The Apache Helix would like to announce the release of Apache Helix 0.6.1-incubating

This is the second release in Apache umbrella.

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

Changes

Bug

  • [HELIX-25] - setConfig should check if instance exist or not when setting PARTICIPANT config
  • [HELIX-29] - Not receiving transitions after participant reconnection
  • [HELIX-30] - ZkHelixManager.carryOverPreviousCurrentState() should use a special merge logic
  • [HELIX-34] - Remove watches after the node /resource is deleted
  • [HELIX-35] - Support custom instance id format in CLI
  • [HELIX-41] - fix intermittent test failures
  • [HELIX-44] - ZkHelix property store is not checking the validity of path
  • [HELIX-55] - Session timeout setting not honoured
  • [HELIX-75] - ZKHelixManager declares throws Exception
  • [HELIX-76] - ChangeLogGenerator split bug

Improvements

  • [HELIX-31] - Detect flapping and disable the participant/controller/spectator
  • [HELIX-32] - Flapping detection: if a helix manager starts connect/disconnect frequently it should be disconnected
  • [HELIX-64] - Allow application to provide additional metadata while connecting to cluster
  • [HELIX-73] - Remove assumption that Instance.id is always host_port
  • [HELIX-81] - org.apache.helix.manager.zk.ZKUtil#isClusterSetup() should not log error

New Features

  • [HELIX-19] - Allow process to join the cluster dynamically
  • [HELIX-43] - Add support for error->dropped transition
  • [HELIX-45] - Standalone helix agent
  • [HELIX-63] - Make the idealstate computation code pluggable
  • [HELIX-72] - Allow pluggable rebalancer in controller

Tasks

  • [HELIX-16] - Distributed task execution framework sample app

Cheers, -- The Apache Helix Team

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