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| Release Notes for Apache Helix 0.6.2-incubating |
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| |
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| |
| Release Notes for Apache Helix 0.6.2-incubating |
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| The Apache Helix team would like to announce the release of Apache Helix 0.6.2-incubating |
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| This is the third release under the Apache umbrella. |
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| 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: |
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| * Automatic assignment of resource/partition to nodes |
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| * Node failure detection and recovery |
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| * Dynamic addition of Resources |
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| * Dynamic addition of nodes to the cluster |
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| * Pluggable distributed state machine to manage the state of a resource via state transitions |
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| * Automatic load balancing and throttling of transitions |
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| [] |
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| * Changes |
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| ** Sub-task |
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| * [HELIX-28] - ZkHelixManager.handleNewSession() can happen when a liveinstance already exists |
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| * [HELIX-85] - Remove mock service module |
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| * [HELIX-106] - Remove all string constants in the code |
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| * [HELIX-107] - Add support to set custom objects into ZNRecord |
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| * [HELIX-124] - race condition in ZkHelixManager.handleNewSession() |
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| * [HELIX-165] - Add dependency for Guava libraries |
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| * [HELIX-169] - Take care of consecutive handleNewSession() and session expiry during handleNewSession() |
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| * [HELIX-170] - HelixManager#isLeader() should compare both instanceName and sessionId |
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| * [HELIX-195] - Race condition between FINALIZE callbacks and Zk Callbacks |
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| * [HELIX-207] - Add javadocs to classes and public methods in the top-level package |
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| * [HELIX-208] - Add javadocs to classes and public methods in the model package |
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| * [HELIX-277] - FULL_AUTO rebalancer should not prefer nodes that are just coming up |
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| ** Bug |
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| * [HELIX-7] - Tune test parameters to fix random test failures |
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| * [HELIX-87] - Bad repository links in website |
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| * [HELIX-117] - backward incompatibility problem in accessing zkPath vis HelixWebAdmin |
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| * [HELIX-118] - PropertyStore -> HelixPropertyStore backwards incompatible location |
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| * [HELIX-119] - HelixManager serializer no longer needs ByteArraySerializer for /PROPERTYSTORE |
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| * [HELIX-129] - ZKDumper should use byte[] instead of String to read/write file/zk |
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| * [HELIX-131] - Connection timeout not set while connecting to zookeeper via zkHelixAdmin |
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| * [HELIX-133] - Cluster-admin command parsing does not work with removeConfig |
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| * [HELIX-140] - In ClusterSetup.java, the removeConfig is wrong wired to getConfig |
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| * [HELIX-141] - Autorebalance does not work reliably and fails when replica>1 |
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| * [HELIX-144] - Need to validate StateModelDefinition when adding new StateModelDefinition to Cluster |
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| * [HELIX-147] - Fix typo in Idealstate property max_partitions_per_instance |
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| * [HELIX-148] - Current preferred placement for auto rebalace is suboptimal for n > p |
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| * [HELIX-150] - Auto rebalance might not evenly distribute states across nodes |
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| * [HELIX-151] - Auto rebalance doesn't assign some replicas when other nodes could make room |
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| * [HELIX-153] - Auto rebalance tester uses the returned map fields, but production uses only list fields |
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| * [HELIX-155] - PropertyKey.instances() is wrongly wired to CONFIG type instead of INSTANCES type |
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| * [HELIX-197] - state model leak |
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| * [HELIX-199] - ZNRecord should not publish rawPayload unless it exists |
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| * [HELIX-216] - Allow HelixAdmin addResource to accept the old rebalancing types |
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| * [HELIX-221] - Can't find default error->dropped transition method using name convention |
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| * [HELIX-257] - Upgrade Restlet to 2.1.4 - due security flaw |
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| * [HELIX-258] - Upgrade Apache Camel due to CVE-2013-4330 |
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| * [HELIX-264] - fix zkclient#close() bug |
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| * [HELIX-279] - Apply gc handling fixes to main ZKHelixManager class |
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| * [HELIX-280] - Full auto rebalancer should check for resource tag first |
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| * [HELIX-288] - helix-core uses an old version of guava |
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| * [HELIX-299] - Some files in 0.6.2 are missing license headers |
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| ** Improvement |
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| * [HELIX-20] - AUTO-REBALANCE helix controller should re-assign disabled partitions on a node to other available nodes |
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| * [HELIX-70] - Make Helix OSGi ready |
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| * [HELIX-149] - Allow clients to pass in preferred placement strategies |
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| * [HELIX-198] - Unify helix code style |
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| * [HELIX-218] - Add a reviewboard submission script |
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| * [HELIX-284] - Support participant auto join in YAML cluster setup |
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| ** New Feature |
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| * [HELIX-215] - Allow setting up the cluster with a YAML file |
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| ** Task |
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| * [HELIX-95] - Tracker for 0.6.2 release |
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| * [HELIX-154] - Auto rebalance algorithm should not depend on state |
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| * [HELIX-166] - Rename modes to auto, semi-auto, and custom |
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| * [HELIX-173] - Move rebalancing strategies to separate classes that implement the Rebalancer interface |
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| * [HELIX-188] - Add admin command line / REST API documentations |
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| * [HELIX-194] - ZNRecord has too many constructors |
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| * [HELIX-205] - Have user-defined rebalancers use RebalanceMode.USER_DEFINED |
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| * [HELIX-210] - Add support to set data with expect version in BaseDataAccessor |
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| * [HELIX-217] - Remove mock service module |
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| * [HELIX-273] - Rebalancer interface should remain unchanged in 0.6.2 |
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| * [HELIX-274] - Verify FULL_AUTO tagged node behavior |
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| * [HELIX-285] - add integration test util's |
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| [] |
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| Cheers, |
| -- |
| The Apache Helix Team |
