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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6046) Master retry on ZK session expiry causes inconsistent region assignments.
Date Tue, 05 Jun 2012 17:06:24 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13289536#comment-13289536
] 

Hudson commented on HBASE-6046:
-------------------------------

Integrated in HBase-TRUNK #2989 (See [https://builds.apache.org/job/HBase-TRUNK/2989/])
    HBASE-6046 Master retry on ZK session expiry causes inconsistent region assignments. (Asutosh)
(Revision 1346460)

     Result = FAILURE
ramkrishna : 
Files : 
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/TestZooKeeper.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitor.java

                
> Master retry on ZK session expiry causes inconsistent region assignments.
> -------------------------------------------------------------------------
>
>                 Key: HBASE-6046
>                 URL: https://issues.apache.org/jira/browse/HBASE-6046
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.92.1, 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: HBASE_6046-trunk.patch, HBASE_6046_0.94.patch, HBASE_6046_0.94_1.patch,
HBASE_6046_0.94_2.patch, HBASE_6046_0.94_3.patch
>
>
> 1> ZK Session timeout in the hmaster leads to bulk assignment though all the RSs are
online.
> 2> While doing bulk assignment, if the master again goes down & restart(or backup
comes up) all the node created in the ZK will now be tried to reassign to the new RSs. This
is leading to double assignment.
> we had 2800 regions, among this 1900 region got double assignment, taking the region
count to 4700. 

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