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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 19:04:43 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792959#comment-13792959
] 

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

3.2 have any other of the feedback from RB?

On commit, make these two match:

+   * RS_ZK_REGION_PENDING_MERGE<br>
+   *
+   * RS has requested to merge two regions. This is to notify master
+   * and check with master if two regions is in states good to merge.
+   */
+  RS_ZK_REQUEST_REGION_MERGE    (11, null),



> 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: 0.96-9696_v3.2.patch, trunk-9696.patch, trunk-9696_v2.1.patch, trunk-9696_v2.patch,
trunk-9696_v3.1.patch, trunk-9696_v3.2.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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