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OpenSearch/docs/reference/release-notes/7.4.asciidoc
Przemyslaw Gomulka 412e163cf6
[Doc] migration guide joda (#51986) 
The joda to java.time migration requires users to upgrade their mappings. We allow them to still use 6.x created indices with joda patterns in 7 but ask them to upgrade their patterns in 7.x.
This migration guide is to help them understand how they could be affected and what needs to be changed in their mappings.
closes #51614
closes #51236
2020-03-23 08:29:01 +01:00

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[[release-notes-7.4.2]]
== {es} version 7.4.2
[float]
[[bug-7.4.2]]
=== Bug fixes
Transform::
* Prevent assignment if any node is older than 7.4 {pull}48055[#48055] (issue: {issue}48019[#48019])
[[release-notes-7.4.1]]
== {es} version 7.4.1
Also see <<breaking-changes-7.4,Breaking changes in 7.4>>.
[[enhancement-7.4.1]]
[float]
=== Enhancements
Engine::
* 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]
Infra/Circuit Breakers::
* Emit log message when parent circuit breaker trips {pull}47000[#47000]
Machine Learning::
* Throttle the delete-by-query of expired results {pull}47177[#47177] (issues: {issue}47003[#47003])
* The {ml} native processes are now arranged in a `.app` directory structure on
macOS, to allow for notarization on macOS Catalina. {ml-pull}593[#593]
[[bug-7.4.1]]
[float]
=== Bug fixes
Aggregations::
* DocValueFormat implementation for date range fields {pull}47472[#47472] (issues: {issue}47323[#47323], {issue}47469[#47469])
Allocation::
* Dangling indices strip aliases {pull}47581[#47581]
Analysis::
* Reset Token position on reuse in `predicate_token_filter` {pull}47424[#47424] (issue: {issue}47197[#47197])
Authentication::
* Fix AD realm additional metadata {pull}47179[#47179] (issue: {issue}45848[#45848])
Authorization::
* Use 'should' clause instead of 'filter' when querying native privileges {pull}47019[#47019]
CCR::
* 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])
Cluster Coordination::
* Omit writing index metadata for non-replicated closed indices on data-only node {pull}47285[#47285] (issue: {issue}47276[#47276])
Features/ILM+SLM::
* Throw error retrieving non-existent SLM policy {pull}47679[#47679] (issue: {issue}47664[#47664])
Features/Indices APIs::
* Fix Rollover error when alias has closed indices {pull}47148[#47148] (issue: {issue}47146[#47146])
Features/Java High Level REST Client::
* Fix ILM HLRC Javadoc->Documentation links {pull}48083[#48083]
Features/Monitoring::
* [Monitoring] Add new cluster privilege now necessary for the stack monitoring ui {pull}47871[#47871]
Infra/Scripting::
* Drop stored scripts with the old style-id {pull}48078[#48078] (issue: {issue}47593[#47593])
Machine Learning::
* Fix detection of syslog-like timestamp in find_file_structure {pull}47970[#47970]
* Reinstate ML daily maintenance actions {pull}47103[#47103] (issue: {issue}47003[#47003])
* Fix possibility of crash when calculating forecasts that overflow to disk {ml-pull}688[#688]
Network::
* Fix es.http.cname_in_publish_address Deprecation Logging {pull}47451[#47451] (issue: {issue}47436[#47436])
SQL::
* 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: 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: wrong number of values for columns {pull}42122[#42122]
Search::
* Fix alias field resolution in match query {pull}47369[#47369]
Snapshot/Restore::
* Fix Bug in Azure Repo Exception Handling {pull}47968[#47968]
* Fix Snapshot Corruption in Edge Case {pull}47552[#47552] (issues: {issue}46250[#46250], {issue}47550[#47550])
Store::
* Allow truncation of clean translog {pull}47866[#47866]
Transform::
* Fix bwc serialization with 7.3 {pull}48021[#48021]
[[release-notes-7.4.0]]
== {es} version 7.4.0
Also see <<breaking-changes-7.4,Breaking changes in 7.4>>.
[float]
=== Known issues
* Activating the <<search-slow-log, search slow log>> should be avoided in this version.
Any attempt to log a slow search can throw an AIOOBE due to a bug that
performs concurrent modifications on a shared byte array.
(issue: {issue}/48358[#48358])
* Indices created in 6.x with <<date,`date`>> and <<date_nanos,`date_nanos`>> fields using formats
that are incompatible with java.time patterns will cause parsing errors, incorrect date calculations or wrong search results.
https://github.com/elastic/elasticsearch/pull/52555
This is fixed in {es} 7.7 and later versions.
