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https://issues.apache.org/jira/browse/HBASE-11405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14148205#comment-14148205
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Hudson commented on HBASE-11405:
--------------------------------
SUCCESS: Integrated in HBase-0.98-on-Hadoop-1.1 #516 (See
[https://builds.apache.org/job/HBase-0.98-on-Hadoop-1.1/516/])
HBASE-11405 Multiple invocations of hbck in parallel disables balancer
permanently (Sean Busbey and bharath v) (tedyu: rev
f73f18abbb26e37e955e77e1a7698d1a50aaa32c)
* hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestHBaseFsck.java
> Multiple invocations of hbck in parallel disables balancer permanently
> -----------------------------------------------------------------------
>
> Key: HBASE-11405
> URL: https://issues.apache.org/jira/browse/HBASE-11405
> Project: HBase
> Issue Type: Bug
> Components: Balancer, hbck
> Affects Versions: 0.99.0
> Reporter: bharath v
> Assignee: bharath v
> Fix For: 2.0.0, 0.98.7, 0.94.24, 0.99.1
>
> Attachments: 11405-0.98-v2.patch, 11405-1.0.txt, 11405-v3.txt,
> 11405-v5.patch, 11405-v6.patch, 11405v7.patch, HBASE-11405-0.94.patch.txt,
> HBASE-11405-0.98.patch.txt, HBASE-11405-trunk-rebased.patch,
> HBASE-11405-trunk.patch, HBASE-11405-trunk.patch.1,
> hbase-11405.rebase.140911.patch
>
>
> This is because of the following piece of code in hbck
> {code:borderStyle=solid}
> boolean oldBalancer = admin.setBalancerRunning(false, true);
> try {
> onlineConsistencyRepair();
> }
> finally {
> admin.setBalancerRunning(oldBalancer, false);
> }
> {code}
> Newer invocations set oldBalancer to false as it was disabled by previous
> invocations and this disables balancer permanently unless its manually turned
> on by the user. Easy to reproduce, just run hbck 100 times in a loop in 2
> different sessions and you can see that balancer is set to false in the
> HMaster logs.
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