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https://issues.apache.org/jira/browse/MAHOUT-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13754802#comment-13754802
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Stevo Slavic commented on MAHOUT-1321:
--------------------------------------
Reproduced locally by running SequenceFilesFromMailArchivesTest and
TestSequenceFilesFromDirectory in parallel. When these two run in parallel,
there is a chance one of them will fail, at same check for existence of
"/part-m-00000". Chance of failure is even higher when the two are run in
parallel with more tests, e.g. from mahout-integration module run:
{noformat}
mvn
-Dtest=LuceneStorageConfigurationTest,LuceneSegmentInputSplitTest,LuceneSegmentInputFormatTest,SequenceFilesFromLuceneStorageDriverTest,LuceneSegmentRecordReaderTest,SequenceFilesFromMailArchivesTest,SequenceFilesFromLuceneStorageMRJobTest,SequenceFilesFromLuceneStorageTest,VectorHelperTest,CSVVectorIteratorTest,TestSequenceFilesFromDirectory
-DforkCount=8 test
{noformat}
> TestSequenceFilesFromDirectory.testSequenceFileFromDirectoryMapReduce is
> unstable
> ---------------------------------------------------------------------------------
>
> Key: MAHOUT-1321
> URL: https://issues.apache.org/jira/browse/MAHOUT-1321
> Project: Mahout
> Issue Type: Bug
> Components: Integration
> Affects Versions: 0.8
> Environment: ubuntu4 and ubuntu3 Apache Jenkins CI nodes
> Reporter: Stevo Slavic
> Assignee: Stevo Slavic
> Fix For: 0.9
>
>
> Relevant Mahout-Quality job execution #2216 build output:
> {noformat}
> [INFO] --- maven-surefire-plugin:2.15:test (default-test) @
> mahout-integration ---
> [INFO] Surefire report directory:
> /home/jenkins/jenkins-slave/workspace/Mahout-Quality/trunk/integration/target/surefire-reports
> [INFO] parallel='classes', perCoreThreadCount=false, threadCount=1,
> useUnlimitedThreads=false
> -------------------------------------------------------
> T E S T S
> -------------------------------------------------------
> -------------------------------------------------------
> T E S T S
> -------------------------------------------------------
> Running org.apache.mahout.text.LuceneStorageConfigurationTest
> Running org.apache.mahout.text.LuceneSegmentInputSplitTest
> Running org.apache.mahout.text.LuceneSegmentInputFormatTest
> Running org.apache.mahout.text.SequenceFilesFromLuceneStorageDriverTest
> Running org.apache.mahout.text.MailArchivesClusteringAnalyzerTest
> Running org.apache.mahout.text.LuceneSegmentRecordReaderTest
> Running org.apache.mahout.text.SequenceFilesFromMailArchivesTest
> Running org.apache.mahout.text.SequenceFilesFromLuceneStorageMRJobTest
> Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.153 sec -
> in org.apache.mahout.text.MailArchivesClusteringAnalyzerTest
> Running org.apache.mahout.text.SequenceFilesFromLuceneStorageTest
> Running org.apache.mahout.utils.vectors.VectorHelperTest
> Running org.apache.mahout.utils.vectors.csv.CSVVectorIteratorTest
> Running org.apache.mahout.text.TestSequenceFilesFromDirectory
> Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.04 sec - in
> org.apache.mahout.utils.vectors.VectorHelperTest
> Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.455 sec -
> in org.apache.mahout.utils.vectors.csv.CSVVectorIteratorTest
> Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.905 sec -
> in org.apache.mahout.text.LuceneStorageConfigurationTest
> Running org.apache.mahout.utils.vectors.arff.MapBackedARFFModelTest
> Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.029 sec -
> in org.apache.mahout.utils.vectors.arff.MapBackedARFFModelTest
> Running org.apache.mahout.utils.vectors.arff.DriverTest
> Running org.apache.mahout.utils.vectors.arff.ARFFVectorIterableTest
> Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.194 sec -
> in org.apache.mahout.utils.vectors.arff.ARFFVectorIterableTest
> Running org.apache.mahout.utils.vectors.arff.ARFFTypeTest
> Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.791 sec -
> in org.apache.mahout.utils.vectors.arff.DriverTest
> Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.034 sec -
> in org.apache.mahout.utils.vectors.arff.ARFFTypeTest
> Running org.apache.mahout.utils.vectors.lucene.DriverTest
> Running org.apache.mahout.utils.vectors.lucene.CachedTermInfoTest
> Running org.apache.mahout.utils.vectors.lucene.LuceneIterableTest
> Running org.apache.mahout.utils.vectors.io.VectorWriterTest
> Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.421 sec -
> in org.apache.mahout.utils.vectors.lucene.CachedTermInfoTest
> Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.161 sec -
> in org.apache.mahout.text.SequenceFilesFromMailArchivesTest
> Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.704 sec -
> in org.apache.mahout.utils.vectors.lucene.LuceneIterableTest
> Tests run: 2, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 3.302 sec <<<
> FAILURE! - in org.apache.mahout.text.TestSequenceFilesFromDirectory
> testSequenceFileFromDirectoryMapReduce(org.apache.mahout.text.TestSequenceFilesFromDirectory)
> Time elapsed: 3.133 sec <<< FAILURE!
> java.lang.AssertionError: expected:<1> but was:<0>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotEquals(Assert.java:743)
> at org.junit.Assert.assertEquals(Assert.java:118)
> at org.junit.Assert.assertEquals(Assert.java:555)
> at org.junit.Assert.assertEquals(Assert.java:542)
> at
> org.apache.mahout.text.TestSequenceFilesFromDirectory.checkMRResultFiles(TestSequenceFilesFromDirectory.java:282)
> at
> org.apache.mahout.text.TestSequenceFilesFromDirectory.testSequenceFileFromDirectoryMapReduce(TestSequenceFilesFromDirectory.java:135)
> {noformat}
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