Release notes



  • Improved off-heap memory management of data packets by leveraging the Elasticsearch API for tracking references to a resource.

Bugs fixes

  • Fixed execution of a join query with a query referencing a runtime field at the same level.

  • Fixed a waiting thread issue when a packet upload is rejected by the thread pool.

  • Fixed execution of a join query with a script query at the same level.


New Features

  • Added ROUTING_JOIN as a new join algorithm optimized for use cases when joining on the parent set’s _id field.

  • Added the Siren Consolidator, an ingest processor for consolidating data from different indices, as part of the Siren Federate plugin.

  • Added a new REST API _siren/nodes/benchmark that can be used to evaluate different aspects of the Federate plugin.


  • Implemented compatibility with Elasticsearch 8.4.3.

  • Improved the performance of joins on the _id field.

  • Upgrade to Arrow 9.0.0.

  • Adopt JPMS (Java Platform Module System).

  • Update architecture diagram.

  • Improved networking performance of the search-project task.

  • Updated default values for the following settings:

    • The setting that sets the number of partitions per node used in the HASH_JOIN algorithm, now defaults to the number of CPUs - 1.

    • The setting that sets the size of data packets sent between nodes of the cluster now defaults to 1MB.

Bugs fixes

  • Fixed dead links in the documentation.

  • Fixed an issue that could cause a node to cache failed statistics.

  • Fixed a race condition issue when executing a multi-search request.

  • Fixed ClassCastException and properly handle unsupported cases of projecting fields on virtual indices.

Breaking changes

  • Remove deprecated and unused actions over virtual indices.

  • Removed deprecated settings and