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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.
Date Fri, 16 May 2008 18:41:55 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun C Murthy reassigned HADOOP-3403:
-------------------------------------

    Assignee: Arun C Murthy  (was: Amareshwari Sriramadasu)

I propose we fix this first-up with a part of the patch which I've put up on HADOOP-3333 (which
is a larger patch which needs to be reimplemented/retested).

> Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.
> --------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3403
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3403
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.18.0
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Arun C Murthy
>            Priority: Blocker
>             Fix For: 0.18.0
>
>
> JobTracker's ExpireTrackers gets NullPOinterException, if a tasktracker is lost.
> JobTracker's log shows the following:
> 2008-05-16 04:48:08,170 INFO org.apache.hadoop.mapred.JobTracker: Lost tracker 'tracker_XXXXX.com:XXXXX.com/98.136.100.125:58462'
> 2008-05-16 04:48:08,170 INFO org.apache.hadoop.mapred.TaskInProgress: Error from attempt_200805160431_0001_m_000001_0:
Lost task tracker: tracker_XXXXX.com:XXXXX.com/98.136.100.125:58462
> 2008-05-16 04:48:08,171 ERROR org.apache.hadoop.mapred.JobTracker: Tracker Expiry Thread
got exception: java.lang.NullPointerException
> 	at org.apache.hadoop.mapred.JobInProgress.failedTask(JobInProgress.java:1489)
> 	at org.apache.hadoop.mapred.JobInProgress.updateTaskStatus(JobInProgress.java:537)
> 	at org.apache.hadoop.mapred.JobInProgress.failedTask(JobInProgress.java:1595)
> 	at org.apache.hadoop.mapred.JobTracker.lostTaskTracker(JobTracker.java:2079)
> 	at org.apache.hadoop.mapred.JobTracker$ExpireTrackers.run(JobTracker.java:301)
> 	at java.lang.Thread.run(Thread.java:619)

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