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https://issues.apache.org/jira/browse/MAPREDUCE-4038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Harsh J resolved MAPREDUCE-4038.
--------------------------------
Resolution: Invalid
Hi,
This JIRA is for all issues with the framework, not user code. Since
{{JobQueueTaskScheduler1}} isn't a class we provide, am marking this as Invalid.
Please send your question instead to the community mailing list at
mapreduce-u...@hadoop.apache.org - Providing source code in your mail will also
help.
> null pointer exception and invocationtarget exception in jobtracker logs
> ------------------------------------------------------------------------
>
> Key: MAPREDUCE-4038
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4038
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Affects Versions: 0.20.1
> Environment: Cluster with 10 nodes, Linux operating system
> Reporter: gan
> Priority: Critical
> Labels: hadoop
> Original Estimate: 276h
> Remaining Estimate: 276h
>
> I have written the code for scheduling in hadoop in which i have written two
> function schedule() and call() the schedule function calls the resource
> calculator for knowing the CPU usage and reliability values(explicitly i
> gave) but i am getting null pointer exception in the end. even i have written
> the code for getting active tracker names it shows null pointer exception.
> help me!
> ERROR IN JOB TRACKER LOG FILE
> 2012-03-12 14:37:01,198 INFO org.apache.hadoop.mapred.JobTracker:
> STARTUP_MSG:
> /************************************************************
> STARTUP_MSG: Starting JobTracker
> STARTUP_MSG: host = slavenode2.yahoo/192.168.1.2
> STARTUP_MSG: args = []
> STARTUP_MSG: version = 0.20.1
> STARTUP_MSG: build =
> http://svn.apache.org/repos/asf/hadoop/common/tags/release-0.20.1-rc1 -r
> 810220; compiled by 'oom' on Tue Sep 1 20:55:56 UTC 2009
> ************************************************************/
> 2012-03-12 14:37:01,451 INFO org.apache.hadoop.mapred.JobTracker: Scheduler
> configured with (memSizeForMapSlotOnJT, memSizeForReduceSlotOnJT,
> limitMaxMemForMapTasks, limitMaxMemForReduceTasks) (-1, -1, -1, -1)
> 2012-03-12 14:37:01,515 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.2 CPU usage: 0.0
> 2012-03-12 14:37:01,532 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.3 CPU usage: 0.0
> 2012-03-12 14:37:01,546 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.4 CPU usage: 0.0
> 2012-03-12 14:37:01,556 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.5 CPU usage: 0.0
> 2012-03-12 14:37:01,566 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.7 CPU usage: 0.0
> 2012-03-12 14:37:01,579 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.8 CPU usage: 0.0
> 2012-03-12 14:37:01,589 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.11 CPU usage: 0.0
> 2012-03-12 14:37:01,599 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.12 CPU usage: 0.0
> 2012-03-12 14:37:01,615 INFO org.apache.hadoop.mapred.resourcecalculator:
> 192.168.1.254 CPU usage: 0.0
> 2012-03-12 14:37:01,616 FATAL org.apache.hadoop.mapred.JobTracker:
> java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
> at
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:115)
> at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:1573)
> at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:180)
> at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:172)
> at org.apache.hadoop.mapred.JobTracker.main(JobTracker.java:3699)
> Caused by: java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> at
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:113)
> ... 4 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.mapred.JobQueueTaskScheduler1.schedule(JobQueueTaskScheduler1.java:75)
> at
> org.apache.hadoop.mapred.JobQueueTaskScheduler1.call(JobQueueTaskScheduler1.java:139)
> at
> org.apache.hadoop.mapred.JobQueueTaskScheduler1.<init>(JobQueueTaskScheduler1.java:50)
> ... 9 more
> 2012-03-12 14:37:01,617 INFO org.apache.hadoop.mapred.JobTracker:
> SHUTDOWN_MSG:
> /************************************************************
> SHUTDOWN_MSG: Shutting down JobTracker at slavenode2.yahoo/192.168.1.2
> ************************************************************/
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