The Apache Helix team would like to announce the release of Apache Helix 0.9.7.

This is the twenty-second release under the Apache umbrella, and the eighteenth as a top-level project.

Helix is a generic cluster management framework used for the automatic management of partitioned, replicated and distributed resources hosted on a cluster of nodes.

In this release, Helix provides several performance improvements for rebalance pipeline:

Key Note for Helix Release

Critical Bug Fixes and Craftsmanship Improvements

In this release, we fixed several critical bugs in Helix Controller and rebalancers. There are also several fixes for craftsmanship and usability improvements.

Detailed Changes

Bug Fixes

  • Async write operation should not throw Exception for serializing error (#845)


  • Downgrade the log level to INFO when isInstanceSetup() fails. (#870)
  • Add system property options to config write size limit for ZNRecord Serializer (#809)

Cheers, -- The Apache Helix Team

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