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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (MAPREDUCE-820) NPE in TT heartbeat when there is a problem resolving the network topology
Date Tue, 04 Aug 2009 03:55:15 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-820?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinod K V resolved MAPREDUCE-820.
---------------------------------

    Resolution: Duplicate

> NPE in TT heartbeat when there is a problem resolving the network topology
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-820
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-820
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>            Reporter: Ramya R
>            Priority: Minor
>
> When there is a problem while resolving the network topology (such as a non existent
topology.script.file.name), NPE is being thrown in the TT heartbeats. Below is the exception
obtained:
> {noformat}
> error: java.io.IOException: java.lang.NullPointerException
> java.io.IOException: java.lang.NullPointerException
>         at org.apache.hadoop.mapred.JobTracker.resolveAndAddToTopology(JobTracker.java:2663)
>         at org.apache.hadoop.mapred.JobTracker.addNewTracker(JobTracker.java:2645)
>         at org.apache.hadoop.mapred.JobTracker.processHeartbeat(JobTracker.java:3093)
>         at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:2836)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)
> {noformat}

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