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https://issues.apache.org/jira/browse/HBASE-9696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13791176#comment-13791176
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Jimmy Xiang commented on HBASE-9696:
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I ran v2 + (aggressive move region enabled). There are still data loss. I saved
the log to investigate tomorrow. Now I am running v2 only (with the existing
not-aggressive region move).
> 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.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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