mongodb · andf-mongodb · Jan 14, 2021 · Jan 14, 2021
diff --git a/source/includes/changelogs/releases/4.2.12.rst b/source/includes/changelogs/releases/4.2.12.rst
@@ -0,0 +1,84 @@
+.. _4.2.12-changelog:
+
+4.2.12 Changelog
+----------------
+
+Sharding
+~~~~~~~~
+
+- :issue:`SERVER-46393` Always check client last operation time when computing operationTime to append to the response
+- :issue:`SERVER-50900` Disable PeriodicShardedIndexConsistencyChecker for cursor_valid_after_shard_stepdown.js 
+- :issue:`SERVER-52732` Uptime reporter disables autosplit during ShardingTest initialization
+- :issue:`SERVER-53444` Make tests that run removeShard in assert.soon to wait for the state to become "completed" not error on ShardNotFound
+
+Replication
+~~~~~~~~~~~
+
+- :issue:`SERVER-49187`  Make ReplSetTest .stepUp() robust to election failures.
+- :issue:`SERVER-50049` assert.soonNoExcept() should not access TestData.traceExceptions for non-resmoke tests.
+- :issue:`SERVER-50416` Change notMasterLegacyUnacknowledgedWrites to notPrimaryLegacyUnacknowledgedWrites in serverStatus
+- :issue:`SERVER-50417` Change notMasterUnacknowledgedWrites to notPrimaryUnacknowledgedWrites in serverStatus
+- :issue:`SERVER-50869` Background sync may erroneously set applied-through during step-up
+- :issue:`SERVER-50901` RollbackTest should wait for secondaries before doing data consistency checks
+- :issue:`SERVER-52560` oplog_writes_only_permitted_on_standalone.js must wait for insert to be in stable checkpoint
+- :issue:`SERVER-52680` Removed node on startup stuck in STARTUP2 after being re-added into the replica set
+- :issue:`SERVER-52744` rollback node's lastApplied > sync source's lastApplied in rollback_after_enabling_majority_reads.js
+- :issue:`SERVER-53026` Secondary cannot restart replication
+- :issue:`SERVER-53345` Excuse arbiter_new_hostname.js from multiversion tests
+
+Query
+~~~~~
+
+- :issue:`SERVER-32960` $mod has inconsistent rounding/truncation behavior
+- :issue:`SERVER-40361` Reduce memory footprint of plan cache entries
+- :issue:`SERVER-50769` server restarted after expr：{"expr":"_currentApplyOps.getArrayLength() > 0","file":"src/mongo/db/pipeline/document_source_change_stream_transform.cpp","line":535}}
+
+Aggregation
+~~~~~~~~~~~
+
+- :issue:`SERVER-34741` Move $match in front of $group if condition is on group key
+- :issue:`SERVER-40090` DISTINCT_SCAN in agg is only used when certain format of _id is specified
+- :issue:`SERVER-51886` $lookup + $merge pipeline may fail to resolve views correctly when collection names collide
+
+Storage
+~~~~~~~
+
+- :issue:`SERVER-47812` Secondaries persist wildcard multikeypaths out of order
+- :issue:`SERVER-48471` Hashed indexes may be incorrectly marked multikey and be ineligible as a shard key
+- :issue:`SERVER-51858` Investigate queryable issue on 4.0.20
+- :issue:`SERVER-52950` recoverOplogAsStandalone mode must not start oplog truncater thread
+- :issue:`SERVER-53703` [4.2] Opening a transaction at the all durable timestamp can go backwards
+
+Build and Packaging
+~~~~~~~~~~~~~~~~~~~
+
+:issue:`SERVER-52891` Run PPC builds less frequently
+
+Internals
+~~~~~~~~~
+
+- :issue:`SERVER-41836` Log thread Id as part of error in FSM tests
+- :issue:`SERVER-43739` SNI name is not set on OSX if allowInvalidHostnames is enabled
+- :issue:`SERVER-44375` fix merge_with_drop_shard.js when the curop command fails due to ShardNotFound
+- :issue:`SERVER-47863` Initial Sync Progress Metrics
+- :issue:`SERVER-48742` Log whenever profiler settings are changed via setProfilingLevel
+- :issue:`SERVER-50267` Set output limit for 'rawMongoProgramOutput()'
+- :issue:`SERVER-50445` Return the value as double when NumberLong subtraction overflows in ExpressionSubtract
+- :issue:`SERVER-51526` Hybrid index builds can miss writes and crash in the event of a well-timed WriteConflictException
+- :issue:`SERVER-51607` Upgrade Twisted dependency to at least twisted-19.7.0
+- :issue:`SERVER-52618` Sparse hash index should not be used for equality to null match
+- :issue:`SERVER-52646` Validate and possibly fix edge cases in regex rewrite rules for userToDNMapping
+- :issue:`SERVER-52654` new signing keys not generated by the monitoring-keys-for-HMAC thread
+- :issue:`SERVER-52806` deb install files assume systemd
+- :issue:`SERVER-52879` Periodic operation latency spikes every 5 minutes due to closing idle cached WT sessions
+- :issue:`SERVER-52919` Wire compression not enabled for initial sync
+- :issue:`SERVER-52929` Correctly handle compound indexes with 32 keys
+- :issue:`SERVER-52969` Disable Powercyle on non-master branches
+- :issue:`SERVER-52975` Fix use of 'onRollback' callback for collection validator options in 'collection_impl.cpp'
+- :issue:`SERVER-53233` Fix change_streams_update_lookup_shard_metadata_missing.js [4.2, 4.0]
+- :issue:`SERVER-53234` jstests/core/profile2.js fails when background operations are run against test database
+- :issue:`WT-6835` Add API to allow consolidating incremental backup info
+- :issue:`WT-6839` Add API to query existing incremental backup IDs
+- :issue:`WT-6882` Files created during incremental backup should be copied in full
+- :issue:`WT-6922` Add random consolidate testing to incr_backup
+
diff --git a/source/release-notes/4.2-changelog.txt b/source/release-notes/4.2-changelog.txt
@@ -10,6 +10,8 @@
    :depth: 1
    :class: singlecol
 
