[MAPREDUCE-541] NullPointerException in fairshare PoolManager

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Vinod Kumar Vavilapalli
• Reporter: Nigel Daley
• Created: 04/Mar/09 04:27
• Updated: 20/Jun/09 08:01

Description

Found this NPE in a Hadoop 0.20.0 JobTracker log:

2009-03-03 23:55:22,824 ERROR org.apache.hadoop.mapred.PoolManager: Failed to reload allocations file - will use existing allocations.
java.lang.NullPointerException
        at java.io.File.<init>(File.java:222)
        at org.apache.hadoop.mapred.PoolManager.reloadAllocsIfNecessary(PoolManager.java:119)
        at org.apache.hadoop.mapred.FairScheduler.assignTasks(FairScheduler.java:226)
        at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:2340)
        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)