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From "Koji Noguchi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1761) Race condition in LaunchTaskAction and KillJobAction
Date Wed, 22 Aug 2007 20:56:30 GMT
Race condition in LaunchTaskAction and KillJobAction
----------------------------------------------------

                 Key: HADOOP-1761
                 URL: https://issues.apache.org/jira/browse/HADOOP-1761
             Project: Hadoop
          Issue Type: Bug
          Components: mapred
    Affects Versions: 0.13.1
            Reporter: Koji Noguchi
            Priority: Minor


One task wasn't killed when its job was killed. 
On the TaskTracker log, it showed, 

2007-08-21 17:02:29,219 INFO org.apache.hadoop.mapred.TaskTracker: LaunchTaskAction: task_0133_r_000080_2
   <**************
2007-08-21 17:02:29,232 INFO org.apache.hadoop.mapred.TaskTracker: Received 'KillJobAction'
for job: job_0131         <**************
2007-08-21 17:02:29,233 INFO org.apache.hadoop.mapred.TaskRunner: task_0131_m_000077_0 done;
removing files.
2007-08-21 17:02:29,376 INFO org.apache.hadoop.mapred.TaskTracker: Received 'KillJobAction'
for job: job_0133
2007-08-21 17:02:29,376 INFO org.apache.hadoop.mapred.TaskRunner: task_0133_r_000060_0 done;
removing files.
2007-08-21 17:02:29,378 INFO org.apache.hadoop.mapred.TaskRunner: task_0133_r_000071_2 done;
removing files.
2007-08-21 17:02:29,381 INFO org.apache.hadoop.mapred.TaskRunner: task_0133_r_000066_1 done;
removing files.
2007-08-21 17:02:31,272 INFO org.apache.hadoop.mapred.TaskTracker: task_0133_r_000080_2 0.0%
reduce > copy >
2007-08-21 17:02:32,275 INFO org.apache.hadoop.mapred.TaskTracker: task_0133_r_000080_2 0.0%
reduce > copy >
2007-08-21 17:02:33,277 INFO org.apache.hadoop.mapred.TaskTracker: task_0133_r_000080_2 0.0%
reduce > copy >
...
[task_0133_r_000080_2 continue to run]



Of course the JobTracker kept on complaining
2007-08-22 19:06:37,880 INFO org.apache.hadoop.mapred.JobTracker: Serious problem.  While
updating status, cannot find taskid task_0133_r_000080_2
2007-08-22 19:06:38,124 INFO org.apache.hadoop.mapred.JobTracker: Serious problem.  While
updating status, cannot find taskid task_0133_r_000080_2
2007-08-22 19:06:47,885 INFO org.apache.hadoop.mapred.JobTracker: Serious problem.  While
updating status, cannot find taskid task_0133_r_000080_2


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