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From "Devaraj K (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2346) JobClient's isSuccessful and isComplete API's can throw NPE in some cases
Date Thu, 19 May 2011 15:18:47 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13036249#comment-13036249
] 

Devaraj K commented on MAPREDUCE-2346:
--------------------------------------

Patch is provided for 0.20 version.

> JobClient's isSuccessful and isComplete API's can throw NPE in some cases
> -------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2346
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2346
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.20.1
>            Reporter: Bhallamudi Venkata Siva Kamesh
>            Assignee: Devaraj K
>            Priority: Minor
>             Fix For: 0.20.4
>
>         Attachments: MAPREDUCE-2346.patch
>
>
> Description:
> * Submit a job to the job tracker and let the job complete its execution through one
of the job client's submitJob APIs. 
> * Jobclient returns a handle to the job, in the form of a RunningJob object. Client can
use this object to check whether job is sucessful or whether job is completed.
> * Reduce the following property *mapred.jobtracker.retirejob.interval*.By default this
value is 1 day. I reduced it to 5 min.
> * Set the property *mapred.job.tracker.persist.jobstatus.active* to {color:blue}*false*{color}.
> * Call either isComplete or isSuccessful APIs, after *mapred.jobtracker.retirejob.interval*
time period, previously mentioned APIs throw NPE.
> Below I am attaching stack trace
> {noformat}
> java.lang.NullPointerException
> 	at org.apache.hadoop.mapred.JobClient$NetworkedJob.isSuccessful(JobClient.java:330)
> 	at com.huawei.isap.hdp.mapreduce.test.TestJobClient.testjobClientForNULL(TestJobClient.java:60)
> 	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 junit.framework.TestCase.runTest(TestCase.java:164)
> 	at junit.framework.TestCase.runBare(TestCase.java:130)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:120)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:230)
> 	at junit.framework.TestSuite.run(TestSuite.java:225)
> 	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
> 	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
> {noformat)

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