[[release-notes-7.5.0]]
== {es} version 7.5.0

Also see <<breaking-changes-7.5,Breaking changes in 7.5>>.
[[known-issues-7.5.0]]
[float]
=== Known issues

* Stop all {transforms} during a rolling upgrade to 7.5.
If a {transform} is running during upgrade, the {transform} audit index might disappear.
(issue: {issue}/49730[#49730])

[[breaking-7.5.0]]
[float]
=== Breaking changes

Search::
* Add support for aliases in queries on _index. {pull}46640[#46640] (issues: {issue}23306[#23306], {issue}34089[#34089])



[[deprecation-7.5.0]]
[float]
=== Deprecations

Aggregations::
* Deprecate the  "index.max_adjacency_matrix_filters" setting {pull}46394[#46394] (issue: {issue}46324[#46324])

Allocation::
* Deprecate include_relocations setting {pull}47443[#47443] (issue: {issue}46079[#46079])

Mapping::
* Deprecate `_field_names` disabling {pull}42854[#42854] (issue: {issue}27239[#27239])

Search::
* Reject regexp queries on the _index field. {pull}46945[#46945] (issues: {issue}34089[#34089], {issue}46640[#46640])



[[feature-7.5.0]]
[float]
=== New features

Features/ILM+SLM::
* Add API to execute SLM retention on-demand {pull}47405[#47405] (issues: {issue}43663[#43663], {issue}46508[#46508])
* Add retention to Snapshot Lifecycle Management {pull}46407[#46407] (issues: {issue}38461[#38461], {issue}43663[#43663], {issue}45362[#45362])

Features/Ingest::
* Add enrich processor {pull}48039[#48039] (issue: {issue}32789[#32789])

Machine Learning::
* Implement evaluation API for multiclass classification problem {pull}47126[#47126] (issue: {issue}46735[#46735])
* Implement new analysis type: classification {pull}46537[#46537] (issue: {issue}46735[#46735])
* Add audit messages for Data Frame Analytics {pull}46521[#46521] (issue: {issue}184[#184])
* Implement DataFrameAnalyticsAuditMessage and DataFrameAnalyticsAuditor {pull}45967[#45967]

SQL::
* SQL: Implement DATEDIFF function {pull}47920[#47920] (issue: {issue}47919[#47919])
* SQL: Implement DATEADD function {pull}47747[#47747] (issue: {issue}47746[#47746])
* SQL: Implement DATE_PART function {pull}47206[#47206] (issue: {issue}46372[#46372])
* SQL: Add alias DATETRUNC to DATE_TRUNC function {pull}47173[#47173] (issue: {issue}46473[#46473])
* SQL: Add PIVOT support {pull}46489[#46489]
* SQL: Implement DATE_TRUNC function {pull}46473[#46473] (issue: {issue}46319[#46319])



[[enhancement-7.5.0]]
[float]
=== Enhancements

Aggregations::
* Adjacency_matrix aggregation memory usage optimisation. {pull}46257[#46257] (issue: {issue}46212[#46212])
* Support geotile_grid aggregation in composite agg sources {pull}45810[#45810] (issue: {issue}40568[#40568])

Allocation::
* Do not cancel ongoing recovery for noop copy on broken node {pull}48265[#48265] (issue: {issue}47974[#47974])
* Shrink should not touch max_retries {pull}47719[#47719]
* Re-fetch shard info of primary when new node joins {pull}47035[#47035] (issues: {issue}42518[#42518], {issue}46959[#46959])
* Sequence number based replica allocation {pull}46959[#46959] (issue: {issue}46318[#46318])

Authorization::
* Add support to retrieve all API keys if user has privilege {pull}47274[#47274] (issue: {issue}46887[#46887])
* Add 'create_doc' index privilege {pull}45806[#45806]
* Reducing privileges needed by built-in beats_admin role {pull}41586[#41586]

CCR::
* Add Pause/Resume Auto-Follower APIs to High Level REST Client {pull}47989[#47989] (issue: {issue}47510[#47510])
* Add Pause/Resume Auto Follower APIs {pull}47510[#47510] (issue: {issue}46665[#46665])

