[MAPREDUCE-820] NPE in TT heartbeat when there is a problem resolving the network topology

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Component/s: jobtracker
• Assignee: Unassigned
• Reporter: Ramya Sunil
• Created: 03/Aug/09 13:29
• Updated: 04/Aug/09 03:55
• Resolved: 04/Aug/09 03:55

Description

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:

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)

Issue Links

• is duplicated by: HADOOP-10867 NPE in heartbeat when the configured topology script doesn't exist