[[breaking-7.4.0]]
[float]
=== Breaking changes
Infra/REST API::
* Update the schema for the REST API specification {pull}42346[#42346] (issue: {issue}35262[#35262])
Machine Learning::
* Improve progress reporting for data frame analytics {pull}45856[#45856]
Ranking::
* Forbid empty doc values on vector functions {pull}43944[#43944]
Search::
* Use float instead of double for query vectors. {pull}46004[#46004]
Snapshot/Restore::
* Provide an Option to Use Path-Style-Access with S3 Repo {pull}41966[#41966] (issue: {issue}41816[#41816])
Transforms::
* Combine task_state and indexer_state in _stats {pull}45276[#45276] (issue: {issue}45201[#45201])
* Improve response format of transform stats endpoint {pull}44350[#44350] (issue: {issue}43767[#43767])
[[breaking-java-7.4.0]]
[float]
=== Breaking Java changes
Geo::
* Geo: Change order of parameter in Geometries to lon, lat {pull}45332[#45332] (issue: {issue}45048[#45048])
Network::
* Stop Recreating Wrapped Handlers in RestController {pull}44964[#44964]
[[deprecation-7.4.0]]
[float]
=== Deprecations
Geo::
* Geo: add Geometry-based query builders to QueryBuilders {pull}45058[#45058] (issues: {issue}44715[#44715], {issue}45048[#45048])
Infra/Core::
* Bundle AdoptOpenJDK 13 {pull}46860[#46860]
* Add deprecation check for pidfile setting {pull}45939[#45939] (issues: {issue}45938[#45938], {issue}45940[#45940])
* Deprecate the pidfile setting {pull}45938[#45938]
* Add node.processors setting in favor of processors {pull}45855[#45855]
* Deprecate setting processors to more than available {pull}44889[#44889]
Infra/Settings::
* Add deprecation check for processors {pull}45925[#45925] (issues: {issue}45855[#45855], {issue}45905[#45905])
Machine Learning::
* Only emit deprecation warning if there was actual change of a datafeed's job_id. {pull}44755[#44755]
* Deprecate the ability to update datafeed's job_id. {pull}44691[#44691] (issue: {issue}44615[#44615])
[[feature-7.4.0]]
[float]
=== New features
Aggregations::
* Support Range Fields in Histogram and Date Histogram {pull}45395[#45395]
* Add Cumulative Cardinality agg (and Data Science plugin) {pull}43661[#43661] (issue: {issue}43550[#43550])
Analysis::
* Add support for inlined user dictionary in the Kuromoji plugin {pull}45489[#45489] (issue: {issue}25343[#25343])
Authentication::
* PKI realm authentication delegation {pull}45906[#45906] (issue: {issue}34396[#34396])
* PKI Authentication Delegation in new endpoint {pull}43796[#43796] (issue: {issue}34396[#34396])
Authorization::
* Add granular privileges for API keys {pull}42020[#42020]
Features/ILM::
* Add Snapshot Lifecycle Management {pull}43934[#43934] (issue: {issue}38461[#38461])
Features/Watcher::
* Add max_iterations configuration to watcher action with foreach execution {pull}45715[#45715] (issues: {issue}41997[#41997], {issue}45169[#45169])
Geo::
* [SPATIAL] New ShapeQueryBuilder for querying indexed cartesian geometry {pull}45108[#45108] (issue: {issue}44980[#44980])
* [GEO] New ShapeFieldMapper for indexing cartesian geometries {pull}44980[#44980]
* Add Circle Processor {pull}43851[#43851] (issue: {issue}43554[#43554])
* New `shape` field type for indexing Cartesian Geometries {pull}43644[#43644]
Machine Learning::
* Allow the user to specify 'query' in Evaluate Data Frame request {pull}45775[#45775] (issue: {issue}45729[#45729])
* Call the new _estimate_memory_usage API endpoint on data frame analytics _start {pull}45536[#45536] (issues: {issue}44699[#44699], {issue}45544[#45544])
* HLRC for memory usage estimation API {pull}45531[#45531] (issues: {issue}44699[#44699], {issue}45188[#45188])
* Implement ml/data_frame/analytics/_estimate_memory_usage API endpoint {pull}45188[#45188] (issue: {issue}44699[#44699])
[[enhancement-7.4.0]]
[float]
=== Enhancements
Aggregations::
* Add more flexibility to MovingFunction window alignment {pull}44360[#44360] (issue: {issue}42181[#42181])
* Optimize Min and Max BKD optimizations {pull}44315[#44315] (issue: {issue}44290[#44290])
* Allow pipeline aggs to select specific buckets from multi-bucket aggs {pull}44179[#44179]