CRUD::
* Allow optype CREATE for append-only indexing operations {pull}47169[#47169]

Cluster Coordination::
* Warn on slow metadata persistence {pull}47005[#47005]
* Improve LeaderCheck rejection messages {pull}46998[#46998]

Engine::
* Do not warm up searcher in engine constructor {pull}48605[#48605] (issue: {issue}47186[#47186])
* Refresh should not acquire readLock {pull}48414[#48414] (issue: {issue}47186[#47186])
* Avoid unneeded refresh with concurrent realtime gets {pull}47895[#47895]
* sync before trimUnreferencedReaders to improve index preformance {pull}47790[#47790] (issues: {issue}46201[#46201], {issue}46203[#46203])
* Limit number of retaining translog files for peer recovery {pull}47414[#47414]
* Remove isRecovering method from Engine {pull}47039[#47039]

Features/ILM+SLM::
* Separate SLM stop/start/status API from ILM {pull}47710[#47710] (issue: {issue}43663[#43663])
* Set default SLM retention invocation time {pull}47604[#47604] (issue: {issue}43663[#43663])
* ILM: Skip rolling indexes that are already rolled {pull}47324[#47324] (issue: {issue}44175[#44175])
*  Add support for POST requests to SLM Execute API  {pull}47061[#47061]
* Wait for snapshot completion in SLM snapshot invocation {pull}47051[#47051] (issues: {issue}38461[#38461], {issue}43663[#43663])
* Add node setting for disabling SLM {pull}46794[#46794] (issue: {issue}38461[#38461])
* ILM: parse origination date from index name {pull}46755[#46755] (issues: {issue}42449[#42449], {issue}46561[#46561])
* [ILM] Add date setting to calculate index age {pull}46561[#46561] (issue: {issue}42449[#42449])

Features/Ingest::
* Add the ability to require an ingest pipeline {pull}46847[#46847]

Features/Java High Level REST Client::
* add function submitDeleteByQueryTask in class RestHighLevelClient {pull}46833[#46833]
* return Cancellable in RestHighLevelClient {pull}45688[#45688] (issue: {issue}44802[#44802])

Features/Java Low Level REST Client::
* Add cloudId builder to the HLRC {pull}47868[#47868]
* Add support for cancelling async requests in low-level REST client {pull}45379[#45379] (issues: {issue}43332[#43332], {issue}44802[#44802])

Features/Monitoring::
* Remove hard coded version_created in default monitoring alerts {pull}47744[#47744]

Infra/Circuit Breakers::
* Emit log message when parent circuit breaker trips {pull}47000[#47000]
* Fix G1 GC default IHOP {pull}46169[#46169]

Infra/Core::
* Introduce system JVM options {pull}48252[#48252] (issue: {issue}48222[#48222])
* Set start of the week to Monday for root locale {pull}43652[#43652] (issues: {issue}41670[#41670], {issue}42588[#42588], {issue}43275[#43275])

Infra/Packaging::
* Package the JDK into jdk.app on macOS {pull}48765[#48765]
* Move ES_TMPDIR substitution into jvm options parser {pull}47189[#47189] (issue: {issue}47133[#47133])
* Clarify missing java error message {pull}46160[#46160] (issue: {issue}44139[#44139])

Infra/Scripting::
* Add explanations to script score queries {pull}46693[#46693]

Infra/Settings::
* Do not reference values for filtered settings {pull}48066[#48066]
* Allow setting validation against arbitrary types {pull}47264[#47264] (issue: {issue}25560[#25560])
* Clarify error message on keystore write permissions {pull}46321[#46321]
* Add more meaningful keystore version mismatch errors {pull}46291[#46291] (issue: {issue}44624[#44624])

MULTIPLE AREA LABELS::
* SQL: Add support for shape type {pull}46464[#46464] (issues: {issue}43644[#43644], {issue}46412[#46412])

