NPE in TaskInProgress.cleanup
-----------------------------
Key: HADOOP-5136
URL: https://issues.apache.org/jira/browse/HADOOP-5136
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Affects Versions: 0.21.0
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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