[jira] [Resolved] (MAHOUT-1609) NullPointerException

["Andrew Palumbo (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAHOUT-1609?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Palumbo resolved MAHOUT-1609.
------------------------------------
    Resolution: Invalid

hadoop 2.4.0 is not compatible with mahout 0.9

> NullPointerException
> --------------------
>
>                 Key: MAHOUT-1609
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1609
>             Project: Mahout
>          Issue Type: Bug
>          Components: Classification
>    Affects Versions: 0.9
>         Environment: MAC OS X 10.9.4 2.4 GHz Intel Core i5 4 GB 1600 MHz DDR3 installed with hadoop 2.4.0 and mahout 0.9 with mahout installed from $git clone git@github.com:apache/mahout.git
>            Reporter: shruti agrawal
>            Assignee: Andrew Palumbo
>             Fix For: 0.10.0
>
>
> I am trying to run random forest classifier for Lymphoma dataset with 96 instances, 4026 features, and 1 class label(ACL/non ACL). Here is one sample instance: 
> 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> I used the following command to run random forest:
> Shrutis-MacBook-Pro:2.4.0 hadoop$ ./bin/hadoop jar /usr/local/Cellar/mahout/0.9/libexec/mahout-examples-0.9-job.jar org.apache.mahout.classifier.df.tools.Describe -p /user/hadoop/LymphomaExperiment/Lymphoma96x4026.arff -f /user/hadoop/LymphomaExperiment/Lymphoma96x4026.info -d 4026 N L
> I am displaying the partial output of running this command, alongwith the error I got. 
> 14/08/18 10:57:53 INFO mapred.LocalJobRunner: 
> 14/08/18 10:57:53 INFO mapred.Task: Task:attempt_local931511699_0001_m_002004_0 is done. And is in the process of committing
> 14/08/18 10:57:53 INFO mapred.LocalJobRunner: 
> 14/08/18 10:57:53 INFO mapred.Task: Task attempt_local931511699_0001_m_002004_0 is allowed to commit now
> 14/08/18 10:57:53 INFO output.FileOutputCommitter: Saved output of task 'attempt_local931511699_0001_m_002004_0' to hdfs://localhost:9000/user/hadoop/LymphomaOUTPUT1/_temporary/0/task_local931511699_0001_m_002004
> 14/08/18 10:57:53 INFO mapred.LocalJobRunner: map
> 14/08/18 10:57:53 INFO mapred.Task: Task 'attempt_local931511699_0001_m_002004_0' done.
> 14/08/18 10:57:53 INFO mapred.LocalJobRunner: Finishing task: attempt_local931511699_0001_m_002004_0
> 14/08/18 10:57:53 INFO mapred.LocalJobRunner: map task executor complete.
> 14/08/18 10:57:53 WARN mapred.LocalJobRunner: job_local931511699_0001
> java.lang.Exception: java.lang.NullPointerException
> 	at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:462)
> 	at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:522)
> Caused by: java.lang.NullPointerException
> 	at org.apache.mahout.classifier.df.data.Dataset.getLabel(Dataset.java:183)
> 	at org.apache.mahout.classifier.df.data.Data.majorityLabel(Data.java:257)
> 	at org.apache.mahout.classifier.df.builder.DecisionTreeBuilder.build(DecisionTreeBuilder.java:154)
> 	at org.apache.mahout.classifier.df.Bagging.build(Bagging.java:57)
> 	at org.apache.mahout.classifier.df.mapreduce.partial.Step1Mapper.cleanup(Step1Mapper.java:154)
> 	at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:148)
> 	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
> 	at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:243)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at java.lang.Thread.run(Thread.java:745)
> 14/08/18 10:57:53 INFO mapreduce.Job: Job job_local931511699_0001 failed with state FAILED due to: NA
> 14/08/18 10:57:54 INFO mapreduce.Job: Counters: 20
> 	File System Counters
> 		FILE: Number of bytes read=498621928416
> 		FILE: Number of bytes written=91072830290
> 		FILE: Number of read operations=0
> 		FILE: Number of large read operations=0
> 		FILE: Number of write operations=0
> 		HDFS: Number of bytes read=10597575568
> 		HDFS: Number of bytes written=283293186
> 		HDFS: Number of read operations=8062380
> 		HDFS: Number of large read operations=0
> 		HDFS: Number of write operations=4018098
> 	Map-Reduce Framework
> 		Map input records=96
> 		Map output records=96
> 		Input split bytes=276690
> 		Spilled Records=0
> 		Failed Shuffles=0
> 		Merged Map outputs=0
> 		GC time elapsed (ms)=2595
> 		Total committed heap usage (bytes)=487032619008
> 	File Input Format Counters 
> 		Bytes Read=10139695
> 	File Output Format Counters 
> 		Bytes Written=279570
> 14/08/18 10:57:54 ERROR mapreduce.Builder: Job failed!



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