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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-8797) Prevent merging regions from moving during online merge
Date Tue, 02 Jul 2013 00:23:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-8797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jimmy Xiang updated HBASE-8797:
-------------------------------

    Status: Patch Available  (was: Open)

In the attached patch, a new state MERGING is adding.  When two regions are merging to a new
one, both existing regions are moved to MERGING state so that they won't be moved by mistake.
                
> Prevent merging regions from moving during online merge
> -------------------------------------------------------
>
>                 Key: HBASE-8797
>                 URL: https://issues.apache.org/jira/browse/HBASE-8797
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>         Attachments: trunk-8797.patch
>
>
> When two regions are merged online, they are closed but master doesn't know they should
stay closed during the merge.  If master moves them by mistake, for example, load balancer
kicks in, the merge could be messed up.

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