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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3762) Task tracker died due to OOM
Date Fri, 22 Aug 2008 12:34:48 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12624693#action_12624693
] 

Hudson commented on HADOOP-3762:
--------------------------------

Integrated in Hadoop-trunk #581 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/581/])

> Task tracker died due to OOM 
> -----------------------------
>
>                 Key: HADOOP-3762
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3762
>             Project: Hadoop Core
>          Issue Type: Bug
>            Reporter: Runping Qi
>            Assignee: Doug Cutting
>            Priority: Blocker
>             Fix For: 0.18.0
>
>         Attachments: 3762_20080715.patch, 3762_20080715b.patch, 3762_20080715c.patch,
3762_20080717.patch, HADOOP-3762.patch, HADOOP-3762.patch, HADOOP-3762.patch, HADOOP-3762.patch,
TaskTrackerStackTrace.txt
>
>
> When running about 100 moderate jobs on a small cluster (with 19 Task Trackers),
> the task trackers all died due to OOM.
> I got a chance to dump the jstack strace of a task tracker before it died.
> Its image size was close 4GB!
> I saw 1200+ threads of DFSClient.LeaseChecker.
> Clearly we have a severe resource leakage problem!

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