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From "Sanjay Dahiya (JIRA)" <j...@apache.org>
Subject [jira] Deleted: (HADOOP-541) Reduces asking for map ouput for dead tasktrackers causes NullPointerException on JobTracker
Date Mon, 18 Sep 2006 12:21:23 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-541?page=all ]

Sanjay Dahiya deleted HADOOP-541:
---------------------------------


> Reduces asking for map ouput for dead tasktrackers causes NullPointerException on JobTracker
> --------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-541
>                 URL: http://issues.apache.org/jira/browse/HADOOP-541
>             Project: Hadoop
>          Issue Type: Bug
>            Reporter: Sanjay Dahiya
>
> For dead task trackers, reduce tasks invoking locateMapOutputs(), results in NullPointerException.

>                                 if (now - newProfile.getLastSeen() > TASKTRACKER_EXPIRY_INTERVAL)
{
>                                     // Remove completely
>                                     updateTaskTrackerStatus(trackerName, null);     <------
Task tracker removed.
>             result.add(new MapOutputLocation(status.getTaskId(),
>                                               mapTasksNeeded[i],
>                                               tracker.getHost(),         <------------NullPointerException
>                                               tracker.getHttpPort()));
>  
> 2006-09-15 15:15:52,634 INFO org.apache.hadoop.ipc.Server: Server handler 6 on 50020
call error: java.io.IOException: java.lang.NullPointerException
> java.io.IOException: java.lang.NullPointerException
>         at org.apache.hadoop.mapred.JobTracker.locateMapOutputs(JobTracker.java:956)
>         at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:585)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:333)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:473)

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