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https://issues.apache.org/jira/browse/MAPREDUCE-425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amareshwari Sriramadasu resolved MAPREDUCE-425.
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Resolution: Duplicate
Fixed as part of HADOOP-5233
> NPE in TaskInProgress.cleanup
> -----------------------------
>
> Key: MAPREDUCE-425
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-425
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Steve Loughran
> Priority: Minor
>
> This may be something that only my code triggers; an NPE in
> TaskTracker$TaskInProgress.cleanup
> {code}
> [sf-startdaemon-debug] 09/01/28 11:41:06 [TaskLauncher for task] INFO
> mapred.TaskTracker : Error cleaning up task runner:
> java.lang.NullPointerException
> [sf-startdaemon-debug] at
> org.apache.hadoop.mapred.TaskTracker$TaskInProgress.cleanup(TaskTracker.java:2487)
> [sf-startdaemon-debug] at
> org.apache.hadoop.mapred.TaskTracker.startNewTask(TaskTracker.java:1825)
> [sf-startdaemon-debug] at
> org.apache.hadoop.mapred.TaskTracker.access$1100(TaskTracker.java:104)
> [sf-startdaemon-debug] at
> org.apache.hadoop.mapred.TaskTracker$TaskLauncher.run(TaskTracker.java:1779)
> {code}
> Looking at the code, the only source of NPE's on that line is localJobConf
> {code}
> if (localJobConf.getNumTasksToExecutePerJvm() == 1) {
> {code}
> It looks like if TaskInProgress.cleanup() ever gets called with no valid
> localJobConf, then an NPE is the result. The exception gets logged and
> discarded, but it does appear in the logs.
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