Don't open a region we already have opened!
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Key: HBASE-4073
URL: https://issues.apache.org/jira/browse/HBASE-4073
Project: HBase
Issue Type: Bug
Reporter: stack
Priority: Critical
Fix For: 0.92.0
See this thread:
http://search-hadoop.com/?q=Errors+after+major+compaction&fc_project=HBase
In it, Eran has snippets from a log that show us being asked open a region we
already have opened.
We need to make sure that the root issue is addressed -- the races around
assignment and its timeouts -- and then after that do something like a check if
we already have region open before we queue an open (we can't return message to
the master from down inside the regionserver event handlers).
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