Machine Learning::
* Throw an exception when memory usage estimation endpoint encounters empty data frame. {pull}49143[#49143] (issue: {issue}49140[#49140])
* Change format of MulticlassConfusionMatrix result to be more self-explanatory {pull}48174[#48174] (issue: {issue}46735[#46735])
* Make num_top_classes parameter's default value equal to 2 {pull}48119[#48119] (issue: {issue}46735[#46735])
* [ML] Add option to stop datafeed that finds no data {pull}47922[#47922]
* Allow integer types for classification's dependent variable {pull}47902[#47902] (issue: {issue}46735[#46735])
* [ML] Add lazy assignment job config option {pull}47726[#47726]
* [ML] Additional outlier detection parameters {pull}47600[#47600]
* [ML] More accurate job memory overhead {pull}47516[#47516]
* [ML] Throttle the delete-by-query of expired results {pull}47177[#47177] (issues: {issue}47003[#47003], {issue}47103[#47103])

Mapping::
* Add migration tool checks for _field_names disabling {pull}46972[#46972] (issues: {issue}42854[#42854], {issue}46681[#46681])

Network::
* Introduce simple remote connection strategy {pull}47480[#47480]
* Enhanced logging when transport is misconfigured to talk to HTTP port {pull}45964[#45964] (issue: {issue}32688[#32688])

Ranking::
* Add vector functions to the Sort Script Context {pull}45244[#45244] (issue: {issue}45243[#45243])

Recovery::
* Do not send recovery requests with CancellableThreads {pull}46287[#46287] (issue: {issue}46178[#46178])

SQL::
* SQL: Add 3rd optional arg to DATE_PART {pull}47614[#47614] (issue: {issue}47206[#47206])
* SQL: make date/datetime and interval types compatible in conditional functions {pull}47595[#47595] (issue: {issue}46674[#46674])
* SQL: use calendar interval of 1y instead of fixed interval for grouping by YEAR and HISTOGRAMs {pull}47558[#47558] (issue: {issue}40162[#40162])
* SQL: Support queries with HAVING over SELECT {pull}46709[#46709] (issue: {issue}37051[#37051])

Search::
* Remove response search phase from ExpandSearchPhase {pull}48401[#48401]
* Add builder for distance_feature to QueryBuilders {pull}47846[#47846] (issue: {issue}47767[#47767])
* Fold InitialSearchPhase into AbstractSearchAsyncAction {pull}47182[#47182]
* max_children exist only in top level nested sort {pull}46731[#46731]
* First round of optimizations for vector functions. {pull}46294[#46294] (issues: {issue}45390[#45390], {issue}45936[#45936], {issue}46103[#46103], {issue}46155[#46155], {issue}46190[#46190], {issue}46202[#46202])
* Throw exception in scroll requests using `from` {pull}46087[#46087] (issues: {issue}26235[#26235], {issue}44493[#44493], {issue}9373[#9373])

Snapshot/Restore::
* Track Repository Gen. in BlobStoreRepository {pull}48944[#48944] (issues: {issue}38941[#38941], {issue}47520[#47520], {issue}47834[#47834], {issue}49048[#49048])
* Resume partial download from S3 on connection drop {pull}46589[#46589]
* More Efficient Ordering of Shard Upload Execution {pull}42791[#42791]

Transform::
* [ML][Transforms] allow executor to call start on started task {pull}46347[#46347]
* [ML-DataFrame] improve error message for timeout case in stop {pull}46131[#46131] (issue: {issue}45610[#45610])
* [ML][Data Frame] add support for `wait_for_checkpoint` flag on `_stop` API {pull}45469[#45469] (issue: {issue}45293[#45293])



[[bug-7.5.0]]
[float]
=== Bug fixes

Aggregations::
* Fix ignoring missing values in min/max aggregations {pull}48970[#48970] (issue: {issue}48905[#48905])
* DocValueFormat implementation for date range fields {pull}47472[#47472] (issues: {issue}47323[#47323], {issue}47469[#47469])

