[MAPREDUCE-2307] Exception thrown in Jobtracker logs, when the Scheduler configured is FairScheduler.

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.0
• Component/s: contrib/fair-share
• Assignee: Devaraj Kavali
• Reporter: Devaraj Kavali
• Created: 08/Feb/11 14:57
• Updated: 15/Nov/11 00:49
• Resolved: 05/Apr/11 21:51

Description

If we try to start the job tracker with fair scheduler using the default configuration, It is giving the below exception.

 
2010-07-03 10:18:27,142 INFO org.apache.hadoop.ipc.Server: IPC Server handler 2 on 9001: starting
2010-07-03 10:18:27,143 INFO org.apache.hadoop.ipc.Server: IPC Server handler 3 on 9001: starting
2010-07-03 10:18:27,143 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on 9001: starting
2010-07-03 10:18:27,143 INFO org.apache.hadoop.ipc.Server: IPC Server handler 5 on 9001: starting
2010-07-03 10:18:27,143 INFO org.apache.hadoop.ipc.Server: IPC Server handler 6 on 9001: starting
2010-07-03 10:18:27,143 INFO org.apache.hadoop.ipc.Server: IPC Server handler 7 on 9001: starting
2010-07-03 10:18:27,143 INFO org.apache.hadoop.ipc.Server: IPC Server handler 8 on 9001: starting
2010-07-03 10:18:27,143 INFO org.apache.hadoop.mapred.JobTracker: Starting RUNNING
2010-07-03 10:18:27,143 INFO org.apache.hadoop.ipc.Server: IPC Server handler 9 on 9001: starting
2010-07-03 10:18:28,037 INFO org.apache.hadoop.net.NetworkTopology: Adding a new node: /default-rack/linux172.site
2010-07-03 10:18:28,090 INFO org.apache.hadoop.net.NetworkTopology: Adding a new node: /default-rack/linux177.site
2010-07-03 10:18:40,074 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:127)
at org.apache.hadoop.mapred.FairScheduler.assignTasks(FairScheduler.java:234)
at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:2785)
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$Server.call(RPC.java:513)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:984)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:980)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:978)