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Posted to common-dev@hadoop.apache.org by "Sanjay Dahiya (JIRA)" <ji...@apache.org> on 2006/09/17 17:42:22 UTC
[jira] Created: (HADOOP-541) Reduces asking for map ouput for dead
tasktrackers causes NullPointerException on JobTracker
Reduces asking for map ouput for dead tasktrackers causes NullPointerException on JobTracker
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Key: HADOOP-541
URL: http://issues.apache.org/jira/browse/HADOOP-541
Project: Hadoop
Issue Type: Bug
Components: mapred
Affects Versions: 0.6.1
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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