Minor Description
From time to time this test fails with following in build log:
Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 48.134 sec <<< FAILURE! - in org.apache.mahout.clustering.streaming.cluster.BallKMeansTest testClustering(org.apache.mahout.clustering.streaming.cluster.BallKMeansTest) Time elapsed: 2.051 sec <<< FAILURE! java.lang.AssertionError: expected:<625.0> but was:<796.0> at org.junit.Assert.fail(Assert.java:88) at org.junit.Assert.failNotEquals(Assert.java:743) at org.junit.Assert.assertEquals(Assert.java:494) at org.junit.Assert.assertEquals(Assert.java:592) at org.apache.mahout.clustering.streaming.cluster.BallKMeansTest.testClustering(BallKMeansTest.java:119)
Here is a bit more of build log output, which also shows other tests were running in parallel with this one:
[INFO] --- maven-surefire-plugin:2.15:test (default-test) @ mahout-core --- [INFO] Surefire report directory: /home/jenkins/jenkins-slave/workspace/Mahout-Quality/trunk/core/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.common.distance.TestChebyshevMeasure Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.043 sec - in org.apache.mahout.common.distance.TestChebyshevMeasure Running org.apache.mahout.common.distance.TestMinkowskiMeasure Running org.apache.mahout.common.distance.TestMahalanobisDistanceMeasure Running org.apache.mahout.common.distance.TestManhattanDistanceMeasure Running org.apache.mahout.common.distance.CosineDistanceMeasureTest Running org.apache.mahout.common.distance.TestTanimotoDistanceMeasure Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.143 sec - in org.apache.mahout.common.distance.TestMinkowskiMeasure Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.078 sec - in org.apache.mahout.common.distance.TestMahalanobisDistanceMeasure Running org.apache.mahout.common.distance.TestWeightedManhattanDistanceMeasure Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.099 sec - in org.apache.mahout.common.distance.TestManhattanDistanceMeasure Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.075 sec - in org.apache.mahout.common.distance.CosineDistanceMeasureTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.094 sec - in org.apache.mahout.common.distance.TestTanimotoDistanceMeasure Running org.apache.mahout.common.distance.TestWeightedEuclideanDistanceMeasureTest Running org.apache.mahout.common.distance.TestEuclideanDistanceMeasure Running org.apache.mahout.common.iterator.TestFixedSizeSampler Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.135 sec - in org.apache.mahout.common.distance.TestWeightedManhattanDistanceMeasure Running org.apache.mahout.common.iterator.CountingIteratorTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.009 sec - in org.apache.mahout.common.iterator.CountingIteratorTest Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.073 sec - in org.apache.mahout.common.iterator.TestFixedSizeSampler Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.111 sec - in org.apache.mahout.common.distance.TestWeightedEuclideanDistanceMeasureTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.121 sec - in org.apache.mahout.common.distance.TestEuclideanDistanceMeasure Running org.apache.mahout.common.iterator.TestSamplingIterator Running org.apache.mahout.common.iterator.TestStableFixedSizeSampler Running org.apache.mahout.common.DummyRecordWriterTest Running org.apache.mahout.common.StringUtilsTest Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.093 sec - in org.apache.mahout.common.iterator.TestStableFixedSizeSampler Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.113 sec - in org.apache.mahout.common.DummyRecordWriterTest Running org.apache.mahout.common.AbstractJobTest Running org.apache.mahout.common.IntPairWritableTest Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.02 sec - in org.apache.mahout.common.IntPairWritableTest Running org.apache.mahout.common.lucene.AnalyzerUtilsTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.07 sec - in org.apache.mahout.common.lucene.AnalyzerUtilsTest Running org.apache.mahout.clustering.topdown.PathDirectoryTest Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.007 sec - in org.apache.mahout.clustering.topdown.PathDirectoryTest Running org.apache.mahout.clustering.topdown.postprocessor.ClusterCountReaderTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.505 sec - in org.apache.mahout.common.StringUtilsTest Running org.apache.mahout.clustering.classify.ClusterClassificationDriverTest Running org.apache.mahout.clustering.topdown.postprocessor.ClusterOutputPostProcessorTest Running org.apache.mahout.clustering.spectral.TestVectorCache Running org.apache.mahout.clustering.spectral.TestVectorMatrixMultiplicationJob Running org.apache.mahout.clustering.spectral.TestMatrixDiagonalizeJob Running org.apache.mahout.clustering.lda.cvb.TestCVBModelTrainer Running org.apache.mahout.clustering.spectral.TestAffinityMatrixInputJob Running org.apache.mahout.clustering.spectral.TestUnitVectorizerJob Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.356 