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https://issues.apache.org/jira/browse/ACCUMULO-4787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16364744#comment-16364744
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Adam J Shook commented on ACCUMULO-4787:
----------------------------------------

Applied to {{1.8}, cherry-picked into {{1.7}}, and merged into {{master}}.

> Numerous leaked CLOSE_WAIT threads from TabletServer
> ----------------------------------------------------
>
>                 Key: ACCUMULO-4787
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4787
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.8.1
>         Environment: * Ubuntu 14.04
> * HDFS 2.6.0 and 2.5.0 (in the middle of an upgrade cycle)
> * ZooKeeper 3.4.6
> * Accumulo 1.8.1
> * HotSpot 1.8.0_121
>            Reporter: Adam J Shook
>            Assignee: Adam J Shook
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 1.7.4, 1.9.0, 2.0.0
>
>          Time Spent: 5h 20m
>  Remaining Estimate: 0h
>
> I'm running into an issue across all environments where TabletServers are 
> occupying a large number of ports in a CLOSED_WAIT state writing to a 
> DataNode at port 50010.  I'm seeing numbers from around 12,000 to 20,000 
> ports.  In some instances, there were over 68k and it was affecting other 
> applications from getting a free port and they would fail to start (which is 
> how we found this in the first place).



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