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https://issues.apache.org/jira/browse/HBASE-24788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bharath Vissapragada resolved HBASE-24788.
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    Resolution: Fixed

Thanks Sandeep for the fix.

> Fix the connection leaks on getting hbase admin from unclosed connection
> ------------------------------------------------------------------------
>
>                 Key: HBASE-24788
>                 URL: https://issues.apache.org/jira/browse/HBASE-24788
>             Project: HBase
>          Issue Type: Bug
>          Components: mapreduce
>    Affects Versions: 3.0.0-alpha-1, 2.3.0, 1.6.0
>            Reporter: Sandeep Pal
>            Assignee: Sandeep Pal
>            Priority: Major
>             Fix For: 3.0.0-alpha-1, 2.3.1, 1.7.0, 2.4.0, 2.2.7
>
>
> Observed the significant increase in ZK connection on performance testing on 
> map reduce jobs. Turns out the 
> [TableOutputFormat.checkOutputSpecs()|https://github.com/apache/hbase/blob/master/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableOutputFormat.java#L182]
>   is not closing the connection it uses to get the hbase admin. It closes the 
> hbase admin but never close the connection to get the admin.  



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