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From "Stephen Yuan Jiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16008) A robust way deal with early termination of HBCK
Date Sun, 24 Jul 2016 03:20:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390921#comment-15390921
] 

Stephen Yuan Jiang commented on HBASE-16008:
--------------------------------------------

The {{org.apache.hadoop.hbase.regionserver.TestAtomicOperation.testMultiRowMutationMultiThreads}}
test failure has nothing to do with this patch.

> A robust way deal with early termination of HBCK
> ------------------------------------------------
>
>                 Key: HBASE-16008
>                 URL: https://issues.apache.org/jira/browse/HBASE-16008
>             Project: HBase
>          Issue Type: Improvement
>          Components: hbck
>            Reporter: Stephen Yuan Jiang
>            Assignee: Stephen Yuan Jiang
>         Attachments: HBASE-16008.v0-master.patch, HBASE-16008.v1-branch-1.patch, HBASE-16008.v1-master.patch
>
>
> When HBCK is running, we want to disable Catalog Janitor, Balancer and Split/Merge. 
Today, the implementation is not robust.  If HBCK is terminated earlier by Control-C, the
changed state would not be reset to original.  
> HBASE-15406 was trying to solve this problem for Split/Merge switch.  The implementation
is complicated, and it did not solve CJ and Balancer.  
> The proposal to solve the problem is to use a znode to indicate that the HBCK is running.
 CJ, balancer, and Split/Merge switch all look for this znode before doing it operation. 




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