DOCSP-30985 BACKPORT (#3450)

Author: Dave Cuthbert

source/core/sharded-cluster-query-router.txt

@@ -359,7 +359,7 @@ Metadata Operations
 Additional Information
 ----------------------
 
-FCV Compatibility
+fCV Compatibility
 ~~~~~~~~~~~~~~~~~
 
 .. include:: /includes/fact-mongos-fcv.rst

source/core/transactions.txt

@@ -794,7 +794,7 @@ MongoDB provides various transactions metrics:
 
 ..  _transactions-fcv:
 
-Feature Compatibility Version (FCV)
+Feature Compatibility Version (fCV)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 To use transactions, the :ref:`featureCompatibilityVersion <view-fcv>`

source/includes/3.6-featureCompatibility-copy-data.rst

@@ -1,11 +1,11 @@
 You cannot copy data between a MongoDB 4.0 :binary:`~bin.mongod`
-instance with :ref:`featureCompatibilityVersion (FCV) <view-fcv>` 4.0
+instance with :ref:`featureCompatibilityVersion (fCV) <view-fcv>` 4.0
 and a MongoDB version 3.6 :binary:`~bin.mongod` instance.
 
 .. note::
 
    You cannot copy data between a MongoDB 4.0 :binary:`~bin.mongod`
-   instance (regardless of the FCV value) and a MongoDB 3.4 and earlier
+   instance (regardless of the fCV value) and a MongoDB 3.4 and earlier
    :binary:`~bin.mongod` instance.
 
 For example:
@@ -17,28 +17,28 @@ For example:
      - Instance 2
      - 
 
-   * - Version 4.0 ``mongod`` with FCV 4.0
-     - Version 4.0 ``mongod`` with FCV 4.0
+   * - Version 4.0 ``mongod`` with fCV 4.0
+     - Version 4.0 ``mongod`` with fCV 4.0
      - Can copy data.
 
-   * - Version 4.0 ``mongod`` with FCV 4.0
-     - Version 4.0 ``mongod`` with FCV 3.6
+   * - Version 4.0 ``mongod`` with fCV 4.0
+     - Version 4.0 ``mongod`` with fCV 3.6
      - Can copy data.
 
-   * - Version 4.0 ``mongod`` with FCV 4.0
-     - Version 3.6 ``mongod`` with FCV 3.6
+   * - Version 4.0 ``mongod`` with fCV 4.0
+     - Version 3.6 ``mongod`` with fCV 3.6
      - Cannot copy data.  Instance 2 must be a MongoDB version 4.0
 
-   * - Version 4.0 ``mongod`` with FCV 3.6
-     - Version 3.6 ``mongod`` with FCV 3.6
+   * - Version 4.0 ``mongod`` with fCV 3.6
+     - Version 3.6 ``mongod`` with fCV 3.6
      - Can copy data.
 
-   * - Version 4.0 ``mongod`` with FCV 3.6
-     - Version 3.6 ``mongod`` with FCV 3.4
+   * - Version 4.0 ``mongod`` with fCV 3.6
+     - Version 3.6 ``mongod`` with fCV 3.4
      - Can copy data.
 
 In general, if the :binary:`~bin.mongod` instance has its
-:ref:`featureCompatibilityVersion (FCV) <view-fcv>` set to its MongoDB
+:ref:`featureCompatibilityVersion (fCV) <view-fcv>` set to its MongoDB
 version, you cannot copy data between that instance and a
 :binary:`~bin.mongod` instance of an earlier MongoDB version.
 

source/includes/arbiter-fcv-version.rst

@@ -1,3 +1,3 @@
 
-For example, an arbiter in a MongoDB |newversion| cluster, has an FCV
+For example, an arbiter in a MongoDB |newversion| cluster, has an fCV
 value of |oldversion|.

source/includes/arbiter-fcv.rst

@@ -1,5 +1,5 @@
 
 Arbiters do not replicate the :data:`admin.system.version` collection.
 Because of this, arbiters always have a Feature Compatibility Version equal
-to the downgrade version of the binary, regardless of the FCV value of the
+to the downgrade version of the binary, regardless of the fCV value of the
 replica set.

source/includes/change-stream/id.rst

@@ -12,7 +12,7 @@ The ``_id`` object has the following form:
    }
 
 The ``_data`` type depends on the MongoDB versions
-and, in some cases, the :ref:`feature compatibility version (FCV)
+and, in some cases, the :ref:`feature compatibility version (fCV)
 <view-fcv>` at the time of the change stream's
 opening or resumption. See :ref:`change-stream-resume-token` for the
 full list of ``_data`` types.

source/includes/changelogs/releases/3.4.18.rst

@@ -63,5 +63,5 @@ Internals
 - :issue:`SERVER-37424` Sys-perf: change v4.0 branch batch time to once a week
 - :issue:`SERVER-37425` Longevity tests -- increase batch time to once a year
 - :issue:`SERVER-37437` mongo longevity tests failing 
-- :issue:`SERVER-37647` Validation hook sets FCV to 3.4 no matter what version it currently is
+- :issue:`SERVER-37647` Validation hook sets fCV to 3.4 no matter what version it currently is
 

source/includes/changelogs/releases/3.4.19.rst

@@ -68,7 +68,7 @@ Internals
 - :issue:`SERVER-23818` Include Evergreen task ID in metadata sent to logkeeper
 - :issue:`SERVER-36250` Add support for optionally logging specific negotiated TLS versions 
 - :issue:`SERVER-37120` Turn off linux-replSet-initialsync-logkeeper Build Variant for 3.4 and 3.6 branches
-- :issue:`SERVER-37647` Validation hook sets FCV to 3.4 no matter what version it currently is
+- :issue:`SERVER-37647` Validation hook sets fCV to 3.4 no matter what version it currently is
 - :issue:`SERVER-37913` coll_epoch_test1.js does not wait for the config server to replicate after dropping collections.
 - :issue:`TOOLS-1566` Should not include "ssl" tag for Linux 64 build
 - :issue:`TOOLS-1742` import cycle between util and testutil

source/includes/changelogs/releases/3.6.13.rst

@@ -15,7 +15,7 @@ Sharding
 - :issue:`SERVER-36004` SessionUpdateTracker should ignore no-op entries for pre/post image oplogs
 - :issue:`SERVER-36457` mongos_rs_shard_failure_tolerance.js test should assert that the movePrimary command succeeds
 - :issue:`SERVER-39420` Remove in-memory boolean to indicate config.server.sessions collection set up
-- :issue:`SERVER-40136` The background key generator can remain disabled on FCV upgrade after a downgrade
+- :issue:`SERVER-40136` The background key generator can remain disabled on fCV upgrade after a downgrade
 
 Replication
 ~~~~~~~~~~~