Allocation::
* Auto-expand replicated closed indices {pull}48973[#48973]
* Handle negative free disk space in deciders {pull}48392[#48392] (issue: {issue}48380[#48380])
* Dangling indices strip aliases {pull}47581[#47581]
* Cancel recoveries even if all shards assigned {pull}46520[#46520]
* Fail allocation of new primaries in empty cluster {pull}43284[#43284] (issue: {issue}41073[#41073])

Analysis::
* Reset Token position on reuse in `predicate_token_filter` {pull}47424[#47424] (issue: {issue}47197[#47197])

Audit::
* Audit log filter and marker {pull}45456[#45456] (issue: {issue}47251[#47251])

Authentication::
* Add owner flag parameter to the rest spec {pull}48500[#48500] (issue: {issue}48499[#48499])
* Add populate_user_metadata in OIDC realm {pull}48357[#48357] (issue: {issue}48217[#48217])
* Remove unnecessary details logged for OIDC {pull}48271[#48271]
* Fix AD realm additional metadata {pull}47179[#47179] (issue: {issue}45848[#45848])
* Fallback to realm authc if ApiKey fails {pull}46538[#46538]
* PKI realm accept only verified certificates {pull}45590[#45590]

Authorization::
* Fix security origin for TokenService#findActiveTokensFor... {pull}47418[#47418] (issue: {issue}47151[#47151])
* Use 'should' clause instead of 'filter' when querying native privileges {pull}47019[#47019]
* Do not rewrite aliases on remove-index from aliases requests {pull}46989[#46989]
* Validate index and cluster privilege names when creating a role {pull}46361[#46361] (issue: {issue}29703[#29703])
* Validate `query` field when creating roles {pull}46275[#46275] (issue: {issue}34252[#34252])

CCR::
* CCR should auto-retry rejected execution exceptions {pull}49213[#49213]
* Do not auto-follow closed indices {pull}47721[#47721] (issue: {issue}47582[#47582])
* Relax maxSeqNoOfUpdates assertion in FollowingEngine {pull}47188[#47188] (issue: {issue}47137[#47137])
* Handle lower retaining seqno retention lease error {pull}46420[#46420] (issues: {issue}46013[#46013], {issue}46416[#46416])

CRUD::
* Close query cache on index service creation failure {pull}48230[#48230] (issue: {issue}48186[#48186])
* Use optype CREATE for single auto-id index requests {pull}47353[#47353]
* Ignore replication for noop updates {pull}46458[#46458] (issues: {issue}41065[#41065], {issue}44603[#44603], {issue}46366[#46366])

Client::
* Correct default refresh policy for security APIs {pull}46896[#46896]

Cluster Coordination::
* Ignore metadata of deleted indices at start {pull}48918[#48918]
* Omit writing index metadata for non-replicated closed indices on data-only node {pull}47285[#47285] (issue: {issue}47276[#47276])
* Assert no exceptions during state application {pull}47090[#47090] (issue: {issue}47038[#47038])
* Remove trailing comma from nodes lists {pull}46484[#46484]

Distributed::
* Closed shard should never open new engine {pull}47186[#47186] (issues: {issue}45263[#45263], {issue}47060[#47060])
* Fix false positive out of sync warning in synced-flush {pull}46576[#46576] (issues: {issue}28464[#28464], {issue}30244[#30244])
* Suppress warning logs from background sync on relocated primary {pull}46247[#46247] (issues: {issue}40800[#40800], {issue}42241[#42241])

Engine::
* Greedily advance safe commit on new global checkpoint {pull}48559[#48559] (issue: {issue}48532[#48532])

