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https://issues.apache.org/jira/browse/YARN-492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13607841#comment-13607841
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Robert Joseph Evans commented on YARN-492:
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It sounds to me almost like it is log aggregation. If you launch lots of these
in a tight loop it is likely that you are still aggregating the logs from the
first few, while launching new ones very quickly. If log aggregation cannot
keep up you will run out of file descriptors. Try turning off log aggregation
and see what happens.
> Too many open files error to launch a container
> -----------------------------------------------
>
> Key: YARN-492
> URL: https://issues.apache.org/jira/browse/YARN-492
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 2.0.0-alpha
> Environment: RedHat Linux
> Reporter: Krishna Kishore Bonagiri
>
> I am running a date command with YARN's distributed shell example in a loop
> of 1000 times in this way:
> yarn jar
> /home/kbonagir/yarn/hadoop-2.0.0-alpha/share/hadoop/mapreduce/hadoop-yarn-applications-distributedshell-2.0.0-alpha.jar
> org.apache.hadoop.yarn.applications.distributedshell.Client --jar
> /home/kbonagir/yarn/hadoop-2.0.0-alpha/share/hadoop/mapreduce/hadoop-yarn-applications-distributedshell-2.0.0-alpha.jar
> --shell_command date --num_containers 2
> Around 730th time or so, I am getting an error in node manager's log saying
> that it failed to launch container because there are "Too many open files"
> and when I observe through lsof command,I find that there is one instance of
> this kind of file is left for each run of Application Master, and it kept
> growing as I am running it in loop.
> node1:44871->node1:50010
> Thanks,
> Kishore
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