source/includes/changelogs/releases/3.6.3.rst

@@ -85,7 +85,7 @@ Storage
 - :issue:`SERVER-32533` In oplog truncate with WT, don't use a start key
 - :issue:`SERVER-32573` Skip wt_delayed_secondary_read_concern_majority.js when running with WiredTiger's LSM tree
 - :issue:`SERVER-32637` Ensure that upgrading to 3.6 when on pv0 doesn't break if you don't explicitly turn off readConcernMajority
-- :issue:`SERVER-32851` setFeatureCompatibilityVersion can race with createCollection such that FCV 3.6 is set and some collections do not have UUIDs
+- :issue:`SERVER-32851` setFeatureCompatibilityVersion can race with createCollection such that fCV 3.6 is set and some collections do not have UUIDs
 
 Operations
 ~~~~~~~~~~
@@ -125,7 +125,7 @@ Internals
 - :issue:`SERVER-32169` A cursor created with a session cannot be killed outside that session
 - :issue:`SERVER-32197` Remote host is missing the debug symbols for hang_analyzer in evergreen.yml
 - :issue:`SERVER-32203` Log the remote EC2 instance status when a failure to access it is detected in evergreen.yml
-- :issue:`SERVER-32205` Dropping admin db sets FCV to 3.4 but leaves UUIDs
+- :issue:`SERVER-32205` Dropping admin db sets fCV to 3.4 but leaves UUIDs
 - :issue:`SERVER-32222` change_streams_primary_shard_unaware.js needs to be marked as requiring persistence
 - :issue:`SERVER-32228` Powercycle - handle remote host restarts
 - :issue:`SERVER-32243` Add an option to have the validate hook skip some collections.

source/includes/changelogs/releases/3.6.4.rst

@@ -15,7 +15,7 @@ Sharding
 - :issue:`SERVER-32885` Overlap chunk clone application on the donor with fetching documents from the recipient
 - :issue:`SERVER-32886` Unnecessary sleeps during chunk migration
 - :issue:`SERVER-33189` Unblacklist sharding tests marked as requiring already released last-stable versions
-- :issue:`SERVER-33763` 3.6 drivers fail to communicate with 3.6 sharded clusters running at FCV 3.4
+- :issue:`SERVER-33763` 3.6 drivers fail to communicate with 3.6 sharded clusters running at fCV 3.4
 - :issue:`SERVER-33869` make $changeStream on shards check shardVersion
 - :issue:`SERVER-33971` Nodes in MongoDB sharded cluster crashes with Invariant failure oplogEntry.getWallClockTime()
 

source/includes/changelogs/releases/3.6.5.rst

@@ -14,7 +14,7 @@ Sharding
 
 - :issue:`SERVER-32681` exact_shard_key_target.js moveChunk should wait for delete
 - :issue:`SERVER-33585` Do not return $clusterTime when no keys are available
-- :issue:`SERVER-33714` Downgrading FCV from 3.6 to 3.4 leaves an admin.system.keys collection on shards that on upgrade is orphaned and renamed without a UUID
+- :issue:`SERVER-33714` Downgrading fCV from 3.6 to 3.4 leaves an admin.system.keys collection on shards that on upgrade is orphaned and renamed without a UUID
 - :issue:`SERVER-33766` Secondary may not invalidate in-memory routing table cache after primary refresh
 - :issue:`SERVER-34098` Move chunk_manager_refresh_bm from unit test to perf microbenchmark
 - :issue:`SERVER-34347` Batch write with ranged query predicate mixed with single target triggers invariant on mongos
@@ -135,7 +135,7 @@ Internals
 - :issue:`SERVER-34742` Stop running ssl_cert_password.js on OS X
 - :issue:`SERVER-34823` Thread name and connection number are not synchronized in TransportLayerLegacy
 - :issue:`SERVER-34827` retryable writes not in sys-perf-3.6 project
-- :issue:`SERVER-34834` Wait for replication of FCV document before downgrading binaries in clear_and_reinstate_keys_rs.js
+- :issue:`SERVER-34834` Wait for replication of fCV document before downgrading binaries in clear_and_reinstate_keys_rs.js
 - :issue:`SERVER-34929` Fix malformed preprocessor macro check
 - :issue:`TOOLS-1941` Tools qa-tests often timeout, particularly on server latests
 - :issue:`TOOLS-1978` tools fail eslint testing

source/includes/changelogs/releases/3.6.6.rst

@@ -22,7 +22,7 @@ Sharding
 - :issue:`SERVER-34833` Deadlock between the logical sessions' transaction reaper and MMAP V1 durability thread
