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https://issues.apache.org/jira/browse/HADOOP-4062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12633325#action_12633325
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Hudson commented on HADOOP-4062:
--------------------------------

Integrated in Hadoop-trunk #611 (See 
[http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/611/])

> IPC client does not need to be synchronized on the output stream when a 
> connection is closed
> --------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-4062
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4062
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: ipc
>    Affects Versions: 0.18.0
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.19.0
>
>         Attachments: closeSync.patch, closeSync1.patch
>
>
> Currently when a connection on the client side is closed, the close method is 
> synchronized on the output stream. The synchronization is not necessary and 
> has introduced a side effect that the socket can not be closed immediately 
> when meanwhile applications are sending large requests.

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