Allocation::
* Defer reroute when starting shards {pull}44433[#44433] (issues: {issue}42105[#42105], {issue}42738[#42738])
* Allow RerouteService to reroute at lower priority {pull}44338[#44338]
* Auto-release of read-only-allow-delete block when disk utilization fa… {pull}42559[#42559] (issue: {issue}39334[#39334])
Analysis::
* Allow all token/char filters in normalizers {pull}43803[#43803] (issue: {issue}43758[#43758])
Authentication::
* Allow Transport Actions to indicate authN realm {pull}45767[#45767] (issue: {issue}45331[#45331])
* Explicitly fail if a realm only exists in keystore {pull}44471[#44471] (issue: {issue}44207[#44207])
Authorization::
* Add `manage_own_api_key` cluster privilege {pull}45897[#45897] (issue: {issue}40031[#40031])
* Consider `owner` flag when retrieving/invalidating keys with API key service {pull}45421[#45421] (issue: {issue}40031[#40031])
* REST API changes for manage-own-api-key privilege {pull}44936[#44936] (issue: {issue}40031[#40031])
* Simplify API key service API {pull}44935[#44935] (issue: {issue}40031[#40031])
CCR::
* Include leases in error message when operations no longer available {pull}45681[#45681]
CRUD::
* Return seq_no and primary_term for noop update {pull}44603[#44603] (issue: {issue}42497[#42497])
Cluster Coordination::
* Improve slow logging in MasterService {pull}45086[#45086] (issue: {issue}45007[#45007])
* More logging for slow cluster state application {pull}45007[#45007]
* Ignore unknown fields if overriding node metadata {pull}44689[#44689]
* Allow pending tasks before state recovery {pull}44685[#44685] (issue: {issue}44652[#44652])
Distributed::
* Do not create engine under IndexShard#mutex {pull}45263[#45263] (issue: {issue}43699[#43699])
Docs Infrastructure::
* add clarification around TESTSETUP docu and error message {pull}43306[#43306]
Engine::
* Flush engine after big merge {pull}46066[#46066]
* Do sync before closeIntoReader when rolling generation to improve index performance {pull}45765[#45765] (issue: {issue}45371[#45371])
* Refactor index engines to manage readers instead of searchers {pull}43860[#43860]
* Async IO Processor release before notify {pull}43682[#43682]
* Enable indexing optimization using sequence numbers on replicas {pull}43616[#43616] (issue: {issue}34099[#34099])
Features/ILM::
* Add node setting for disabling SLM {pull}46794[#46794] (issue: {issue}38461[#38461])
* Include in-progress snapshot for a policy with get SLM policy API {pull}45245[#45245]
* Add option to filter ILM explain response {pull}44777[#44777] (issue: {issue}44189[#44189])
* Expose index age in ILM explain output {pull}44457[#44457] (issue: {issue}38988[#38988])
Features/Indices APIs::
* Add Clone Index API {pull}44267[#44267] (issue: {issue}44128[#44128])
* Add description to force-merge tasks {pull}41365[#41365] (issue: {issue}15975[#15975])
Features/Ingest::
* Fix IngestService to respect original document content type {pull}45799[#45799]
* Ingest Attachment: Upgrade tika to v1.22 {pull}45575[#45575]
* Retrieve processors instead of checking existence {pull}45354[#45354]
* Add ingest processor existence helper method {pull}45156[#45156]
* Change the ingest simulate api to not include dropped documents {pull}44161[#44161] (issue: {issue}36150[#36150])
Features/Java High Level REST Client::
* Add XContentType as parameter to HLRC ART#createServerTestInstance {pull}46036[#46036] (issue: {issue}45970[#45970])
* Add CloseIndexResponse to HLRC {pull}44349[#44349] (issue: {issue}39687[#39687])
* Add mapper-extras and the RankFeatureQuery in the hlrc {pull}43713[#43713] (issue: {issue}43634[#43634])
* removing background state update of Request object by RequestConverte… {pull}40156[#40156] (issue: {issue}39666[#39666])
* Add delete aliases API to the high-level REST client {pull}32909[#32909] (issue: {issue}27205[#27205])
Features/Watcher::
* Add SSL/TLS settings for watcher email {pull}45272[#45272] (issue: {issue}30307[#30307])
* Watcher reporting: add email warning if CSV attachment contains values that may be interperted as formulas {pull}44460[#44460]
