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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9696) Master recovery ignores online merge znode
Date Fri, 11 Oct 2013 06:54:42 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792409#comment-13792409
] 

stack commented on HBASE-9696:
------------------------------

I rechecked.  The MERGING znode actually has the name of the merged region so my claim above
that PENDING_MERGE having name of merging region being new is not totally correct.

> Master recovery ignores online merge znode
> ------------------------------------------
>
>                 Key: HBASE-9696
>                 URL: https://issues.apache.org/jira/browse/HBASE-9696
>             Project: HBase
>          Issue Type: Bug
>          Components: master, Region Assignment
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>             Fix For: 0.98.0, 0.96.1
>
>         Attachments: trunk-9696.patch, trunk-9696_v2.1.patch, trunk-9696_v2.patch, trunk-9696_v3.patch,
trunk-9696_v3.patch
>
>
> The online merge znode uses the new region to be created.  When master restarts, the
new region is still unknown if the merging is not completed. Therefore the znode is ignored,
which should not.  That means the two merging regions could be moved around.  This could cause
some data loss if we are not luck.



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