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From "Peter Bacsko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-7049) Testcase TestMRJobs#testJobClassloaderWithCustomClasses fails
Date Tue, 06 Feb 2018 15:06:00 GMT
Peter Bacsko created MAPREDUCE-7049:
---------------------------------------

             Summary: Testcase TestMRJobs#testJobClassloaderWithCustomClasses fails 
                 Key: MAPREDUCE-7049
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7049
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: client, test
            Reporter: Peter Bacsko
            Assignee: Peter Bacsko


The testcase TestMRJobs#testJobClassloaderWithCustomClasses fails consistently with this error:

{noformat}
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.apache.hadoop.mapreduce.v2.TestMRJobs
[ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 54.325 s <<<
FAILURE! - in org.apache.hadoop.mapreduce.v2.TestMRJobs
[ERROR] testJobClassloaderWithCustomClasses(org.apache.hadoop.mapreduce.v2.TestMRJobs)  Time
elapsed: 10.531 s  <<< FAILURE!
java.lang.AssertionError: 
Job status: Application application_1517928628935_0001 failed 2 times due to AM Container
for appattempt_1517928628935_0001_000002 exited with  exitCode: 1
Failing this attempt.Diagnostics: [2018-02-06 15:50:38.688]Exception from container-launch.
Container id: container_1517928628935_0001_02_000001
Exit code: 1

[2018-02-06 15:50:38.693]Container exited with a non-zero exit code 1. Error file: prelaunch.err.
Last 4096 bytes of prelaunch.err :
Last 4096 bytes of stderr :
log4j:WARN No appenders could be found for logger (org.apache.hadoop.mapreduce.v2.app.MRAppMaster).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.


[2018-02-06 15:50:38.694]Container exited with a non-zero exit code 1. Error file: prelaunch.err.
Last 4096 bytes of prelaunch.err :
Last 4096 bytes of stderr :
log4j:WARN No appenders could be found for logger (org.apache.hadoop.mapreduce.v2.app.MRAppMaster).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.


For more detailed output, check the application tracking page: http://ubuntu:46235/cluster/app/application_1517928628935_0001
Then click on links to logs of each attempt.
. Failing the application.
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.apache.hadoop.mapreduce.v2.TestMRJobs.testJobClassloader(TestMRJobs.java:529)
	at org.apache.hadoop.mapreduce.v2.TestMRJobs.testJobClassloaderWithCustomClasses(TestMRJobs.java:477)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
{noformat}

Today I found the offending commit with {{git bisect}} and this failure is caused by {{YARN-2185}}.

The application master fails because of the following error:

{noformat}
2018-02-05 17:15:18,530 DEBUG [main] org.apache.hadoop.util.ExitUtil: Exiting with status
1: org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
1: org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at org.apache.hadoop.util.ExitUtil.terminate(ExitUtil.java:265)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.main(MRAppMaster.java:1694)
Caused by: org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.lang.RuntimeException:
java.lang.reflect.InvocationTargetException
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$3.call(MRAppMaster.java:554)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$3.call(MRAppMaster.java:534)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.callWithJobClassLoader(MRAppMaster.java:1802)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.createOutputCommitter(MRAppMaster.java:534)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.serviceInit(MRAppMaster.java:311)
        at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$6.run(MRAppMaster.java:1760)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1965)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.initAndStartAppMaster(MRAppMaster.java:1757)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.main(MRAppMaster.java:1691)
Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:135)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$3.call(MRAppMaster.java:550)
        ... 11 more
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        ... 12 more
Caused by: java.lang.ExceptionInInitializerError: incorrect classloader used
        at org.apache.hadoop.mapreduce.v2.TestMRJobs$CustomOutputFormat.verifyClassLoader(TestMRJobs.java:551)
        at org.apache.hadoop.mapreduce.v2.TestMRJobs$CustomOutputFormat.<init>(TestMRJobs.java:535)
        ... 17 more
{noformat}

The test expects the class {{CustomOutputFormat}} to be loaded by {{ApplicationClassLoader}}.
After YARN-2185 however, the class is loaded by the system classloader. This class was supposed
to be loaded from {{job.jar}} but apparently is picked from a different place.



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