myui commented on issue #198: [WIP][HIVEMALL-245] Refactor RandomForest for Sparse Data handling URL: https://github.com/apache/incubator-hivemall/pull/198#issuecomment-527582440 ``` ed by: org.apache.hadoop.hive.ql.metadata.HiveException: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: GC overhead limit exceeded at hivemall.smile.classification.RandomForestClassifierUDTF.train(RandomForestClassifierUDTF.java:415) at hivemall.smile.classification.RandomForestClassifierUDTF.close(RandomForestClassifierUDTF.java:353) at org.apache.hadoop.hive.ql.exec.UDTFOperator.closeOp(UDTFOperator.java:152) at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:697) at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711) at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711) at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711) at org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.close(MapRecordProcessor.java:464) ... 15 more Caused by: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: GC overhead limit exceeded at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at hivemall.smile.utils.SmileTaskExecutor.run(SmileTaskExecutor.java:81) at hivemall.smile.classification.RandomForestClassifierUDTF.train(RandomForestClassifierUDTF.java:413) ... 22 more Caused by: java.lang.OutOfMemoryError: GC overhead limit exceeded at hivemall.utils.collections.arrays.SparseIntArray.forEach(SparseIntArray.java:286) at hivemall.smile.classification.DecisionTree.partitionArray(DecisionTree.java:1028) at hivemall.smile.classification.DecisionTree.access$1700(DecisionTree.java:119) at hivemall.smile.classification.DecisionTree$TrainNode$4.accept(DecisionTree.java:997) at hivemall.smile.utils.VariableOrder.eachRow(VariableOrder.java:41) at hivemall.smile.classification.DecisionTree$TrainNode.partitionOrder(DecisionTree.java:994) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:896) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) at hivemall.smile.classification.DecisionTree$TrainNode.split(DecisionTree.java:924) ```
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