Features/ILM+SLM::
* Don't halt policy execution on policy trigger exception {pull}49128[#49128]
* Don't schedule SLM jobs when services have been stopped {pull}48658[#48658] (issue: {issue}47749[#47749])
* Ensure SLM stats does not block an in-place upgrade from 7.4 {pull}48367[#48367]
* Ensure SLM stats does not block an in-place upgrade from 7.4 {pull}48361[#48361]
* Add SLM support to xpack usage and info APIs {pull}48096[#48096] (issue: {issue}43663[#43663])
* Change policy_id to list type in slm.get_lifecycle {pull}47766[#47766] (issue: {issue}47765[#47765])
* Throw error retrieving non-existent SLM policy {pull}47679[#47679] (issue: {issue}47664[#47664])
* Handle partial failure retrieving segments in SegmentCountStep {pull}46556[#46556]
* Fixes for API specification {pull}46522[#46522]

Features/Indices APIs::
* Fix Rollover error when alias has closed indices {pull}47148[#47148] (issue: {issue}47146[#47146])

Features/Ingest::
* Do not wrap ingest processor exception with IAE {pull}48816[#48816] (issue: {issue}48810[#48810])
* Introduce dedicated ingest processor exception {pull}48810[#48810] (issue: {issue}48803[#48803])
* Allow dropping documents with auto-generated ID {pull}46773[#46773] (issue: {issue}46678[#46678])
* Expose cache setting in UserAgentPlugin {pull}46533[#46533]

Features/Java High Level REST Client::
* fix incorrect comparison {pull}48208[#48208]
* Fix ILM HLRC Javadoc->Documentation links {pull}48083[#48083]
* Change HLRC count request to accept a QueryBuilder {pull}46904[#46904] (issue: {issue}46829[#46829])
* [HLRC] Send min_score as query string parameter to the count API {pull}46829[#46829] (issue: {issue}46474[#46474])
* HLRC multisearchTemplate forgot params {pull}46492[#46492] (issue: {issue}46488[#46488])
* Added fields for MultiTermVectors (#42232) {pull}42877[#42877] (issue: {issue}42232[#42232])

Features/Java Low Level REST Client::
* Update http-core and http-client dependencies {pull}46549[#46549] (issues: {issue}45379[#45379], {issue}45577[#45577], {issue}45808[#45808])

Features/Monitoring::
* [Monitoring] Add new cluster privilege now necessary for the stack monitoring ui {pull}47871[#47871]
* Validating monitoring hosts setting while parsing {pull}47246[#47246] (issue: {issue}47125[#47125])

Features/Watcher::
* Fix class used to initialize logger in Watcher {pull}46467[#46467]
* Fix wrong URL encoding in watcher HTTP client {pull}45894[#45894] (issue: {issue}44970[#44970])

Geo::
* Geo: implement proper handling of out of bounds geo points {pull}47734[#47734] (issue: {issue}43916[#43916])
* Geo: Fixes indexing of linestrings that go around the globe {pull}47471[#47471] (issues: {issue}43826[#43826], {issue}43837[#43837])
* Provide better error when updating geo_shape field mapper settings {pull}47281[#47281] (issue: {issue}47006[#47006])
* Geo: fix indexing of west to east linestrings crossing the antimeridian {pull}46601[#46601] (issue: {issue}43775[#43775])
* Reset queryGeometry in ShapeQueryTests {pull}45974[#45974] (issue: {issue}45628[#45628])

Highlighting::
* Fix highlighting of overlapping terms in the unified highlighter {pull}47227[#47227]
* Fix highlighting for script_score query {pull}46507[#46507] (issue: {issue}46471[#46471])

Infra/Core::
* Don't drop user's MaxDirectMemorySize flag on jdk8/windows {pull}48657[#48657] (issues: {issue}44174[#44174], {issue}48365[#48365])
* Warn when MaxDirectMemorySize may be incorrect (Windows/JDK8 only issue) {pull}48365[#48365] (issue: {issue}47384[#47384])
* Support optional parsers in any order with DateMathParser and roundup {pull}46654[#46654] (issue: {issue}45284[#45284])

Infra/Logging::
* SearchSlowLog uses a non thread-safe object to escape json {pull}48363[#48363] (issues: {issue}44642[#44642], {issue}48358[#48358])

Infra/Scripting::
* Drop stored scripts with the old style-id {pull}48078[#48078] (issue: {issue}47593[#47593])

