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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-3716) Intermittent TestRegionRebalancing failure
Date Wed, 30 Mar 2011 18:56:05 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu updated HBASE-3716:
--------------------------

    Attachment: 3716.txt

Also made changes to the return value of HMaster.balance().
Previously true was always returned even if there was no actual balancing action.
TestRegionRebalancing, TestMultiParallel and TestMasterObserver all pass.

> Intermittent TestRegionRebalancing failure
> ------------------------------------------
>
>                 Key: HBASE-3716
>                 URL: https://issues.apache.org/jira/browse/HBASE-3716
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>         Attachments: 3716.txt
>
>
> See HBase-TRUNK build #1820
> This could be due to HBASE-3681
> In trunk, default value of "hbase.regions.slop" is 20%. It is possible for load balancer
to see region distribution which falls within 20% of optimal distribution.
> However, assertRegionsAreBalanced() uses 10% slop.
> One solution is to align the slop in assertRegionsAreBalanced() with "hbase.regions.slop"
value.

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