* Watcher add stopped listener {pull}43939[#43939] (issue: {issue}42409[#42409])
* Improve CryptoService error message on missing secure file {pull}43623[#43623] (issue: {issue}43619[#43619])
Geo::
* Support WKT point conversion to geo_point type {pull}44107[#44107] (issue: {issue}41821[#41821])
Infra/Circuit Breakers::
* Fix G1 GC default IHOP {pull}46169[#46169]
Infra/Core::
* Add OCI annotations and adjust existing annotations {pull}45167[#45167] (issues: {issue}45162[#45162], {issue}45166[#45166])
* Use the full hash in build info {pull}45163[#45163] (issue: {issue}45162[#45162])
Infra/Packaging::
* Remove redundant Java check from Sys V init {pull}45793[#45793] (issue: {issue}45593[#45593])
* Notify systemd when Elasticsearch is ready {pull}44673[#44673]
Infra/Plugins::
* Make plugin verification FIPS 140 compliant {pull}44224[#44224] (issue: {issue}41263[#41263])
Infra/Scripting::
* Whitelist randomUUID in Painless {pull}45148[#45148] (issue: {issue}39080[#39080])
* Add missing ZonedDateTime methods for joda compat layer {pull}44829[#44829] (issue: {issue}44411[#44411])
* Remove stale permissions from untrusted policy {pull}44783[#44783]
Infra/Settings::
* Add more meaningful keystore version mismatch errors {pull}46291[#46291] (issue: {issue}44624[#44624])
* Lift the restrictions that uppercase is not allowed in Setting Name. {pull}45222[#45222] (issue: {issue}43835[#43835])
* Normalize environment paths {pull}45179[#45179] (issue: {issue}45176[#45176])
Machine Learning::
* Support boolean fields for data frame analytics {pull}46037[#46037]
* Add description to data frame analytics {pull}45774[#45774]
* Add regression analysis to data frame analytics {pull}45292[#45292]
* Introduce formal node ML role {pull}45174[#45174] (issues: {issue}29943[#29943], {issue}43175[#43175])
* Improve CSV header row detection in find_file_structure {pull}45099[#45099] (issue: {issue}45047[#45047])
* Outlier detection should only fetch docs that have the analyzed fields {pull}44944[#44944]
* Persist DatafeedTimingStats with RefreshPolicy.NONE by default {pull}44940[#44940] (issue: {issue}44792[#44792])
* Add result_type field to TimingStats and DatafeedTimingStats documents {pull}44812[#44812]
* Implement exponential average search time per hour statistics. {pull}44683[#44683] (issue: {issue}29857[#29857])
* Add r_squared eval metric to regression {pull}44248[#44248]
* Adds support for regression.mean_squared_error to eval API {pull}44140[#44140]
* Add DatafeedTimingStats.average_search_time_per_bucket_ms and TimingStats.total_bucket_processing_time_ms stats {pull}44125[#44125] (issue: {issue}29857[#29857])
* Add DatafeedTimingStats to datafeed GetDatafeedStatsAction.Response {pull}43045[#43045] (issue: {issue}29857[#29857])
Network::
* Better logging for TLS message on non-secure transport channel {pull}45835[#45835] (issue: {issue}32688[#32688])
* Asynchronously connect to remote clusters {pull}44825[#44825] (issue: {issue}40150[#40150])
* Improve errors when TLS files cannot be read {pull}44787[#44787] (issue: {issue}43079[#43079])
* Add per-socket keepalive options {pull}44055[#44055]
* Move ConnectionManager to async APIs {pull}42636[#42636]
Ranking::
* Search enhancement: pinned queries {pull}44345[#44345] (issue: {issue}44074[#44074])
* Fix parameter value for calling data.advanceExact {pull}44205[#44205]
* Add l1norm and l2norm distances for vectors {pull}44116[#44116] (issue: {issue}37947[#37947])
Recovery::
* Ignore translog retention policy if soft-deletes enabled {pull}45473[#45473] (issue: {issue}45136[#45136])
* Only retain reasonable history for peer recoveries {pull}45208[#45208] (issue: {issue}41536[#41536])
* Use index for peer recovery instead of translog {pull}45136[#45136] (issues: {issue}38904[#38904], {issue}41536[#41536], {issue}42211[#42211])
* Trim local translog in peer recovery {pull}44756[#44756]
* Make peer recovery send file chunks async {pull}44468[#44468] (issues: {issue}36195[#36195], {issue}44040[#44040])
SQL::
* SQL: Support queries with HAVING over SELECT {pull}46709[#46709] (issue: {issue}37051[#37051])
