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https://issues.apache.org/jira/browse/HBASE-5914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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chunhui shen updated HBASE-5914:
--------------------------------

    Attachment: HBASE-5914v2.patch

@ted
In the v2 patch, I remove {code}+    if(regions.isEmpty()) return;{code},so 
quickAssign must assign successfully now.

{code}+      servers.removeAll(failedPlans.keySet());{code}
I think we needn't whether servers is empty, if it is empty, bulkPlan is null, 
and we will assign region singly.


                
> Using bulk assign regions in the process of ServerShutdownHandler
> -----------------------------------------------------------------
>
>                 Key: HBASE-5914
>                 URL: https://issues.apache.org/jira/browse/HBASE-5914
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>         Attachments: HBASE-5914.patch, HBASE-5914v2.patch
>
>
> In the process of ServerShutdownHandler, we currently assign regions singly.
> In the large cluster, one regionserver always carried many regions, this 
> action is  quite slow.
> What about using bulk assign regions like cluster start up.
> In current logic,  if we failed assigning many regions to one destination 
> server, we will wait unitl timeout, 
> however in the process of ServerShutdownHandler, we should retry it to 
> another server.

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