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Posted to common-dev@hadoop.apache.org by "Amareshwari Sriramadasu (JIRA)" <ji...@apache.org> on 2008/05/16 09:52:55 UTC

[jira] Created: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

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: Amareshwari Sriramadasu
             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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[jira] Updated: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Arun C Murthy (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy updated HADOOP-3403:
----------------------------------

    Status: Patch Available  (was: Open)

> 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
>
>         Attachments: HADOOP-3403_0_20080516.patch
>
>
> 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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[jira] Updated: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Devaraj Das (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Devaraj Das updated HADOOP-3403:
--------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

I just committed this. Thanks, Arun!

> 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
>
>         Attachments: HADOOP-3403_0_20080516.patch
>
>
> 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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[jira] Assigned: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Arun C Murthy (JIRA)" <ji...@apache.org>.
     [ 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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[jira] Updated: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Arun C Murthy (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy updated HADOOP-3403:
----------------------------------

    Attachment: HADOOP-3403_0_20080516.patch

> 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
>
>         Attachments: HADOOP-3403_0_20080516.patch
>
>
> 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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[jira] Commented: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Hadoop QA (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12597619#action_12597619 ] 

Hadoop QA commented on HADOOP-3403:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12382201/HADOOP-3403_0_20080516.patch
  against trunk revision 656939.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit warnings.

    -1 core tests.  The patch failed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2491/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2491/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2491/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2491/console

This message is automatically generated.

> 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
>
>         Attachments: HADOOP-3403_0_20080516.patch
>
>
> 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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[jira] Commented: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Hudson (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598993#action_12598993 ] 

Hudson commented on HADOOP-3403:
--------------------------------

Integrated in Hadoop-trunk #499 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/499/])

> 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
>
>         Attachments: HADOOP-3403_0_20080516.patch
>
>
> 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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[jira] Updated: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Devaraj Das (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Devaraj Das updated HADOOP-3403:
--------------------------------

    Hadoop Flags: [Reviewed]

> 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
>
>         Attachments: HADOOP-3403_0_20080516.patch
>
>
> 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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[jira] Updated: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Amareshwari Sriramadasu (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Amareshwari Sriramadasu updated HADOOP-3403:
--------------------------------------------

    Priority: Blocker  (was: Major)

> 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: Amareshwari Sriramadasu
>            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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[jira] Commented: (HADOOP-3403) Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

Posted by "Amareshwari Sriramadasu (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HADOOP-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12597877#action_12597877 ] 

Amareshwari Sriramadasu commented on HADOOP-3403:
-------------------------------------------------

+1 for the patch.

> 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
>
>         Attachments: HADOOP-3403_0_20080516.patch
>
>
> 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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