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https://issues.apache.org/jira/browse/HBASE-17304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15745443#comment-15745443
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Aman Poonia commented on HBASE-17304:
-------------------------------------
[~abhishek.chouhan]
> Avoid draining region servers in draining mode while moving the regions at
> client side i.e. in region_mover.rb
> --------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-17304
> URL: https://issues.apache.org/jira/browse/HBASE-17304
> Project: HBase
> Issue Type: Improvement
> Components: Client
> Reporter: Aman Poonia
>
> While using region_mover.rb in our testing we faced an issue where
> region_mover was taking a lot of time to unload regions.
> For instance we take 10 region server and create draining znode for 8. So
> while moving the regions region_mover.rb doesn't take draining znode in
> consideration and it tries to move the region in all the region server which
> are available so it fails at the server side and then it sleeps for some
> second and retries 5 time for each region and iterates over all the region
> servers. This makes this process really slow in extreme cases as mentioned
> above where a lot of nodes in a cluster are in draining mode.
> We need to get the list of draining region servers so that we can avoid them
> while moving regions.
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