sec - in org.apache.mahout.common.AbstractJobTest Running org.apache.mahout.clustering.canopy.TestCanopyCreation Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.046 sec - in org.apache.mahout.clustering.spectral.TestVectorMatrixMultiplicationJob Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.288 sec - in org.apache.mahout.clustering.spectral.TestMatrixDiagonalizeJob Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.624 sec - in org.apache.mahout.clustering.spectral.TestVectorCache Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.713 sec - in org.apache.mahout.common.iterator.TestSamplingIterator Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.054 sec - in org.apache.mahout.clustering.spectral.TestUnitVectorizerJob Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.518 sec - in org.apache.mahout.clustering.spectral.TestAffinityMatrixInputJob Running org.apache.mahout.clustering.kmeans.TestRandomSeedGenerator Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.609 sec - in org.apache.mahout.clustering.topdown.postprocessor.ClusterCountReaderTest Running org.apache.mahout.clustering.kmeans.TestEigenSeedGenerator Running org.apache.mahout.clustering.kmeans.TestKmeansClustering Running org.apache.mahout.clustering.TestGaussianAccumulators Running org.apache.mahout.clustering.iterator.TestClusterClassifier Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.065 sec - in org.apache.mahout.clustering.topdown.postprocessor.ClusterOutputPostProcessorTest Running org.apache.mahout.clustering.fuzzykmeans.TestFuzzyKmeansClustering Running org.apache.mahout.clustering.TestClusterInterface Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.203 sec - in org.apache.mahout.clustering.TestClusterInterface Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.746 sec - in org.apache.mahout.clustering.kmeans.TestEigenSeedGenerator Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.897 sec - in org.apache.mahout.clustering.kmeans.TestRandomSeedGenerator Running org.apache.mahout.clustering.streaming.cluster.StreamingKMeansTest Running org.apache.mahout.clustering.streaming.cluster.BallKMeansTest Running org.apache.mahout.math.stats.OnlineAucTest Running org.apache.mahout.math.stats.SamplerTest Running org.apache.mahout.math.VarintTest Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.031 sec - in org.apache.mahout.math.VarintTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.294 sec - in org.apache.mahout.math.stats.SamplerTest Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 5.821 sec - in org.apache.mahout.clustering.classify.ClusterClassificationDriverTest Running org.apache.mahout.math.hadoop.stochasticsvd.SSVDCommonTest Running org.apache.mahout.math.hadoop.stats.BasicStatsTest Running org.apache.mahout.math.hadoop.TestDistributedRowMatrix Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.175 sec - in org.apache.mahout.math.hadoop.stochasticsvd.SSVDCommonTest Running org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDPCASparseTest Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 6.366 sec - in org.apache.mahout.clustering.TestGaussianAccumulators Running org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDSolverSparseSequentialTest Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 5.578 sec - in org.apache.mahout.math.stats.OnlineAucTest Tests run: 12, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 7.893 sec - in org.apache.mahout.clustering.iterator.TestClusterClassifier Running org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDSolverDenseTest Running org.apache.mahout.math.hadoop.solver.TestDistributedConjugateGradientSolverCLI Tests run: 17, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 15.419 sec - in org.apache.mahout.clustering.canopy.TestCanopyCreation Running org.apache.mahout.math.hadoop.solver.TestDistributedConjugateGradientSolver Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 13.33 sec - in org.apache.mahout.math.hadoop.stats.BasicStatsTest Running org.apache.mahout.math.hadoop.similarity.TestVectorDistanceSimilarityJob Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 20.475 sec - in org.apache.mahout.clustering.kmeans.TestKmeansClustering Running org.apache.mahout.math.hadoop.similarity.cooccurrence.measures.VectorSimilarityMeasuresTest Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.076 sec - in org.apache.mahout.math.hadoop.similarity.cooccurrence.measures.VectorSimilarityMeasuresTest Running org.apache.mahout.math.hadoop.similarity.cooccurrence.RowSimilarityJobTest Tests run: 11, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 17.855 sec - in org.apache.mahout.math.hadoop.TestDistributedRowMatrix Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 4.63 sec - in org.apache.mahout.math.hadoop.similarity.TestVectorDistanceSimilarityJob Running org.apache.mahout.math.hadoop.decomposer.TestDistributedLanczosSolverCLI Running org.apache.mahout.math.VectorWritableTest Tests run: 100, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.046 