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https://issues.apache.org/jira/browse/HADOOP-3701?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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he yongqiang resolved HADOOP-3701.
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Resolution: Fixed
Fix Version/s: 0.17.0
this error seems is caused by jdk 1.5's bug
:http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6215050
i replace all the occurrence of SocketSelector.open().socket() with new
Socket(). It seems work.
> Too many trash sockets and trash pipes opened
> ---------------------------------------------
>
> Key: HADOOP-3701
> URL: https://issues.apache.org/jira/browse/HADOOP-3701
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.17.0
> Environment: Linux 2.6.18-53.el5PAE #1 SMP Mon Nov 12 02:55:09 EST
> 2007 i686 i686 i386 GNU/Linux
> jdk 1.5.0
> Reporter: he yongqiang
> Fix For: 0.17.0
>
>
> We encounted too many open files exception.
> And we found the datanode server daemon has opened too many sockets and
> pipes. And more surprisingly,most of the sockets are connects to remote data
> node's 50010 port and are with state CLOSE_WAIT,such as
> tcp 1 0 ::ffff:10.61.0.161:33776 ::ffff:10.61.0.162:50010
> CLOSE_WAIT 27637/java off (0.00/0/0)
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