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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3762) Task tracker died due to OOM
Date Tue, 15 Jul 2008 19:19:31 GMT
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
            Priority: Blocker



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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