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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5234) NPE in TaskTracker reinit action
Date Thu, 12 Feb 2009 11:53:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672956#action_12672956
] 

Amareshwari Sriramadasu commented on HADOOP-5234:
-------------------------------------------------

One of the user mails also state this exception :
{noformat}
2009-02-08 17:46:51,483 INFO org.apache.hadoop.mapred.TaskTracker:
>>> addFreeSlot : current free slots : 8
>>> 2009-02-08 17:46:51,483 INFO org.apache.hadoop.mapred.TaskTracker:
>>> Error cleaning up task runner: java.lang.NullPointerException
>>>        at
>>> org.apache.hadoop.mapred.TaskTracker$TaskInProgress.cleanup(TaskTracker.java:2298)
>>>        at
>>> org.apache.hadoop.mapred.TaskTracker.startNewTask(TaskTracker.java:1648)
>>>        at
>>> org.apache.hadoop.mapred.TaskTracker.access$1200(TaskTracker.java:102)
>>>        at
>>> org.apache.hadoop.mapred.TaskTracker$TaskLauncher.run(TaskTracker.java:1602)
>>>
>>> 2009-02-08 17:46:55,622 INFO org.apache.hadoop.mapred.TaskTracker:
{noformat}

The line points to same line TaskTracker 

> NPE in TaskTracker reinit action
> --------------------------------
>
>                 Key: HADOOP-5234
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5234
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Amareshwari Sriramadasu
>            Priority: Critical
>
> I have seen an NPE in TT reinit action.
> TT logs :
> {noformat}
> 2009-02-12 12:14:02,859 INFO org.apache.hadoop.mapred.TaskTracker: Error cleaning up
task runner: java.lang.NullPointerException
> 	at org.apache.hadoop.mapred.TaskTracker$TaskInProgress.cleanup(TaskTracker.java:2515)
> 	at org.apache.hadoop.mapred.TaskTracker$TaskInProgress.jobHasFinished(TaskTracker.java:2381)
> 	at org.apache.hadoop.mapred.TaskTracker.close(TaskTracker.java:925)
> 	at org.apache.hadoop.mapred.TaskTracker.run(TaskTracker.java:1830)
> 	at org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:2901)
> {noformat}
> corresponding code is 
> {noformat}
> 2515            if (localJobConf.getNumTasksToExecutePerJvm() == 1) {
> {noformat}

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