* SQL: Break TextFormatter/Cursor dependency {pull}45613[#45613] (issue: {issue}45516[#45516])
* SQL: remove deprecated use of "interval" from date_histogram usage {pull}45501[#45501] (issue: {issue}43922[#43922])
* SQL: use hasValue() methods from Elasticsearch's InspectionHelper classes {pull}44745[#44745] (issue: {issue}35745[#35745])
* Switch from using docvalue_fields to extracting values from _source {pull}44062[#44062] (issue: {issue}41852[#41852])
Search::
* Adds usage stats for vectors: {pull}44512[#44512]
* Associate sub-requests to their parent task in multi search API {pull}44492[#44492]
* Cancel search task on connection close {pull}43332[#43332]
Security::
* Set security index refresh interval to 1s {pull}45434[#45434] (issue: {issue}44934[#44934])
Snapshot/Restore::
* add disable_chunked_encoding configuration {pull}44052[#44052]
* Repository Cleanup Endpoint {pull}43900[#43900]
Task Management::
* Remove task null check in TransportAction {pull}45014[#45014]
* TaskListener#onFailure to accept Exception instead of Throwable {pull}44946[#44946]
* Move child task cancellation to TaskManager {pull}44573[#44573] (issue: {issue}44494[#44494])
Transforms::
* Add update transform api endpoint {pull}45154[#45154] (issue: {issue}43438[#43438])
* Add support for bucket_selector {pull}44718[#44718] (issues: {issue}43744[#43744], {issue}44557[#44557])
* Add force delete {pull}44590[#44590] (issue: {issue}43961[#43961])
* Add dynamic cluster setting for failure retries {pull}44577[#44577]
* Add optional defer_validation param to PUT {pull}44455[#44455] (issue: {issue}43439[#43439])
* Add support for geo_bounds aggregation {pull}44441[#44441]
* Add a frequency option to transform config, default 1m {pull}44120[#44120]
[[bug-7.4.0]]
[float]
=== Bug fixes
Aggregations::
* Fix early termination of aggregators that run with breadth-first mode {pull}44963[#44963] (issue: {issue}44909[#44909])
* Support BucketScript paths of type string and array. {pull}44694[#44694] (issue: {issue}44385[#44385])
Allocation::
* Avoid overshooting watermarks during relocation {pull}46079[#46079] (issue: {issue}45177[#45177])
* Cluster health should await events plus other things {pull}44348[#44348]
* Do not copy initial recovery filter during split {pull}44053[#44053] (issue: {issue}43955[#43955])
Analysis::
* Enable reloading of synonym_graph filters {pull}45135[#45135] (issue: {issue}45127[#45127])
* Fix AnalyzeAction response serialization {pull}44284[#44284] (issue: {issue}44078[#44078])
Authentication::
* Fallback to realm authc if ApiKey fails {pull}46538[#46538]
* Enforce realm name uniqueness {pull}46253[#46253]
* Allow empty token endpoint for implicit flow {pull}45038[#45038]
* Do not use scroll when finding duplicate API key {pull}45026[#45026]
* Fix broken short-circuit in getUnlicensedRealms {pull}44399[#44399]
* Fix X509AuthenticationToken principal {pull}43932[#43932] (issues: {issue}34396[#34396], {issue}43796[#43796])
Authorization::
* Do not rewrite aliases on remove-index from aliases requests {pull}46989[#46989]
* Give kibana user privileges to create APM agent config index {pull}46765[#46765] (issue: {issue}45610[#45610])
* Add `manage_own_api_key` cluster privilege {pull}45696[#45696] (issue: {issue}40031[#40031])
* Sparse role queries can throw an NPE {pull}45053[#45053]
CCR::
* Clean up ShardFollowTasks for deleted indices {pull}44702[#44702] (issue: {issue}34404[#34404])
* Skip update if leader and follower settings identical {pull}44535[#44535] (issue: {issue}44521[#44521])
* Avoid stack overflow in auto-follow coordinator {pull}44421[#44421] (issue: {issue}43251[#43251])
* Avoid NPE when checking for CCR index privileges {pull}44397[#44397] (issue: {issue}44172[#44172])
CRUD::
* Ignore replication for noop updates {pull}46458[#46458] (issues: {issue}41065[#41065], {issue}44603[#44603], {issue}46366[#46366])
* Allow _update on write alias {pull}45318[#45318] (issue: {issue}31520[#31520])
* Do not allow version in Rest Update API {pull}43516[#43516] (issue: {issue}42497[#42497])