MULTIPLE AREA LABELS::
* Prevent deadlock by using separate schedulers {pull}48697[#48697] (issues: {issue}41451[#41451], {issue}47599[#47599])
* Don't apply the plugin's reader wrapper in can_match phase {pull}47816[#47816] (issue: {issue}46817[#46817])
* Fix cluster alert for watcher/monitoring IndexOutOfBoundsExcep… {pull}45308[#45308] (issue: {issue}43184[#43184])

Machine Learning::
* [ML] Fixes for stop datafeed edge cases {pull}49191[#49191] (issues: {issue}43670[#43670], {issue}48931[#48931])
* [ML] Avoid NPE when node load is calculated on job assignment {pull}49186[#49186] (issue: {issue}49150[#49150])
* Do not throw exceptions resulting from persisting datafeed timing stats. {pull}49044[#49044] (issue: {issue}49032[#49032])
* [ML] Deduplicate multi-fields for data frame analytics {pull}48799[#48799] (issues: {issue}48756[#48756], {issue}48770[#48770])
* [ML] Prevent fetching multi-field from source {pull}48770[#48770] (issue: {issue}48756[#48756])
* [ML] Fix detection of syslog-like timestamp in find_file_structure {pull}47970[#47970]
* Fix serialization of evaluation response. {pull}47557[#47557]
* [ML] Reinstate ML daily maintenance actions {pull}47103[#47103] (issue: {issue}47003[#47003])
* [ML] fix two datafeed flush lockup bugs {pull}46982[#46982]

Network::
* Fix es.http.cname_in_publish_address Deprecation Logging {pull}47451[#47451] (issue: {issue}47436[#47436])

Recovery::
* Ignore Lucene index in peer recovery if translog corrupted {pull}49114[#49114]

Reindex::
* Fix issues with serializing BulkByScrollResponse {pull}45357[#45357]

SQL::
* SQL: Fix issue with mins & hours for DATEDIFF {pull}49252[#49252]
* SQL: Fix issue with negative literels and parentheses {pull}48113[#48113] (issue: {issue}48009[#48009])
* SQL: add "format" for "full" date range queries {pull}48073[#48073] (issue: {issue}48033[#48033])
* SQL: Fix arg verification for DateAddProcessor {pull}48041[#48041]
* SQL: Fix Nullability of DATEADD {pull}47921[#47921]
* SQL: Allow whitespaces in escape patterns {pull}47577[#47577] (issue: {issue}47401[#47401])
* SQL: fix multi full-text functions usage with aggregate functions {pull}47444[#47444] (issue: {issue}47365[#47365])
* SQL: Check case where the pivot limit is reached {pull}47121[#47121] (issue: {issue}47002[#47002])
* SQL: Properly handle indices with no/empty mapping {pull}46775[#46775] (issue: {issue}46757[#46757])
* SQL: improve ResultSet behavior when no rows are available {pull}46753[#46753] (issue: {issue}46750[#46750])
* SQL: use the correct data type for types conversion {pull}46574[#46574] (issue: {issue}46090[#46090])
* SQL: Fix issue with common type resolution {pull}46565[#46565] (issue: {issue}46551[#46551])
* SQL: fix scripting for grouped by datetime functions {pull}46421[#46421] (issue: {issue}40241[#40241])
* SQL: Use null schema response {pull}46386[#46386] (issue: {issue}46381[#46381])
* SQL: Fix issue with IIF function when condition folds {pull}46290[#46290] (issue: {issue}46268[#46268])
* SQL: Fix issue with DataType for CASE with NULL {pull}46173[#46173] (issue: {issue}46032[#46032])
* SQL: Failing Group By queries due to different ExpressionIds {pull}43072[#43072] (issues: {issue}33361[#33361], {issue}34543[#34543], {issue}36074[#36074], {issue}37044[#37044], {issue}40001[#40001], {issue}40240[#40240], {issue}41159[#41159], {issue}42041[#42041], {issue}46316[#46316])
* SQL: wrong number of values for columns {pull}42122[#42122]

