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(DOCS-13820): 4.0.20 changelog
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‎source/includes/changelogs/releases/4.0.20.rst

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.. _4.0.20-changelog:
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4.0.20 Changelog
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----------------
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Sharding
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~~~~~~~~
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- :issue:`SERVER-40441` Arbiter nodes log error messages when try to create session collection or check if it exists
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- :issue:`SERVER-44115` Exclude jstests/core/autocomplete.js from sharded jscore tests
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- :issue:`SERVER-47799` AsyncRequestsSender should update replica set monitor in between retries for InterruptedAtShutdown
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- :issue:`SERVER-48491` Add requires_document_locking tag to sessions_collection_reaping.js
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- :issue:`SERVER-48674` Check if replication is enabled before checking if the node is an arbiter in LogicalSessionCacheImpl
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- :issue:`SERVER-48926` Fix remaining sharding tests that incorrectly set votes to 0 on shard secondaries
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- :issue:`SERVER-49233` Introduce a flag to toggle the logic for bumping collection's major version during split
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Replication
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~~~~~~~~~~~
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- :issue:`SERVER-37390` RollbackTestFixture doesn't need to wait for a new primary if it didn't shut down the current primary
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- :issue:`SERVER-42004` localhost{1,2,3}.js tests should wait for a primary to be elected before shutting down the test
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- :issue:`SERVER-45610` Some reads work while system is RECOVERING
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- :issue:`SERVER-46897` REMOVED node may never send heartbeat to fetch newest config
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- :issue:`SERVER-47849` Add more logging to shutdownTask
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- :issue:`SERVER-48276` ReplSet Free Monitoring URLs inconsistent
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- :issue:`SERVER-48967` Prevent replicated writes on empty namespaces on secondaries
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- :issue:`SERVER-50039` Timing error in dbadmin.js test
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Query
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~~~~~
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- :issue:`SERVER-47223` geoNear/$geoNear does not apply index hints
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- :issue:`SERVER-48993` explodeForSort can produce incorrect query plan
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- :issue:`SERVER-49527` recoverFromOplogAsStandalone does not relax index constraints
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Storage
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~~~~~~~
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- :issue:`SERVER-43097` Improve log messaging when index builds get foregrounded because of startup recovery
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- :issue:`SERVER-47694` fix multikey. again
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- :issue:`SERVER-48453` Lazily initialize a record store's auto incrementing counter on deletes
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- :issue:`SERVER-48695` setAppliedThrough must set orderedCommit=false on the recovery unit
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- :issue:`SERVER-49449` index_restart_secondary.js is not compatible with storage engines without support for persistence
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Operations
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~~~~~~~~~~
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- :issue:`SERVER-44051` getShardDistribution() does not report "Collection XYZ is not sharded" on dropped but previously sharded collections
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- :issue:`SERVER-48244` Shell should not hard-code the allowed explain levels and let the server reject it instead
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Build and Packaging
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~~~~~~~~~~~~~~~~~~~
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- :issue:`SERVER-42042` Warn or fail early on dynamic builds with toolchain compiler and tcmalloc
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- :issue:`SERVER-46927` Clarify dependencies for release-related tasks
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- :issue:`SERVER-48329` Adjust naming of action_type.h on either master or all stable branches
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- :issue:`SERVER-48640` Update RHEL 6.2 AMI for package tests
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- :issue:`SERVER-48659` Update SLES 12 AMI for package tests
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- :issue:`SERVER-48681` Update Debian 8.1 AMI for package tests
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- :issue:`SERVER-49925` Dynamic builders should not combine the mongodbtoolchain with tcmalloc
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- :issue:`SERVER-50124` Pin lazy-object-proxy python module
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Internals
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~~~~~~~~~
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- :issue:`SERVER-33229` Overload startParallelShell in auto_retry_on_network_error.js to connect after loading the auto_retry_on_network_error.js override
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- :issue:`SERVER-41600` IndexCatalog::refreshEntry should invalidate the index from the CollectionInfoCache
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- :issue:`SERVER-42908` Add ErrorCodes to retryable errors to match drivers
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- :issue:`SERVER-46758` setFCV can be interrupted before an FCV change is majority committed and rollback the FCV without running the setFCV server logic
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- :issue:`SERVER-47930` Ubuntu 20.04 - ldap_authz_authn.js fails to load test certificate
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- :issue:`SERVER-48032` Update references of community mailing-lists to MongoDB Developer Community Forums
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- :issue:`SERVER-48107` Retry replSetStepDown in rollback_test.js
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- :issue:`SERVER-48514` Separate testing 'called' and 'successful' fields for serverStatus election metrics
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- :issue:`SERVER-48569` Add ConflictingOperationInProgress as acceptable error code to stepDown in validateCollectionsCallback
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- :issue:`SERVER-48657` Use evergreen module to control signal processing in perf projects
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- :issue:`SERVER-49007` Roundtrip registration id in metrics response in mock_http_server.py
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- :issue:`SERVER-49071` Make ldap_fastest_host_selection.js tolerate missing LDAP servers in statistics
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- :issue:`SERVER-49142` Validate correct field name in RoleName::parseFromBSON()
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- :issue:`SERVER-49335` publish_packages should use barque API key
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- :issue:`SERVER-49404` Enforce additional checks in $arrayToObject
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- :issue:`WT-5242` Minimize checkpoints pinned during backup
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- :issue:`WT-6118` Fix missing checkpoint in backup
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- :issue:`WT-6141` Disable checkpoint deletion during backup
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‎source/release-notes/4.0-changelog.txt

