JobClient's isSuccessful and isComplete API's can throw NPE in some cases
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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
Priority: Minor
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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