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From "Mithun Radhakrishnan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-2943) Test-failures when using local-job-runner.
Date Wed, 07 Sep 2011 11:17:12 GMT
Test-failures when using local-job-runner.
------------------------------------------

                 Key: MAPREDUCE-2943
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2943
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: distcp, mrv2
    Affects Versions: 0.24.0
            Reporter: Mithun Radhakrishnan
            Priority: Minor


Here's an example of a failure when a test attempts to run using the local-job-runner:

[ERROR] TestIntegration - Exception encountered  <java.lang.NullPointerException>java.lang.NullPointerException
    at org.apache.hadoop.mapreduce.Cluster.getStagingAreaDir(Cluster.java:263)
    at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:95)
    at org.apache.hadoop.tools.DistCp.createMetaFolderPath(DistCp.java:337)
    at org.apache.hadoop.tools.DistCp.<init>(DistCp.java:77)
    at org.apache.hadoop.tools.TestIntegration.runTest(TestIntegration.java:449)
    at org.apache.hadoop.tools.TestIntegration.caseSingleFileMissingTarget(TestIntegration.java:79)
    at org.apache.hadoop.tools.TestIntegration.testSingleFileMissingTarget(TestIntegration.java:69)
    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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    ...

This is a DistCp(v2) test, built and run using Maven. DistCp's tests depend on the following
maven artifacts:
1. hadoop-mapreduce-client-jobclient
2. hadoop-hdfs
3. hadoop-common

The failure is in spite of doing a " conf.set(MRConfig.FRAMEWORK_NAME, "local");". Vinod (KV)'s
in the loop on this. It appears that the root-cause lies in org/apache/hadoop/mapred/LocalClientProtocolProvider.class
not being available in class-path. This might have to do with MR1 not having been maven-ized,
or some such.

I haven't a clean way around this for the moment, so I'll temporarily disable this distcp-test
from running. It would be nice, however, to have maven-tests that use local-job-runner to
run through.

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