Cluster Coordination::
* Assert no exceptions during state application {pull}47090[#47090] (issue: {issue}47038[#47038])
* Avoid counting votes from master-ineligible nodes {pull}43688[#43688]
Distributed::
* 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])
* Ensure AsyncTask#isScheduled remain false after close {pull}45687[#45687] (issue: {issue}45576[#45576])
* Update translog checkpoint after marking operations as persisted {pull}45634[#45634] (issue: {issue}29161[#29161])
* Fix clock used in update requests {pull}45262[#45262] (issue: {issue}45254[#45254])
* Restore DefaultShardOperationFailedException's reason during deserialization {pull}45203[#45203]
* Use IndicesModule named writables in elasticsearch-shard tool {pull}45036[#45036] (issue: {issue}44628[#44628])
Engine::
* Handle delete document level failures {pull}46100[#46100] (issue: {issue}46083[#46083])
* Handle no-op document level failures {pull}46083[#46083]
* Remove leniency during replay translog in peer recovery {pull}44989[#44989]
* Throw TranslogCorruptedException in more cases {pull}44217[#44217]
* Fail engine if hit document failure on replicas {pull}43523[#43523] (issues: {issue}40435[#40435], {issue}43228[#43228])
Features/ILM::
* Handle partial failure retrieving segments in SegmentCountStep {pull}46556[#46556]
* Fixes for API specification {pull}46522[#46522]
* Fix SnapshotLifecycleMetadata xcontent serialization {pull}46500[#46500] (issue: {issue}46499[#46499])
* Updated slm API spec parameters and URL {pull}44797[#44797]
* Fix swapped variables in error message {pull}44300[#44300]
Features/Indices APIs::
* Fix a bug where mappings are dropped from rollover requests. {pull}45411[#45411] (issue: {issue}45399[#45399])
* Create index with typeless mapping {pull}45120[#45120]
* Check shard limit after applying index templates {pull}44619[#44619] (issues: {issue}34021[#34021], {issue}44567[#44567], {issue}44619[#44619])
* Validate index settings after applying templates {pull}44612[#44612] (issues: {issue}34021[#34021], {issue}44567[#44567])
Features/Ingest::
* Allow dropping documents with auto-generated ID {pull}46773[#46773] (issue: {issue}46678[#46678])
Features/Java High Level REST Client::
* [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])
* terminateAfter added to the RequestConverter {pull}46474[#46474] (issue: {issue}46446[#46446])
* [Closes #44045] Added 'slices' parameter when submitting reindex request via Java high level REST client {pull}45690[#45690] (issue: {issue}44045[#44045])
* HLRC: Fix '+' Not Correctly Encoded in GET Req. {pull}33164[#33164] (issue: {issue}33077[#33077])
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])
* Fix watcher HttpClient URL creation {pull}45207[#45207] (issue: {issue}44970[#44970])
* Log write failures for watcher history document. {pull}44129[#44129]
Geo::
* Geo: fix geo query decomposition {pull}44924[#44924] (issue: {issue}44891[#44891])
* Geo: add validator that only checks altitude {pull}43893[#43893]
Highlighting::
* Fix highlighting for script_score query {pull}46507[#46507] (issue: {issue}46471[#46471])
Infra/Core::
* Always check that cgroup data is present {pull}45606[#45606] (issue: {issue}45396[#45396])
* Safe publication of DelayedAllocationService and SnapshotShardsService {pull}45517[#45517] (issue: {issue}38560[#38560])
* Add default CLI JVM options {pull}44545[#44545] (issues: {issue}219[#219], {issue}42021[#42021])
* Fix decimal point parsing for date_optional_time {pull}43859[#43859] (issue: {issue}43730[#43730])
Infra/Logging::
* Fix types field in JSON Search Slow Logs {pull}44641[#44641]
* Add types field to JSON slow logs in 7.x {pull}44592[#44592] (issues: {issue}41354[#41354], {issue}44178[#44178])
Infra/Packaging::
* Add destructiveDistroTest meta task {pull}45762[#45762]
* Use bundled JDK in Sys V init {pull}45593[#45593] (issue: {issue}45542[#45542])
* Restore setting up temp dir for windows service {pull}44541[#44541]
Infra/Plugins::
* Do not checksum all bytes at once in plugin install {pull}44649[#44649] (issue: {issue}44545[#44545])
