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https://issues.apache.org/jira/browse/HBASE-15539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15213176#comment-15213176
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Mikhail Antonov commented on HBASE-15539:
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Besides that, there seems to be a bug still which causes excessive number of
cache location drops/lookups. I think we can mishandle how
FailedServerException is thrown/processed, or drop connection somewhere.
What kind of test are you running?
> HBase Client region location is expensive
> ------------------------------------------
>
> Key: HBASE-15539
> URL: https://issues.apache.org/jira/browse/HBASE-15539
> Project: HBase
> Issue Type: Bug
> Components: Client
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Fix For: 2.0.0
>
>
> ConnectionImplementation.locateRegion and MetaCache.getTableLocations are hot
> spots in a client.
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