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Date: Mon, 18 Jun 2012 14:45:42 +0000 (UTC)
From: "Thomas Graves (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-8495) Update Netty to avoid leaking file
 descriptors during shuffle
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    [ https://issues.apache.org/jira/browse/HADOOP-8495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13395926#comment-13395926 ] 

Thomas Graves commented on HADOOP-8495:
---------------------------------------

+1 lgtm.
                
> Update Netty to avoid leaking file descriptors during shuffle
> -------------------------------------------------------------
>
>                 Key: HADOOP-8495
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8495
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 0.23.3, 2.0.0-alpha, 3.0.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Critical
>         Attachments: HADOOP-8495.patch
>
>
> Netty 3.2.3.Final has a known bug where writes to a closed channel do not have their futures invoked.  See [Netty-374|https://issues.jboss.org/browse/NETTY-374].  This can lead to file descriptor leaks during shuffle as noted in MAPREDUCE-4298.

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