IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Elasticsearch version 7.8.0
editElasticsearch version 7.8.0
editAlso see Breaking changes in 7.8.
Known issues
edit-
SQL: If a
WHERE
clause contains at least two relational operators joined byAND
, of which one is a comparison (<=
,<
,>=
,>
) and another one is an inequality (!=
,<>
), both against literals or foldable expressions, the inequality will be ignored. The workaround is to substitute the inequality with aNOT IN
operator.We have fixed this issue in Elasticsearch 7.10.1 and later versions. For more details, see #65488.
Breaking changes
editDeprecations
edit- Authentication
-
-
Deprecate the
kibana
reserved user; introducekibana_system
user #54967
-
Deprecate the
- Cluster Coordination
- Features/Features
- Features/Indices APIs
-
- Deprecate local parameter for get field mapping request #55014
- Infra/Core
-
- Deprecate node local storage setting #54374
- Infra/Plugins
-
- Add xpack setting deprecations to deprecation API #56290 (issue: #54745)
- Deprecate disabling basic-license features #54816 (issue: #54745)
- Deprecated xpack "enable" settings should be no-ops #55416 (issues: #54745, #54816)
- Make xpack.ilm.enabled setting a no-op #55592 (issues: #54745, #54816, #55416)
- Make xpack.monitoring.enabled setting a no-op #55617 (issues: #54745, #54816, #55416, #55461, #55592)
- Restore xpack.ilm.enabled and xpack.slm.enabled settings #57383 (issues: #54745, #55416, #55592)
New features
edit- Aggregations
- Features/Indices APIs
- Geo
- SQL
Enhancements
edit- Aggregations
- Allocation
- Analysis
- Audit
- Authentication
-
- Let realms gracefully terminate the authN chain #55623
- Authorization
-
- Add reserved_ml_user and reserved_ml_admin kibana privileges #54713
- Autoscaling
-
- Rollover: refactor out cluster state update #53965
- CRUD
-
- Avoid holding onto bulk items until all completed #54407
- Cluster Coordination
- Features/CAT APIs
- Features/Indices APIs
-
- Add HLRC support for simulate index template api #55936 (issue: #53101)
- Add prefer_v2_templates flag and index setting #55411 (issue: #53101)
- Add warnings/errors when V2 templates would match same indices as V1 #54367 (issue: #53101)
- Disallow merging existing mapping field definitions in templates #57701 (issues: #55607, #55982, #57393)
- Emit deprecation warning if multiple v1 templates match with a new index #55558 (issue: #53101)
- Guard adding the index.prefer_v2_templates settings for pre-7.8 nodes #55546 (issues: #53101, #55411, #55539)
- Handle merging dotted object names when merging V2 template mappings #55982 (issue: #53101)
- Throw exception on duplicate mappings metadata fields when merging templates #57835 (issue: #57701)
- Update template v2 api rest spec #55948 (issue: #53101)
- Use V2 index templates during index creation #54669 (issue: #53101)
- Use V2 templates when reading duplicate aliases and ingest pipelines #54902 (issue: #53101)
- Validate V2 templates more strictly #56170 (issues: #43737, #46045, #53101, #53970)
- Features/Java High Level REST Client
-
- Enable support for decompression of compressed response within RestHighLevelClient #53533
- Features/Stats
- Features/Watcher
- Geo
- Infra/Core
-
- Decouple Environment from DiscoveryNode #54373
- Ensure that the output of node roles are sorted #54376 (issue: #54370)
- Reintroduce system index APIs for Kibana #54858 (issues: #52385, #53912)
- Schedule commands in current thread context #54187 (issue: #17143)
- Start resource watcher service early #54993 (issue: #54867)
- Infra/Packaging
- Infra/REST API
-
- Add validation to the usage service #54617
- Infra/Scripting
- Machine Learning
-
- Add effective max model memory limit to ML info #55529 (issue: #63942)
- Add loss_function to regression #56118
- Add new inference_config field to trained model config #54421
- Add failed_category_count to model_size_stats #55716 (issue: #1130)
- Add prediction_field_type to inference config #55128
- Allow a certain number of ill-formatted rows when delimited format is specified #55735 (issue: #38890)
- Apply default timeout in StopDataFrameAnalyticsAction.Request #55512
- Create an annotation when a model snapshot is stored #53783 (issue: #52149)
- Do not execute ML CRUD actions when upgrade mode is enabled #54437 (issue: #54326)
- Make find_file_structure recognize Kibana CSV report timestamps #55609 (issue: #55586)
- More advanced model snapshot retention options #56125 (issue: #52150)
- Return assigned node in start/open job/datafeed response #55473 (issue: #54067)
- Skip daily maintenance activity if upgrade mode is enabled #54565 (issue: #54326)
- Start gathering and storing inference stats #53429
- Unassign data frame analytics tasks in SetUpgradeModeAction #54523 (issue: #54326)
- Speed up anomaly detection for the lat_long function #1102
- Reduce CPU scheduling priority of native analysis processes to favor the ES JVM when CPU is constrained. This change is implemented only for Linux and macOS, not for Windows #1109
-
Take
training_percent
into account when estimating memory usage for classification and regression #1111 - Support maximize minimum recall when assigning class labels for multiclass classification #1113
- Improve robustness of anomaly detection to bad input data #1114
-
Add new
num_matches
andpreferred_to_categories
fields to category output #1062 - Add mean squared logarithmic error (MSLE) for regression #1101
- Add pseudo-Huber loss for regression #1168
- Reduce peak memory usage and memory estimates for classification and regression #1125.)
