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https://issues.apache.org/jira/browse/HBASE-9514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13767546#comment-13767546
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Jimmy Xiang commented on HBASE-9514:
------------------------------------

How about a RS is dead but master doesn't know about it yet? So I was thinking 
to control it from the root, AM#assign() method, the final place an openRegion 
request is sent out to another RS.
                
> Prevent region from assigning before log splitting is done
> ----------------------------------------------------------
>
>                 Key: HBASE-9514
>                 URL: https://issues.apache.org/jira/browse/HBASE-9514
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>
> If a region is assigned before log splitting is done by the server shutdown 
> handler, the edits belonging to this region in the hlogs of the dead server 
> will be lost.
> Generally this is not an issue if users don't assign/unassign a region from 
> hbase shell or via hbase admin. These commands are marked for experts only in 
> the hbase shell help too.  However, chaos monkey doesn't care.
> If we can prevent from assigning such regions in a bad time, it would make 
> things a little safer.

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