The Apache Helix team would like to announce the release of Apache Helix 0.6.9.

This is the twelfth release under the Apache umbrella, and the eighth 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. Helix provides the following features:

  • Automatic assignment of resource/partition to nodes
  • Node failure detection and recovery
  • Dynamic addition of Resources
  • Dynamic addition of nodes to the cluster
  • Pluggable distributed state machine to manage the state of a resource via state transitions
  • Automatic load balancing and throttling of transitions

Detailed Changes

Feature

  • [HELIX-669] - Support state transition cancellation.
  • [HELIX-668] - Support configurable latency for participant health report.
  • [HELIX-659] - Extend Helix to Support Resource with Multiple States.
  • [HELIX-654] - Running task rebalance.
  • Support Job Level Expiration.

Bug

  • [HELIX-668] Fix remove context with namespaced job name
  • [HELIX-670] Fix typo in Javadoc
  • Fix disconnected zkConnection issue.
  • Fix Semi-Auto state transition jump to top state when instance just connected back.
  • Fix JobQueue ignoring FailedThreshold.

Improvement

  • Record workflow scheduling history in recurrent workflows.
  • Add API in StateModelDefinition to get second top states
  • Add protective check for ZKHelixAdmin.dropInstance()
  • Add protective check for ZooKeeper writing data that is bigger than 1MB

Cheers, -- The Apache Helix Team

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