 - :issue:`SERVER-34857` ``sharding_legacy_api_test`` is flaky due to reliance on the system clock
 - :issue:`SERVER-35006` Do not reset KeysCollectionManager
-- :issue:`SERVER-35345` Test that restarted mongoses are able to connect after FCV update
+- :issue:`SERVER-35345` Test that restarted mongoses are able to connect after fCV update
 - :issue:`SERVER-35609` Create initial chunk on primaryShard if only writing one chunk
 - :issue:`SERVER-35653` Revert initial chunk creation optimization
 - :issue:`SERVER-35745` _getNextSessionMods doesn't include oplogReplay flag to query new oplog created during migration

source/includes/changelogs/releases/3.6.7.rst

@@ -23,7 +23,7 @@ Sharding
 - :issue:`SERVER-36041` Increase the size of changelog and actionlog
 - :issue:`SERVER-36132` Invariant that chunk migration is actually reflected in the metadata after successful commit
 - :issue:`SERVER-36232` Refresh after chunk migration commit may not see the committed metadata
-- :issue:`SERVER-36248` Do not reject sessions in FCV 3.4
+- :issue:`SERVER-36248` Do not reject sessions in fCV 3.4
 - :issue:`SERVER-36463` Bypass validation of a dummy signatures for isMaster on the unauthenticated connections
 
 Replication
@@ -101,7 +101,7 @@ Internals
 - :issue:`SERVER-26150` auth_utils.js authutils.assertAuthenticate should handle hangups better
 - :issue:`SERVER-32302` for-each loop over BSONObj is slower than explicit BSONObjIterator in MatchExpressionParser code
 - :issue:`SERVER-32371` features2.js should exclude clusterTime metadata
-- :issue:`SERVER-32639` Arbiters in standalone replica sets can't sign or validate clusterTime with auth on once FCV checks are removed
+- :issue:`SERVER-32639` Arbiters in standalone replica sets can't sign or validate clusterTime with auth on once fCV checks are removed
 - :issue:`SERVER-32792` Blacklist tests that assert on ismaster field of isMaster response in retryable_writes_jscore_stepdown_passthrough
 - :issue:`SERVER-33695` Include the loop name in the before and after recovery files in powertest.py
 - :issue:`SERVER-33841` Add hooks for the mutational fuzzer

source/includes/changelogs/releases/3.6.8.rst

@@ -13,7 +13,7 @@ Sharding
 - :issue:`SERVER-35092` ShardServerCatalogCacheLoader should have a timeout waiting for read concern
 - :issue:`SERVER-36332` CursorNotFound error in GetMore on a secondary with sessions
 - :issue:`SERVER-36741` ChunkManager::getShardIdsForRange invariants when max = MaxKey
-- :issue:`SERVER-36777` Excessive logging with sessions in FCV 3.4
+- :issue:`SERVER-36777` Excessive logging with sessions in fCV 3.4
 - :issue:`SERVER-37050` wait for replication in session_collection_auto_healing
 
 Replication

source/includes/changelogs/releases/3.6.9.rst

@@ -23,7 +23,7 @@ Sharding
 - :issue:`SERVER-37330` Add sharded passthrough suites to detect errors in LogicalSessionCache
 - :issue:`SERVER-37430` Destroy sharding task executors and AsyncRequestSenders after the PeriodicRunner is destroyed in mongod shutdown
 - :issue:`SERVER-37496` The balancer shouldn't register a shutdown task after the process is multithreaded
-- :issue:`SERVER-37631` Disable logical sessions if FCV is 3.4
+- :issue:`SERVER-37631` Disable logical sessions if fCV is 3.4
 - :issue:`SERVER-37657` Report the offending oplog entries if a batch contains non-increasing transaction numbers
 - :issue:`SERVER-37735` [3.6] Ensure the full logical session ID is included in commands sent by the ShardingTaskExecutor
 

source/includes/changelogs/releases/4.0.1.rst

@@ -23,7 +23,7 @@ Sharding
 - :issue:`SERVER-35938` NamespaceSerializer lock should be used for database as well as collection during createCollection
 - :issue:`SERVER-35997` Await replication on config server after shardCollection in safe secondary reads tests
 - :issue:`SERVER-36041` Increase the size of changelog and actionlog
-- :issue:`SERVER-36075` Add comment to shard_identity_rollback.js explaining why we set the FCV to 4.0 on the shardsvr