sec - in org.apache.mahout.math.VectorWritableTest Running org.apache.mahout.math.ssvd.SequentialOutOfCoreSvdTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 16.541 sec - in org.apache.mahout.math.hadoop.solver.TestDistributedConjugateGradientSolverCLI Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 16.658 sec - in org.apache.mahout.math.hadoop.solver.TestDistributedConjugateGradientSolver Running org.apache.mahout.math.neighborhood.LocalitySensitiveHashSearchTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 25.045 sec - in org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDSolverSparseSequentialTest Running org.apache.mahout.math.neighborhood.SearchSanityTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 33.918 sec - in org.apache.mahout.clustering.fuzzykmeans.TestFuzzyKmeansClustering Running org.apache.mahout.math.MatrixWritableTest Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 13.944 sec - in org.apache.mahout.math.hadoop.similarity.cooccurrence.RowSimilarityJobTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.08 sec - in org.apache.mahout.math.MatrixWritableTest Running org.apache.mahout.vectorizer.DocumentProcessorTest Running org.apache.mahout.vectorizer.HighDFWordsPrunerTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.631 sec - in org.apache.mahout.vectorizer.HighDFWordsPrunerTest Running org.apache.mahout.math.neighborhood.SearchQualityTest Running org.apache.mahout.vectorizer.encoders.ContinuousValueEncoderTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.062 sec - in org.apache.mahout.vectorizer.encoders.ContinuousValueEncoderTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.581 sec - in org.apache.mahout.vectorizer.DocumentProcessorTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 34.304 sec - in org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDPCASparseTest Running org.apache.mahout.vectorizer.encoders.ConstantValueEncoderTest Running org.apache.mahout.vectorizer.encoders.InteractionValueEncoderTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.113 sec - in org.apache.mahout.vectorizer.encoders.ConstantValueEncoderTest Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.137 sec - in org.apache.mahout.vectorizer.encoders.InteractionValueEncoderTest Running org.apache.mahout.vectorizer.encoders.WordLikeValueEncoderTest Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.174 sec - in org.apache.mahout.vectorizer.encoders.WordLikeValueEncoderTest Running org.apache.mahout.vectorizer.encoders.TextValueEncoderTest Running org.apache.mahout.vectorizer.SparseVectorsFromSequenceFilesTest Running org.apache.mahout.vectorizer.collocations.llr.GramTest Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.082 sec - in org.apache.mahout.vectorizer.collocations.llr.GramTest Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.544 sec - in org.apache.mahout.vectorizer.encoders.TextValueEncoderTest Running org.apache.mahout.vectorizer.collocations.llr.GramKeyGroupComparatorTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.069 sec - in org.apache.mahout.vectorizer.collocations.llr.GramKeyGroupComparatorTest Running org.apache.mahout.vectorizer.collocations.llr.GramKeyPartitionerTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.061 sec - in org.apache.mahout.vectorizer.collocations.llr.GramKeyPartitionerTest Running org.apache.mahout.vectorizer.collocations.llr.LLRReducerTest Running org.apache.mahout.vectorizer.collocations.llr.CollocReducerTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.552 sec - in org.apache.mahout.vectorizer.collocations.llr.LLRReducerTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.369 sec - in org.apache.mahout.vectorizer.collocations.llr.CollocReducerTest Running org.apache.mahout.vectorizer.collocations.llr.CollocMapperTest Running org.apache.mahout.vectorizer.collocations.llr.GramKeyTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.081 sec - in org.apache.mahout.vectorizer.collocations.llr.GramKeyTest Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.693 sec - in org.apache.mahout.vectorizer.collocations.llr.CollocMapperTest Running org.apache.mahout.vectorizer.DictionaryVectorizerTest Running org.apache.mahout.vectorizer.EncodedVectorsFromSequenceFilesTest Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 48.134 sec <<< FAILURE! - in org.apache.mahout.clustering.streaming.cluster.BallKMeansTest testClustering(org.apache.mahout.clustering.streaming.cluster.BallKMeansTest) Time elapsed: 2.051 sec <<< FAILURE! java.lang.AssertionError: expected:<625.0> but was:<796.0> at org.junit.Assert.fail(Assert.java:88) at org.junit.Assert.failNotEquals(Assert.java:743) at org.junit.Assert.assertEquals(Assert.java:494) at org.junit.Assert.assertEquals(Assert.java:592) at org.apache.mahout.clustering.streaming.cluster.BallKMeansTest.testClustering(BallKMeansTest.java:119)
Last time test failed it was on ubuntu-1 node, but it's also randomly successful on same node so it doesn't seem to be caused by something node specific.