Exception thrown in Jobtracker logs, when the Scheduler configured is
FairScheduler.
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Key: MAPREDUCE-2307
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2307
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: contrib/fair-share
Affects Versions: 0.23.0
Reporter: Devaraj K
Priority: Minor
If we try to start the job tracker with fair scheduler using the default
configuration, It is giving the below exception.
{code:xml}
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)
{code}
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