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https://issues.apache.org/jira/browse/HBASE-1920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12773154#action_12773154
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Jean-Daniel Cryans commented on HBASE-1920:
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I was able to manufacture the problem by using the shell to scan, kill the RS,
then scan again. I'll try to see what's the exact trace.
> Client with cached region location pointing at dead server does not recover
> ---------------------------------------------------------------------------
>
> Key: HBASE-1920
> URL: https://issues.apache.org/jira/browse/HBASE-1920
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.20.1
> Reporter: Jonathan Gray
> Priority: Critical
> Fix For: 0.20.2, 0.21.0
>
>
> Testing in HBASE-1908 uncovered an issue where I had a client that had cached
> a region location. I killed that regionserver, waited for
> recovery/reassignment, and then tried to scan the table again from the same
> client w/o restarting it.
> A client normally gets a NotServingRegionException when a region is
> reassigned, but since this server is dead the client just got Connection
> Refused type exceptions. These didn't seem to trigger the client to ask META
> for a new region location.
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