Infra/REST API::
* Improve error message when index settings are not a map {pull}45588[#45588] (issue: {issue}45126[#45126])
* Add is_write_index column to cat.aliases {pull}44772[#44772]
* Fix URL documentation in API specs {pull}44487[#44487]
Infra/Scripting::
* Fix bugs in Painless SCatch node {pull}45880[#45880]
* Fix JodaCompatibleZonedDateTime casts in Painless {pull}44874[#44874]
Infra/Settings::
* bug fix about elasticsearch.common.settings.Settings.processSetting {pull}44047[#44047] (issue: {issue}43791[#43791])
Machine Learning::
* Fix two datafeed flush lockup bugs {pull}46982[#46982]
* Throw an error when a datafeed needs CCS but it is not enabled for the node {pull}46044[#46044] (issue: {issue}46025[#46025])
* Handle "null" value of Estimate memory usage API response gracefully. {pull}45726[#45726] (issue: {issue}44699[#44699])
* Remove timeout on waiting for data frame analytics result processor to complete {pull}45724[#45724] (issue: {issue}45723[#45723])
* Check dest index is empty when starting data frame analytics {pull}45094[#45094]
* Catch any error thrown while closing data frame analytics process {pull}44958[#44958]
* Treat PostDataActionResponse.DataCounts.bucketCount as incremental rather than absolute (total). {pull}44803[#44803] (issue: {issue}44792[#44792])
* Treat big changes in searchCount as significant and persist the document after such changes {pull}44413[#44413] (issues: {issue}44196[#44196], {issue}44335[#44335])
* Update .ml-config mappings before indexing job, datafeed or data frame analytics config {pull}44216[#44216] (issue: {issue}44263[#44263])
* Wait for .ml-config primary before assigning persistent tasks {pull}44170[#44170] (issue: {issue}44156[#44156])
* Fix ML memory tracker lockup when inner step fails {pull}44158[#44158] (issue: {issue}44156[#44156])
* Fix datafeed checks when a concrete remote index is present {pull}43923[#43923] (issue: {issue}42113[#42113])
* Rename outlier detection method values `knn` and `tnn` to `distance_kth_nn` and `distance_knn`
respectively to match the API. {ml-pull}598[#598]
* Fix occasional (non-deterministic) reinitialisation of modeling for the `lat_long`
function. {ml-pull}641[#641]
Mapping::
* Make sure to validate the type before attempting to merge a new mapping. {pull}45157[#45157] (issues: {issue}29316[#29316], {issue}43012[#43012])
* Ensure field caps doesn't error on rank feature fields. {pull}44370[#44370] (issue: {issue}44330[#44330])
* Prevent types deprecation warning for indices.exists requests {pull}43963[#43963] (issue: {issue}43905[#43905])
* Add include_type_name in indices.exitst REST API spec {pull}43910[#43910] (issue: {issue}43905[#43905])
Network::
* Fix Broken HTTP Request Breaking Channel Closing {pull}45958[#45958] (issues: {issue}43362[#43362], {issue}43850[#43850])
* Fix plaintext on TLS port logging {pull}45852[#45852] (issue: {issue}32688[#32688])
* transport.publish_address should contain CNAME {pull}45626[#45626] (issues: {issue}32806[#32806], {issue}39970[#39970])
* Fix bug in copying bytes for socket write {pull}45463[#45463] (issue: {issue}45444[#45444])
Recovery::
* Never release store using CancellableThreads {pull}45409[#45409] (issues: {issue}45136[#45136], {issue}45237[#45237])
* Remove leniency in reset engine from translog {pull}44711[#44711]
Rollup::
* Fix Rollup job creation to work with templates {pull}43943[#43943]
SQL::
* 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: adds format parameter to range queries for constant date comparisons {pull}45326[#45326] (issue: {issue}45139[#45139])
* SQL: uniquely named inner_hits sections for each nested field condition {pull}45039[#45039] (issues: {issue}33080[#33080], {issue}44544[#44544])
* SQL: fix URI path being lost in case of hosted ES scenario {pull}44776[#44776] (issue: {issue}44721[#44721])
* SQL: change the size of the list of concrete indices when resolving multiple indices {pull}43878[#43878] (issue: {issue}43876[#43876])
* SQL: handle double quotes escaping {pull}43829[#43829] (issue: {issue}43810[#43810])
