# Release - Federate v26

**URL:** <https://community.siren.io/t/release-federate-v26/426>\
**Category:** Announcements\
**Created:** [November 16, 2021, 2:49pm UTC](https://community.siren.io/t/release-federate-v26/426 "2021-11-16T14:49:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![renaud.delbru](https://yyz2.discourse-cdn.com/flex032/user_avatar/community.siren.io/renaud.delbru/32/13_2.png) [@renaud.delbru](https://community.siren.io/u/renaud.delbru)\
**Post date:** [November 16, 2021, 2:49pm UTC](https://community.siren.io/t/release-federate-v26/426/1 "2021-11-16T14:49:08Z")

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We’re happy to announce today the release of Siren Federate version 26, which is compatible with Elasticsearch version 7.15.1. This release includes the following enhancements and fixes:

Enhancements:

- Parts of our tuple-at-a-time query processing pipeline are replaced with a _vectorized_ query processing pipeline. This will improve the overall performance of the system by increasing the worker thread throughput and by reducing in-memory I/O load by using a contiguous memory chunk. Our objective is to complete this work and switch to a fully-vectorized query processing pipeline in Siren Federate version 27. A benchmark report will be published at release time.
- Upgraded to Elasticsearch version 7.15.1.

Breaking changes:

- Removed a deprecated property, `siren.io.netty.maxDirectMemory`, in favor of the `siren.memory.root.limit` setting.
- If Search Guard is the configured security system, the node-level setting `searchguard.allow_custom_headers: "siren.*"` must be added to each node of the cluster.
- Changed the format of the JSON response for Cluster APIs Nodes Statistics.

Bug fixes:

- Fixed a join cache issue with Elastic Stack Security’s templated queries when they include placeholders such as `{{ _user: user.name }}`.
- Fixed a `ConcurrentModificationException` in the select phase following a recent change in Elasticsearch 7.15 involving the `FieldUsageTrackingDirectoryReader`.
- Adjusted the validation query in the datasource validation endpoint with the latest Avatica JDBC connector.
- Adjusted the autoCommit setting to work with the latest Avatica JDBC connector.
- Fixed a rare issue where a cluster is unable to initialize a Federate job due to a closed `RootBufferManager` on a node.
- Fixed a broken link to the `_sample` method in the connector APIs documentation.

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