation
SERVER-39642 Decrement egress counter when scoped connection not returned to the pool
SERVER-40156 Initial implementation of Split Horizon
SERVER-40643 Add tests for replSetConfig and replSetInitiate with Split Horizon
SERVER-40645 Add tests for SNI/TLS behavior of Split Horizon
SERVER-40923 Remove npm test command from "run jstestfuzz" Evergreen function
SERVER-40924 Add Evergreen task to sanity check fuzzer can parse JavaScript tests
SERVER-41004 killSessions command can return CursorNotFound error for successful kill
SERVER-41016 Calculate deltas for updates to large documents
SERVER-41075 Remove 'mongo/repl/replication_coordinator.h' from op-context inclusion path
SERVER-41148 FTDC is calling boost::filesystem without passing an error_code parameter
SERVER-41184 Add metrics to indicate the amount of sharded updates done with only _id in query
SERVER-41349 Add a log statement for slow dns resolution
SERVER-41401 patch_files.txt doesn't distinguish between enterprise and community files
SERVER-41442 Fix second race in umask.js
SERVER-41546 SysV init scripts should verify PIDfile exists instead of failing
SERVER-41624 Fix Split Horizons on Legacy Transport in v3.6
SERVER-41680 Propagate ${branch_name} Evergreen expansion to fuzzer invocation
SERVER-41753 Fix indexc.js to not depend on the clock always moving forward
SERVER-41789 sys-perf: Use bootstrap.overrides in bootstrap.yml config file
SERVER-41833 Update README license text
SERVER-41967 Symlink /data to Z instead of C
SERVER-42178 Disable Split Horizon HOSTALIAS testing on SLES
SERVER-42228 LoggerRuntimeConfigError exceptions can lead to background dbhash thread running until Evergreen task times out
WT-4352 Resolve birthmarks during eviction in more cases
WT-4421 Add a way to calculate modify operations
WT-4693 WT_CONNECTION::reconfigure should not require quiescence when downgraded
WT-4706 Add a statistic to track the lookaside table size
WT-4750 Sweep can remove active lookaside records when files are closed and re-opened
WT-4759 Save a copy when an old overflow value is discarded
WT-4768 Inconsistent data with lookaside eviction followed by sweep
WT-4769 Don't discard active history for empty pages
WT-4776 Modify operations should be equivalent to updates
WT-4794 Mark lookaside history resolved in all paths
WT-4803 Implement file_max configuration for Cache Overflow mechanism
WT-4823 Add check for uninitialised lookaside resources
WT-4848 Fix perf regression when calculating differences

3.6.13 Changelog

Security

SERVER-40226 Upgrade static OpenSSL to 1.1.1b
SERVER-40393 Disable SSL_MODE_RELEASE_BUFFERS in ASIO

Sharding

SERVER-36004 SessionUpdateTracker should ignore no-op entries for pre/post image oplogs
SERVER-36457 mongos_rs_shard_failure_tolerance.js test should assert that the movePrimary command succeeds
SERVER-39420 Remove in-memory boolean to indicate config.server.sessions collection set up
SERVER-40136 The background key generator can remain disabled on fCV upgrade after a downgrade

Replication

SERVER-35636 Renaming collection for applyOps needs to check completeness of target namespace
SERVER-37065 Report ismaster:false in isMaster command response immediately upon learning of a new term
SERVER-39831 Never update commit point beyond last applied if learned from sync source
SERVER-40628 Initial sync could fail under replsetprio1.js settings
SERVER-40788 Improve logging around replication catchup
SERVER-40977 mmapv1 and ephemeralForTest variants should exclude tests with requires_majority_read_concern tag
SERVER-41081 do_not_advance_commit_point_beyond_last_applied_term.js must wait for Node E to reach stopReplProducerOnDocument failpoint
SERVER-41247 do_not_advance_commit_point_beyond_last_applied_term.js must not run with periodic noop writer on
SERVER-41342 read_committed_stale_history.js must perform continuous writes to ensure majority commit point propagates to secondary

Storage

SERVER-16571 Use Actual Memory Constraint vs. Total System Memory When They Differ
SERVER-30356 Improve error reporting for validation
SERVER-41213 Unique background index builds may produce inconsistent keys

Operations

SERVER-39820 Add the client IP address to the successful authentication log message
SERVER-40866 Use JSON.stringify() to serialize string in tojson()

Build and Packaging

SERVER-37765 Platform Support: Remove Ubuntu 14.04
SERVER-37774 Platform Support: Remove Enterprise Ubuntu 16.04 PPCLE
SERVER-40242 Update banner inclusions for vendored tools
SERVER-40491 Update Debian 8 image for package test

Internals

SERVER-37382 printShardingStatus.js races with ShardingUptimeReporter thread
SERVER-38984 Attach IDs to users
SERVER-39746 System-Performance: Write project in runtime.yml
SERVER-40052 Shutdown in mongos can trigger BatchWriteOp invariant
SERVER-40165 generate wtimeout deadlines with the precise clock
SERVER-40514 Race between BufferedHandler.close() and BufferedHandler.flush() leads to resmoke.py hanging with --log=buildlogger
SERVER-40922 Add npm install command to "run jstestfuzz" Evergreen function
SERVER-40932 Increase timeout for shutting down the ServiceExecutor
SERVER-41088 Propagate Evergreen order field to Cedar for system perf
SERVER-41103 Fix fuzzer task invocations
SERVER-41169 Most powercycle testing for Linux was removed from Evergreen
TOOLS-2068 mongodump oplog delay

