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https://issues.apache.org/jira/browse/HADOOP-8986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13486296#comment-13486296
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Daryn Sharp commented on HADOOP-8986:
-------------------------------------

Looks good.  Did you investigate whether a test can be added to 
{{TestIPCServerResponder}}?  It causes partial writes which may allow you to 
check if the response is null out after the call finally completes.
                
> Server$Call object is never released after it is sent
> -----------------------------------------------------
>
>                 Key: HADOOP-8986
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8986
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 2.0.2-alpha, 0.23.4
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>            Priority: Critical
>         Attachments: HADOOP-8986.txt
>
>
> When an IPC response cannot be returned without blocking an Server$Call 
> object is attached to the SelectionKey of the write selector.  However the 
> call object is never removed from the SlectionKey. So for a connection that 
> rarely has large responses but is long lived there is a lot of data.

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