# Release - Federate 37.1 for 7.17.26 & 8.15.5

**URL:** <https://community.siren.io/t/release-federate-37-1-for-7-17-26-8-15-5/732>\
**Category:** Announcements\
**Created:** [December 18, 2024, 9:13am UTC](https://community.siren.io/t/release-federate-37-1-for-7-17-26-8-15-5/732 "2024-12-18T09:13:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Issac\_Garcia](https://yyz2.discourse-cdn.com/flex032/user_avatar/community.siren.io/issac_garcia/32/263_2.png) [@Issac\_Garcia](https://community.siren.io/u/Issac_Garcia)\
**Post date:** [December 18, 2024, 9:13am UTC](https://community.siren.io/t/release-federate-37-1-for-7-17-26-8-15-5/732/1 "2024-12-18T09:13:38Z")

</div>

We’re happy to announce the release of Siren Federate version 37.0 & 37.1 for Elasticsearch 7.17 & Elasticsearch 8.15. This release includes the following features, improvements and bug fixes:

37.1

Improvements

- Upgraded to Elasticsearch 8.15.5 & 7.17.26

Bug Fixes

- Reintroduced the `json-ws` processor, which was previously removed as part of the connector’s deprecation on v37.

37.0

WARNING: Don’t use this version if you need `json-ws` processor. Use version 37.1 or later.

Improvements

- Upgraded to Elasticsearch 8.15.3 & 7.17.25
- Switched to memory-unsafe instead of memory-netty for the management of off-heap memory.
- Improved the internal behavior of joins in aggregations for AQP requests.
- Improved the error message for incompatible data types in a join.
- Added a new setting, `federate.internal.actions.timeout`, to configure a timeout for internal actions, with a default value of 30 seconds.
- Improved concurrency management on multi-search requests.
- Added descriptions for every Federate task.
- Added planner execution times for AQP requests.

New features

- Added support to multi-conditional index join in AQP requests.
- Added support for `federate_object` in AQP requests.
- Implemented a stage-based cost optimization strategy in AQP.
- Added a push-down strategy for joins in aggregations for AQP requests.
- Added support for point-in-time with inner join in AQP requests.
- Added support for a join on the `_index` virtual field on the left side.
- Added a new setting `federate.planner.type` to choose between `adaptive` or `static` for the default planner to use in search requests.

Bug Fixes

- Fixed an `Unknown QueryBuilder error` when a GeoPoint query was used inside a join request.
- Fixed an issue with requests using `highlighter` on cached requests.
- Fixed a resource leak that occurred during job initialization.
- Fixed a race condition in the data staging service.
- Fixed a NullPointerException when an error occurred and the cause message was null.
- Fixed a bug caused by using an unsupported operation of `exists` in the aggregation context with projected fields.
- Fixed a concurrent modification exception in a multi-search request.
- Fixed a bug caused by skipping the pruning step when an error occurred during the request planning phase.

Breaking changes

- Removed the `json-ws` processor.
- Removed the deprecated connector API.
- Reverted a breaking change in deprecated endpoint `/_siren/cache` and `/_siren/<nodeId>/cache` introduced in 36.1.
- Removed the following deprecated settings:
  - `siren.planner.pool.job.size` - use `federate.planner.pool.job.size` instead.
  - `siren.planner.pool.job.queue_size` - use `federate.planner.pool.job.queue_size` instead.
  - `siren.planner.pool.tasks_per_job.size` - use `federate.planner.pool.tasks_per_job.size` instead.
  - `siren.planner.index_join.max_lookups` - use `federate.planner.multi_conditional.index_lookup.limit` instead.
  - `siren.planner.volcano.cache.enable` - use `federate.planner.optimizer.cache.enable` instead.
  - `siren.planner.field.metadata.cache.maximum_size` - use `federate.planner.field.metadata.cache.maximum_size` instead.
  - `siren.planner.volcano.cache.maximum_size` - use `federate.planner.optimizer.cache.maximum_size` instead.
  - `siren.planner.volcano.cache.refresh_interval` - use `federate.planner.optimizer.cache.refresh_interval` instead.
  - `siren.planner.volcano.stats.use_query` - removed without replacement.

Download it [here](https://siren.io/downloads/?product=siren-federate).