+- :issue:`SERVER-36075` Add comment to shard_identity_rollback.js explaining why we set the fCV to 4.0 on the shardsvr
 - :issue:`SERVER-36132` Invariant that chunk migration is actually reflected in the metadata after successful commit
 - :issue:`SERVER-36232` Refresh after chunk migration commit may not see the committed metadata
 
@@ -130,7 +130,7 @@ Internals
 - :issue:`SERVER-34793` Add call to BF suggestion server on failed task completion
 - :issue:`SERVER-34810` Session cache refresh can erroneously kill cursors that are still in use
 - :issue:`SERVER-34956` big_object1.js is not resilient to unexpected stepdowns
-- :issue:`SERVER-34984` Update major_version_upgrade.js test to call setFCV to the latest FCV
+- :issue:`SERVER-34984` Update major_version_upgrade.js test to call setFCV to the latest fCV
 - :issue:`SERVER-34996` Save console_output & console_screenshot from aws_ec2.py as artifacts in evergreen.yml
 - :issue:`SERVER-35101` Handle differently a badly formed bindIp argument
 - :issue:`SERVER-35165` Disable and re-enable update_test_lifecycle Evergreen task on the 4.0 branch

source/includes/changelogs/releases/4.0.13.rst

@@ -27,7 +27,7 @@ Replication
 - :issue:`SERVER-38685` Startup warning if In-Memory SE is used and writeConcernMajorityJournalDefault is true
 - :issue:`SERVER-39310` Check canServeReadsFor in getMores
 - :issue:`SERVER-40009` Set/honour initial sync flag at the early stages of initial sync
-- :issue:`SERVER-40954` Error message for UnrecoverableRollbackError in FCV 3.6 should recommend downgrading to 3.6
+- :issue:`SERVER-40954` Error message for UnrecoverableRollbackError in fCV 3.6 should recommend downgrading to 3.6
 - :issue:`SERVER-41218` rollback_after_enabling_majority_reads.js test should ensure the correct primary before restarting other nodes [v4.0]
 - :issue:`SERVER-41499` Track number of elections called for each reason in serverStatus
 - :issue:`SERVER-41500` Track number of successful elections for each reason in serverStatus

source/includes/changelogs/releases/4.0.19.rst

@@ -66,7 +66,7 @@ Internals
 - :issue:`SERVER-45367` When the Range Deleter is waiting for the open cursors, list these cursors in the logs.
 - :issue:`SERVER-45508` Invariant failure in getFieldsWithStringBounds with descending point ranges
 - :issue:`SERVER-46633` Windows TLS implementation may declare hostname mismatch on unrelated error
-- :issue:`SERVER-46758` setFCV can be interrupted before an FCV change is majority committed and rollback the FCV without running the setFCV server logic
+- :issue:`SERVER-46758` setFCV can be interrupted before an fCV change is majority committed and rollback the fCV without running the setFCV server logic
 - :issue:`SERVER-47063` Upgrade static OpenSSL to 1.1.1e
 - :issue:`SERVER-47071` CheckReplOplogs can fail to detect a mismatch
 - :issue:`SERVER-47187` Add startup warning when SeIncreaseWorkingSetPrivilege not present

source/includes/changelogs/releases/4.0.20.rst

@@ -68,7 +68,7 @@ Internals
 - :issue:`SERVER-37993` Upgrade asio to eed287d46c14310f0daf4ff19b0297917143723
 - :issue:`SERVER-41600` IndexCatalog::refreshEntry should invalidate the index from the CollectionInfoCache
 - :issue:`SERVER-42908` Add ErrorCodes to retryable errors to match drivers
-- :issue:`SERVER-46758` setFCV can be interrupted before an FCV change is majority committed and rollback the FCV without running the setFCV server logic
+- :issue:`SERVER-46758` setFCV can be interrupted before an fCV change is majority committed and rollback the fCV without running the setFCV server logic
 - :issue:`SERVER-47930` Ubuntu 20.04 - ldap_authz_authn.js fails to load test certificate
 - :issue:`SERVER-48032` Update references of community mailing-lists to MongoDB Developer Community Forums
 - :issue:`SERVER-48107` Retry replSetStepDown in rollback_test.js 

source/includes/changelogs/releases/4.0.23.rst

@@ -7,7 +7,7 @@ Sharding
 ~~~~~~~~
 
