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https://issues.apache.org/jira/browse/HBASE-4785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156011#comment-13156011
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Nicolas Spiegelberg commented on HBASE-4785:
--------------------------------------------
@stack : You're correct about the missing entrySet(). There was a previous
commit in 89-fb (r1181942) that I could not find a use for. I guess it's this
feature.
> Improve recovery time of HBase client when a region server dies.
> ----------------------------------------------------------------
>
> Key: HBASE-4785
> URL: https://issues.apache.org/jira/browse/HBASE-4785
> Project: HBase
> Issue Type: Improvement
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
> Priority: Minor
> Fix For: 0.94.0
>
> Attachments: HBASE-4785.patch
>
>
> When a region server dies, the HBase client waits until the RPC timesout
> before learning that it needs to check META to find the new location of the
> region. And it incurs this *timeout* cost for every region being served by
> the dead region server. Remove this overhead by clearing the entries in cache
> that have the dead region server as their values.
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