Release notes

Upgraded to Elasticsearch 8.18.4.

Added support for comma-separated indices in the join clause.

Removed the preference parameter for fingerprint computation.

Added ignore_query_cache query parameter to skip join query cache pruning strategy.

Improved the search-project task when the query is rewritten into a match_all.

Improved the initialization and cleanup job responsibilities.

Improved the concurrent execution of queries.

Removed unnecessary usage of the Guava EventBus.

Improved asynchronous execution in multi-search requests.

Added support for named join queries.

Fixed a concurrent modification issue when creating task nodes.

Fixed an issue with dangling tasks in case of task cancellation failure.

Fixed a race condition when notifying task completion.

Fixed a validation rule in the static planner when joining on _index.

Fixed the took response time value to reflect the planner’s took_in_millis value.

Fixed request failures when shard allocation was disabled.

Fixed a race condition in the data upload queue.

Fixed a concurrent modification error when logging task metrics.

Fixed a missing entitlement entry for the json-ws processor.

Set Adaptive Query Planner (AQP) as a default planner.

Introduced a Federate transport layer to detect rolling upgrades and support retro-compatible requests during the upgrade process.

Implemented an input swap optimization for multi-conditional and spatial index joins.

Added join capabilities to KNN (K-Nearest Neighbors) Elasticsearch Query.

Added preliminary support for Search Guard FLX.

Upgraded to Elasticsearch 8.18.0.

Aggregated shard-level operations into a single request per-node (i.e. leverage TransportBroadcastByNodeAction).

Improved the physical data signature and DataId in AQP requests.

Reduced the amount of data shared if the debug is disabled.

Enhanced memory error messages.

Optimized lock operations in LRU Cache.

Removed the usage of Class.forName for obfuscated classes.

Improved resource cleanup when a node becomes isolated.

Protected cached nested joins from eviction.

Improved the performance of the fingerprint computation.

Deprecated the Static Query Planner. Note: In versions 38.0 or later, the Adaptive Query Planner (AQP) is the default planner.

Reintroduced the json-ws processor, which was previously removed as part of the connector’s deprecation.

Fixed projection issues with floating-point values in nested joins.

Fixed pagination of join queries when the join was cached.

Fixed index ordering to ensure deterministic request cache keys.

Fixed a fingerprint computation issue that ignored the segment life cycle.

Fixed incorrect behavior in Boolean queries using the minimum_should_match parameter on AQP requests.

Fixed an issue retrieving debug responses when the track_total_hits parameter was disabled.

Fixed a caching issue in Point-In-Time requests.

Fixed a bug with cached join queries using function_score in combination with the min_score parameter.

Fixed an issue with cached queries using runtime fields.

This version introduced a Federate transport layer to allow retro-compatibility in case of rolling upgrade for the following versions. This version is not compatible with previous Federate versions during a rolling upgrade.