- Reduce variability of classification and regression results across our target operating systems #1127
- Switch data frame analytics model memory estimates from kilobytes to megabytes #1126 (issue: #54506)
- Add a machine learning native code build for Linux on AArch64 #1132, #1135
- Improve data frame analytics runtime by optimising memory alignment for intrinsic operations #1142
- Fix spurious anomalies for count and sum functions after no data are received for long periods of time #1158
- Improve false positive rates from periodicity test for time series anomaly detection #1177
- Break progress reporting of data frame analyses into multiple phases #1179
- Really centre the data before training for classification and regression begins. This means we can choose more optimal smoothing bias and should reduce the number of trees #1192
- Mapping
- Recovery
- SQL
- Search
- Snapshot/Restore
-
- Add GCS support for searchable snapshots #55403
- Allocate searchable snapshots with the balancer #54889 (issues: #50999, #54729)
- Allow bulk snapshot deletes to abort #56009 (issue: #55773)
- Allow deleting multiple snapshots at once #55474
- Allow searching of snapshot taken while indexing #55511 (issue: #50999)
- Allow to prewarm the cache for searchable snapshot shards #55322
- Enable prewarming by default for searchable snapshots #56201 (issue: #55952)
- Permit searches to be concurrent to prewarming #55795
- Reduce contention in CacheFile.fileLock() method #55662
- Require soft deletes for searchable snapshots #55453
- Searchable Snapshots should respect max_restore_bytes_per_sec #55952
- Update the HDFS version used by HDFS Repo #53693
- Use streaming reads for GCS #55506 (issue: #55505)
- Use workers to warm cache parts #55793 (issue: #55322)
- Task Management
- Transform
Bug fixes
edit- Aggregations
-
- Add analytics plugin usage stats to _xpack/usage #54911 (issue: #54847)
- Aggregation support for Value Scripts that change types #54830 (issue: #54655)
- Allow terms agg to default to depth first #54845
- Clean up how pipeline aggs check for multi-bucket #54161 (issue: #53215)
- Fix auto_date_histogram serialization bug #54447 (issues: #54382, #54429)
- Fix error massage for unknown value type #55821 (issue: #55727)
- Fix scripted metric in CCS #54776 (issue: #54758)
- Use Decimal formatter for Numeric ValuesSourceTypes #54366 (issue: #54365)
- Allocation
- Features/ILM+SLM
-
- ILM stop step execution if writeIndex is false #54805
- Features/Indices APIs
-
- Fix NPE in MetadataIndexTemplateService#findV2Template #54945
- Fix creating filtered alias using now in a date_nanos range query failed #54785 (issue: #54315)
- Fix simulating index templates without specified index #56295 (issues: #53101, #56255)
- Validate non-negative priorities for V2 index templates #56139 (issue: #53101)
- Features/Watcher
-
- Ensure watcher email action message ids are always unique #56574
- Infra/Core
- Machine Learning
-
- Fix GET _ml/inference so size param is respected #57303 (issue: #57298)
- Fix file structure finder multiline merge max for delimited formats #56023
- Validate at least one feature is available for DF analytics #55876 (issue: #55593)
- Trap and fail if insufficient features are supplied to data frame analyses. Otherwise, classification and regression got stuck at zero analyzing progress #1160 (issue: #55593)
- Make categorization respect the model_memory_limit #1167 (issue: #1130)
- Respect user overrides for max_trees for classification and regression #1185
- Reset memory status from soft_limit to ok when pruning is no longer required #1193 (issue: #1131)
- Fix restore from training state for classification and regression #1197
- Improve the initialization of seasonal components for anomaly detection #1201 (issue: #1178)
- Network
- SQL
- Search
- Security
- Transform