Search::
* Lucene#asSequentialBits gets the leadCost backwards. {pull}48335[#48335]
* Ensure that we don't call listener twice when detecting a partial failures in _search {pull}47694[#47694]
* Fix alias field resolution in match query {pull}47369[#47369]
* Multi-get requests should wait for search active {pull}46283[#46283] (issue: {issue}27500[#27500])
* Resolve the incorrect scroll_current when delete or close index {pull}45226[#45226]

Security::
* Remove uniqueness constraint for API key name and make it optional {pull}47549[#47549] (issue: {issue}46646[#46646])
* Initialize document subset bit set cache used for DLS {pull}46211[#46211] (issue: {issue}45147[#45147])

Snapshot/Restore::
* Fix RepoCleanup not Removed on Master-Failover {pull}49217[#49217]
* Make FsBlobContainer Listing Resilient to Concurrent Modifications {pull}49142[#49142] (issue: {issue}37581[#37581])
* Fix SnapshotShardStatus Reporting for Failed Shard {pull}48556[#48556] (issue: {issue}48526[#48526])
* Cleanup Concurrent RepositoryData Loading {pull}48329[#48329] (issue: {issue}48122[#48122])
* Fix Bug in Azure Repo Exception Handling {pull}47968[#47968]
* Make loadShardSnapshot Exceptions Consistent {pull}47728[#47728] (issue: {issue}47507[#47507])
* Fix Snapshot Corruption in Edge Case {pull}47552[#47552] (issues: {issue}46250[#46250], {issue}47550[#47550])
* Fix Bug in Snapshot Status Response Timestamps {pull}46919[#46919] (issue: {issue}46913[#46913])
* Normalize Blob Store Repo Paths {pull}46869[#46869] (issue: {issue}41814[#41814])
* GCS deleteBlobsIgnoringIfNotExists should catch StorageException {pull}46832[#46832] (issue: {issue}46772[#46772])
* Execute SnapshotsService Error Callback on Generic Thread {pull}46277[#46277]
* Make Snapshot Logic Write Metadata after Segments {pull}45689[#45689] (issue: {issue}41581[#41581])

Store::
* Allow truncation of clean translog {pull}47866[#47866]

Task Management::
* Fix .tasks index strict mapping: parent_id should be parent_task_id {pull}48393[#48393]

Transform::
* [Transform] do not fail checkpoint creation due to global checkpoint mismatch {pull}48423[#48423] (issue: {issue}48379[#48379])
* [7.5][Transform] prevent assignment if any node is older than 7.4 {pull}48055[#48055] (issue: {issue}48019[#48019])
* [Transform] prevent assignment to nodes older than 7.4 {pull}48044[#48044] (issue: {issue}48019[#48019])
* [ML][Transforms] fix bwc serialization with 7.3 {pull}48021[#48021]
* [ML][Transforms] signal listener early on task _stop failure {pull}47954[#47954]
* [ML][Transform] Use field_caps API for mapping deduction {pull}46703[#46703] (issue: {issue}46694[#46694])
* [ML-DataFrame] Fix off-by-one error in checkpoint operations_behind {pull}46235[#46235]



[[regression-7.5.0]]
[float]
=== Regressions

Aggregations::
* Implement rounding optimization for fixed offset timezones {pull}46670[#46670] (issue: {issue}45702[#45702])

Infra/Core::
* [Java.time] Support partial parsing {pull}46814[#46814] (issues: {issue}45284[#45284], {issue}47473[#47473])
* Enable ResolverStyle.STRICT for java formatters {pull}46675[#46675]



[[upgrade-7.5.0]]
[float]
=== Upgrades

Infra/Scripting::
* Update mustache dependency to 0.9.6 {pull}46243[#46243]

Snapshot/Restore::
* Update AWS SDK for repository-s3 plugin to support IAM Roles for Service Accounts {pull}46969[#46969]
* Upgrade to Azure SDK 8.4.0 {pull}46094[#46094]

Store::
* Upgrade to Lucene 8.3. {pull}48829[#48829]