+.. include:: /includes/changelogs/releases/4.2.12.rst
+
 .. include:: /includes/changelogs/releases/4.2.11.rst
 
 .. include:: /includes/changelogs/releases/4.2.10.rst

diff --git a/source/release-notes/4.2.txt b/source/release-notes/4.2.txt
@@ -17,6 +17,31 @@ Release Notes for MongoDB 4.2
 Minor Releases
 --------------
 
+.. _4.2.12-release-notes:
+
+4.2.12 - Upcoming
+~~~~~~~~~~~~~~~~~
+
+Issues fixed in 4.2.12:
+
+
+- :issue:`SERVER-40361`: Reduce memory footprint of plan cache entries
+
+- :issue:`SERVER-47863`: Initial Sync Progress Metrics
+
+- :issue:`SERVER-48471`: Hashed indexes may be incorrectly marked multikey and be ineligible as a shard key
+
+- :issue:`SERVER-50769`: server restarted after expr{"expr":"_currentApplyOps.getArrayLength() > 0","file":"src/mongo/db/pipeline/document_source_change_stream_transform.cpp","line":535}}
+
+- :issue:`SERVER-52654`: new signing keys not generated by the monitoring-keys-for-HMAC thread
+
+- :issue:`SERVER-52879`: Periodic operation latency spikes every 5 minutes due to closing idle cached WT sessions
+
+- `All JIRA issues closed in 4.2.12
+  <https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%274.2.12%27>`__
+
+- :ref:`4.2.12-changelog`
+
 .. _4.2.11-release-notes:
 
 4.2.11 - Nov 18, 2020