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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HELIX-277) FULL_AUTO rebalancer should not prefer nodes that are just coming up
Date Sat, 26 Oct 2013 21:20:30 GMT

    [ https://issues.apache.org/jira/browse/HELIX-277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13806167#comment-13806167
] 

Hudson commented on HELIX-277:
------------------------------

FAILURE: Integrated in helix #1196 (See [https://builds.apache.org/job/helix/1196/])
[HELIX-277] FULL_AUTO rebalancer should not prefer nodes that are just coming up (kanak: rev
90faf91bb87594c67be23a1e4547e81f58ea7c8e)
* helix-core/src/main/java/org/apache/helix/controller/rebalancer/AutoRebalancer.java
* helix-core/src/main/java/org/apache/helix/controller/strategy/AutoRebalanceStrategy.java
* helix-core/src/test/java/org/apache/helix/controller/strategy/TestAutoRebalanceStrategy.java


> FULL_AUTO rebalancer should not prefer nodes that are just coming up
> --------------------------------------------------------------------
>
>                 Key: HELIX-277
>                 URL: https://issues.apache.org/jira/browse/HELIX-277
>             Project: Apache Helix
>          Issue Type: Sub-task
>            Reporter: Kanak Biscuitwala
>            Assignee: Kanak Biscuitwala
>
> Rebalancing in FULL_AUTO mode will relentlessly (though mostly greedily) seek a balance
in both partitions and states across nodes with minimal movement. However, in this pursuit,
we may end up requiring multiple transitions to get a node in the right state for a given
partition.
> We can fix this by refusing to prefer nodes as they come up, and then revert to the existing
strategy once their current state contains a replica.



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