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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5761) JobTracker and TaskTracker enter infinite loop when TaskTracker reports bad taskid
Date Thu, 30 Apr 2009 18:59:30 GMT
JobTracker and TaskTracker enter infinite loop when TaskTracker reports bad taskid
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                 Key: HADOOP-5761
                 URL: https://issues.apache.org/jira/browse/HADOOP-5761
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred
            Reporter: Todd Lipcon


If the TaskTracker somehow gets into a state where it has a task in COMMIT_PENDING state that
the JobTracker does not know about, the JobTracker will throw NPEs while processing heartbeats.
Due to HADOOP-3987, this causes the JT and TT to enter an infinite heartbeat loop with no
delays, and the TT fails to make progress.

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