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https://issues.apache.org/jira/browse/HBASE-1621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13099091#comment-13099091
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Jean-Daniel Cryans commented on HBASE-1621:
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bq. I think that you need to test the two break conditions in an if block, and
then turn the balancer back on before you call die.
True, also it needs to handle the case where the balancer was already switched
off and shouldn't be turned back on at the end.
> merge tool should work on online cluster, but disabled table
> ------------------------------------------------------------
>
> Key: HBASE-1621
> URL: https://issues.apache.org/jira/browse/HBASE-1621
> Project: HBase
> Issue Type: Bug
> Reporter: ryan rawson
> Assignee: stack
> Priority: Blocker
> Fix For: 0.92.0
>
> Attachments: 1621-trunk.txt, HBASE-1621-v2.patch, HBASE-1621.patch,
> hbase-onlinemerge.patch, online_merge.rb
>
>
> taking down the entire cluster to merge 2 regions is a pain, i dont see why
> the table or regions specifically couldnt be taken offline, then merged then
> brought back up.
> this might need a new API to the regionservers so they can take direction
> from not just the master.
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