 - :issue:`SERVER-50305` ARS::next() does not respect OperationContext deadline
-- :issue:`SERVER-53274` The force-write of the ``history`` field to all chunks on FCV upgrade from 3.6 to 4.0 is unnecessary
+- :issue:`SERVER-53274` The force-write of the ``history`` field to all chunks on fCV upgrade from 3.6 to 4.0 is unnecessary
 
 Replication
 ~~~~~~~~~~~

source/includes/changelogs/releases/4.0.25.rst

@@ -9,7 +9,7 @@ Sharding
 - :issue:`SERVER-40293` change_stream.js removal test should do an unordered check on the change stream
 - :issue:`SERVER-47699` Change yield type used by range deleter from YIELD_MANUAL to YIELD_AUTO
 - :issue:`SERVER-56515` Chunk merge doesn't consider the ``incrementChunkMajorVersionOnChunkSplits`` parameter
-- :issue:`SERVER-57009` Additional debugging information in case of crash during FCV change
+- :issue:`SERVER-57009` Additional debugging information in case of crash during fCV change
 - :issue:`SERVER-57055` delete_during_migrate.js is consistently failing in test suites with Code Coverage enabled
 - :issue:`SERVER-57102` Fixing invariants on ShardServerCatalogCacheLoader to consider different terms
 
@@ -51,13 +51,13 @@ Internals
 - :issue:`SERVER-56376` [RRFaM] Add jstest that exercises both retryable FaM behaviors
 - :issue:`SERVER-56489` New pass-through test with random hello server-side delays
 - :issue:`SERVER-56563` [RRFaM] Forge noop image oplog entries for chunk migration
-- :issue:`SERVER-56668` Create config.image_collection when setting FCV to 4.0 on primary
+- :issue:`SERVER-56668` Create config.image_collection when setting fCV to 4.0 on primary
 - :issue:`SERVER-56713` [RRFaM] Avoid creating images while in initial sync
 - :issue:`SERVER-56795` Changes from SERVER-53274 were unintentionally reverted
 - :issue:`SERVER-56819` $indexOfCP returns incorrect result when searching for empty string inside empty string with non-zero start index (classic execution engine only)
 - :issue:`SERVER-56854` Provide the ability for RSM requests to timeout and mark the server as failed
 - :issue:`SERVER-57015` [RRFaM] Writing to the image collection must be in an UnreplicatedWriteBlock
-- :issue:`SERVER-57044` [v4.0] Add jstest that changing the FCV will disable new retryable findAndModify format even if storeFindAndModifyImagesInSideCollection=true
+- :issue:`SERVER-57044` [v4.0] Add jstest that changing the fCV will disable new retryable findAndModify format even if storeFindAndModifyImagesInSideCollection=true
 - :issue:`SERVER-57172` Do json.send before DSI post_run
 - :issue:`SERVER-57173` Write invalidated image for retryable findAndModify when secondaries apply operations earlier than minValid
 - :issue:`SERVER-57356` Better logging around failed chunk migration