3.6.12 Changelog

Sharding

SERVER-35219 Regain MongoDB balancer performance with sessions
SERVER-39847 Migrating session info can trigger fassert when destination shard has transaction history truncated by oplog
SERVER-39932 SessionRuntimeInfo memory is not being released

Replication

SERVER-37255 replSetReconfig with concurrent election can trigger invariant
SERVER-38722 CollectionCloner should handle QueryPlanKilled on collection drop
SERVER-39490 opWriteConcernCounters can cause undefined behavior due to overflow
SERVER-39641 Blacklist max_time_ms.js from read concern linearizable passthrough
SERVER-39758 double_rollback.js should reliably wait for node 0 to complete rollback
SERVER-40039 Increase assert.soon timeout in initial_sync_invalid_index_spec.js

Query

SERVER-38764 External sorter should use 64-bit integers for file offsets

Aggregation

SERVER-39394 Views collation check should traverse through nested $lookup pipelines
SERVER-39487 Aggregation operator $sqrt output for NumberDecimal is the same as $exp

Storage

SERVER-17010 Reduce file handle usage in File based Sorter
SERVER-39773 decrease number of updates in rollback_wt_cache_full.js

Operations

SERVER-37722 Quiet mode does not suppress connection end events
SERVER-40131 Incorrect format string in Windows stacktrace generator.
SERVER-40259 Include third party notices for ASIO and variant

Build and Packaging

SERVER-36622 Package tests fail for newer Ubuntu

Tools

TOOLS-2229 Mongofiles deletes chunks of existing file when failing to put_id with existing _id

Internals

SERVER-36231 Mongos write path doesn't look for retryable write concern errors
SERVER-36437 The dbstats command should lock the database in MODE_IS instead of MODE_S
SERVER-36750 blacklist memory.js on ppc64le in memory variants
SERVER-37620 Improve watchdog_test reliability
SERVER-38644 Guard against ephemeral files disappearing during umask test
SERVER-38697 Powercycle kill by PID might try to kill the wrong process
SERVER-38789 Accept connection failure on Windows in ssl_alert_reporting.js
SERVER-39056 Further refine readWriteAnyDatabase
SERVER-39058 Synchronize user set modification in AuthorizationSession with Client
SERVER-39822 Improve watchdog_test.exe test reliability
SERVER-40063 jstestfuzz_sharded_continuous_stepdown.yml is running with a 1-node CSRS on the 3.6 branch
SERVER-40076 Tag JavaScript tests with the reason they're unable to run in Atlas
WT-4324 Ensure checkpoints rewrite pages with data in the future
WT-4615 Sync backup file before returning backup cursor

3.6.11 Changelog

Security

SERVER-36606 Remove size limits on BSON audit events

Sharding

SERVER-9043 Link flushRouterConfig on the config server and shards
SERVER-31156 Admin command to update the chunk metadata for only one collection
SERVER-36863 query_config.js assumes that config.mongos is always present
SERVER-36901 sh.status() "Last reported error:" is actually 5th Latest error message
SERVER-37339 Sharding state is set to initialized on Grid before sharding components are fully initialized
SERVER-37624 Sessions never expire when you change value of localLogicalSessionTimeoutMinutes
SERVER-38192 Ignore duplicate key error from refreshLogicalSessionCacheNow
SERVER-38344 Early release of distributed database locks during initial collection sharding results in migration/split failures
SERVER-38387 agg_out.js concurrency workload always fails to shard the output collection
SERVER-38784 Blacklist verify_sessions_expiration_sharded.js from the sharding_last_stable_mongos_and_mixed_shards suite.
SERVER-39030 Wrong info logged by splitVector

Replication

SERVER-32146 Log slow oplog entry application
SERVER-35608 Invariant that term from lastAppliedOptime is never greater than our current term
SERVER-37274 commands_that_accept_wc tests can give secondaries priority zero
SERVER-37910 Create new serverStatus metric for number of operations applied on a secondary that's incremented at batch boundaries
SERVER-37915 Replication doesn't update opsCounterRepl command on secondaries
SERVER-38200 Fix ./jstests/replsets/initial_sync_oplog_hole.js to prevent using stale heartbeat info in the test.
SERVER-38647 backup_restore_rolling.js can fail due to stepdown
SERVER-38998 Create serverStatus metrics for readConcern and writeConcern
SERVER-39142 ServerWriteConcernMetrics must lock _mutex before modifying members
SERVER-39267 Guard opWriteConcernCounters behind flag
SERVER-39286 server_write_concern_metrics.js must use requires_journaling tag

Query

SERVER-38275 Handle explains without namespaces
SERVER-39472 Backport changes to apply_ops_concurrent_non_atomic.js to account for HMAC key inserts in 3.6 and 4.0.

Aggregation

SERVER-31098 Wrong ns in system.profile for aggregation query
SERVER-39109