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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HAMA-53) NullPointerException on mapreduce
Date Mon, 08 Sep 2008 07:58:44 GMT
NullPointerException on mapreduce
---------------------------------

                 Key: HAMA-53
                 URL: https://issues.apache.org/jira/browse/HAMA-53
             Project: Hama
          Issue Type: Bug
          Components: mapred 
            Reporter: Edward J. Yoon
            Assignee: Edward J. Yoon
             Fix For: 0.1.0


When I run a addition example on the Hadoop cluster, I recieved an NullPointerException as
below : 

08/09/08 16:35:34 INFO mapred.JobClient: Running job: job_200809081623_0004
08/09/08 16:35:35 INFO mapred.JobClient:  map 0% reduce 0%
08/09/08 16:35:39 INFO mapred.JobClient: Task Id : task_200809081623_0004_m_000000_0, Status
: FAILED
java.lang.NullPointerException
        at org.apache.hama.algebra.AdditionMap.map(AdditionMap.java:38)
        at org.apache.hama.algebra.AdditionMap.map(AdditionMap.java:31)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:219)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2124)

08/09/08 16:35:44 INFO mapred.JobClient: Task Id : task_200809081623_0004_m_000000_1, Status
: FAILED
java.lang.NullPointerException
        at org.apache.hama.algebra.AdditionMap.map(AdditionMap.java:38)
        at org.apache.hama.algebra.AdditionMap.map(AdditionMap.java:31)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:219)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2124)

08/09/08 16:35:49 INFO mapred.JobClient: Task Id : task_200809081623_0004_m_000000_2, Status
: FAILED
java.lang.NullPointerException
        at org.apache.hama.algebra.AdditionMap.map(AdditionMap.java:38)
        at org.apache.hama.algebra.AdditionMap.map(AdditionMap.java:31)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:219)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2124)

08/09/08 16:35:53 INFO mapred.JobClient:  map 100% reduce 100%
java.io.IOException: Job failed!
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1062)
        at org.apache.hama.DenseMatrix.add(DenseMatrix.java:146)
        at org.apache.hama.examples.MatrixAddition.main(MatrixAddition.java:63)
        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.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
        at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
        at org.apache.hama.examples.ExampleDriver.main(ExampleDriver.java:29)
        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.util.RunJar.main(RunJar.java:155)
        at org.apache.hadoop.mapred.JobShell.run(JobShell.java:194)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
        at org.apache.hadoop.mapred.JobShell.main(JobShell.java:220)


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