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.. include:: /includes/changelogs/releases/4.0.20.rst
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.. include:: /includes/changelogs/releases/4.0.19.rst
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.. include:: /includes/changelogs/releases/4.0.18.rst
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.. include:: /includes/changelogs/releases/4.0.2.rst
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.. include:: /includes/changelogs/releases/4.0.1.rst
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.. include:: /includes/changelogs/releases/4.0.1.rst

‎source/release-notes/4.0.txt

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Minor Releases
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--------------
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.. _4.0.20-release-notes:
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4.0.20 - Upcoming
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~~~~~~~~~~~~~~~~~
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Issues fixed:
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- :issue:`SERVER-44051` getShardDistribution() does not report
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"Collection XYZ is not sharded" on dropped but previously sharded
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collections
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- :issue:`SERVER-45610` Some reads work while system is RECOVERING
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- :issue:`SERVER-46758` setFCV can be interrupted before an FCV change
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is majority committed and rollback the FCV without running the setFCV
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server logicbumping collection's major version during split
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- :issue:`SERVER-47799` AsyncRequestsSender should update replica set
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monitor in between retries for InterruptedAtShutdown
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- :issue:`SERVER-49233` Introduce a flag to toggle the logic for
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bumping collection's major version during split
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- `All JIRA issues closed in 4.0.20
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<https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%274.0.20%27>`_
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- :ref:`4.0.20-changelog`
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.. _4.0.19-release-notes:
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4.0.19 - Jun 15, 2020
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~~~~~~~~~~~~~~~~~~~~~
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Issues fixed:
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- :issue:`SERVER-42525`: Single-node replica sets shouldn't wait for electable caught up secondaries during shutdown
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- :issue:`SERVER-47233`: WriteOp can be left in pending state, leading to erroneous NoProgressMade write error from mongos
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- :issue:`SERVER-46758`: setFCV can be interrupted before an FCV change is majority committed and rollback the FCV without running the setFCV server logic
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- :issue:`SERVER-46487`: The mongos routing for scatter/gather ops can have unbounded latency
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- :issue:`SERVER-42862`: Prevent shard refreshes in mergeChunks command from joining earlier refreshes
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- :issue:`SERVER-42525` Single-node replica sets shouldn't wait for
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electable caught up secondaries during shutdown
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- :issue:`SERVER-42862` Prevent shard refreshes in mergeChunks command
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from joining earlier refreshes
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- :issue:`SERVER-46487` The mongos routing for scatter/gather ops can
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have unbounded latency
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- :issue:`SERVER-46758` setFCV can be interrupted before an FCV change
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is majority committed and rollback the FCV without running the setFCV
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server logic
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- :issue:`SERVER-47233` WriteOp can be left in pending state, leading
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to erroneous NoProgressMade write error from mongos
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- `All JIRA issues closed in 4.0.19
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<https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%274.0.19%27>`_

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