* SQL: add pretty printing to JSON format {pull}43756[#43756]
* SQL: handle SQL not being available in a more graceful way {pull}43665[#43665] (issue: {issue}41279[#41279])
Search::
* Multi-get requests should wait for search active {pull}46283[#46283] (issue: {issue}27500[#27500])
* Ensure top docs optimization is fully disabled for queries with unbounded max scores. {pull}46105[#46105] (issue: {issue}45933[#45933])
* Disallow partial results when shard unavailable {pull}45739[#45739] (issue: {issue}42612[#42612])
* Prevent Leaking Search Tasks on Exceptions in FetchSearchPhase and DfsQueryPhase {pull}45500[#45500]
* Fix an NPE when requesting inner hits and _source is disabled. {pull}44836[#44836] (issue: {issue}43517[#43517])
* Don't use index_phrases on graph queries {pull}44340[#44340] (issue: {issue}43976[#43976])
Security::
* Initialize document subset bit set cache used for DLS {pull}46211[#46211] (issue: {issue}45147[#45147])
* Fix .security-* indices auto-create {pull}44918[#44918]
* SecurityIndexManager handle RuntimeException while reading mapping {pull}44409[#44409]
* Do not swallow I/O exception getting authentication {pull}44398[#44398] (issues: {issue}44172[#44172], {issue}44397[#44397])
* Use system context for looking up connected nodes {pull}43991[#43991] (issue: {issue}43974[#43974])
Snapshot/Restore::
* Fix Bug in Snapshot Status Response Timestamps {pull}46919[#46919] (issue: {issue}46913[#46913])
* GCS deleteBlobsIgnoringIfNotExists should catch StorageException {pull}46832[#46832] (issue: {issue}46772[#46772])
* Fix TransportSnapshotsStatusAction ThreadPool Use {pull}45824[#45824]
* Stop Executing SLM Policy Transport Action on Snapshot Pool {pull}45727[#45727] (issue: {issue}45594[#45594])
* Check again on-going snapshots/restores of indices before closing {pull}43873[#43873]
* Make Timestamps Returned by Snapshot APIs Consistent {pull}43148[#43148] (issue: {issue}43074[#43074])
* Recursively Delete Unreferenced Index Directories {pull}42189[#42189] (issue: {issue}13159[#13159])
Task Management::
* Catch AllocatedTask registration failures {pull}45300[#45300]
Transforms::
* Use field_caps API for mapping deduction {pull}46703[#46703] (issue: {issue}46694[#46694])
* Fix off-by-one error in checkpoint operations_behind {pull}46235[#46235]
* Moves failure state transition for MT safety {pull}45676[#45676] (issue: {issue}45664[#45664])
* Fix _start?force=true bug {pull}45660[#45660]
* Fix failure state transitions and race condition {pull}45627[#45627] (issues: {issue}45562[#45562], {issue}45609[#45609])
* Fix starting a batch data frame after stopping at runtime {pull}45340[#45340] (issues: {issue}44219[#44219], {issue}45339[#45339])
* Fix null aggregation handling in indexer {pull}45061[#45061] (issue: {issue}44906[#44906])
* Unify validation exceptions between PUT and _preview {pull}44983[#44983] (issue: {issue}44953[#44953])
* Treat bulk index failures as an indexing failure {pull}44351[#44351] (issue: {issue}44101[#44101])
* Prevent task from attempting to run when failed {pull}44239[#44239] (issue: {issue}44121[#44121])
* Respond with 409 status code when failing _stop {pull}44231[#44231] (issue: {issue}44103[#44103])
* Add index validations to _start data frame transform {pull}44191[#44191] (issue: {issue}44104[#44104])
* Data frame task failure does not make a 500 response {pull}44058[#44058] (issue: {issue}44011[#44011])
* Audit message missing for autostop {pull}43984[#43984] (issue: {issue}43977[#43977])
[[regression-7.4.0]]
[float]
=== Regressions
Aggregations::
* Implement rounding optimization for fixed offset timezones {pull}46670[#46670] (issue: {issue}45702[#45702])
[[upgrade-7.4.0]]
[float]
=== Upgrades
Infra/Core::
* Update joda to 2.10.3 {pull}45495[#45495]
Infra/Packaging::
* Upgrade to JDK 12.0.2 {pull}45172[#45172]
Network::
* Upgrade to Netty 4.1.38 {pull}45132[#45132]
Search::
* Upgrade to lucene snapshot 8.3.0-snapshot-8dd116a6158 {pull}45604[#45604] (issue: {issue}43976[#43976])
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