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https://issues.apache.org/jira/browse/HIVEMALL-268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16943419#comment-16943419
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ASF GitHub Bot commented on HIVEMALL-268:
-----------------------------------------
asfgit commented on pull request #200: [HIVEMALL-268] Fix the default vInit,
eta initialization bug in FactorizationMachines
URL: https://github.com/apache/incubator-hivemall/pull/200
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> train_ffm(features,label) causes NPE while train_ffm(features,label,'') works
> fine
> ----------------------------------------------------------------------------------
>
> Key: HIVEMALL-268
> URL: https://issues.apache.org/jira/browse/HIVEMALL-268
> Project: Hivemall
> Issue Type: Bug
> Affects Versions: 0.5.2
> Reporter: Makoto Yui
> Assignee: Makoto Yui
> Priority: Critical
> Fix For: 0.6.0
>
>
> train_ffm(features,label) causes NPE while train_ffm(features,label,'') works
> fine.
> {code:java}
> Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Exception caused
> in the 1-th call of train()
> at
> hivemall.fm.FactorizationMachineUDTF.train(FactorizationMachineUDTF.java:404)
> at
> hivemall.fm.FactorizationMachineUDTF.process(FactorizationMachineUDTF.java:314)
> at
> org.apache.hadoop.hive.ql.exec.UDTFOperator.processOp(UDTFOperator.java:107)
> at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:793)
> at
> org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:87)
> at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:793)
> at
> org.apache.hadoop.hive.ql.exec.ExtractOperator.processOp(ExtractOperator.java:45)
> at
> org.apache.hadoop.hive.ql.exec.mr.ExecReducer.reduce(ExecReducer.java:262)
> ... 11 more
> Caused by: java.lang.NullPointerException
> at
> hivemall.fm.FactorizationMachineModel.initV(FactorizationMachineModel.java:391)
> at
> hivemall.fm.FFMStringFeatureMapModel.getV(FFMStringFeatureMapModel.java:152)
> at
> hivemall.fm.FieldAwareFactorizationMachineModel.predict(FieldAwareFactorizationMachineModel.java:98)
> at
> hivemall.fm.FieldAwareFactorizationMachineUDTF.trainTheta(FieldAwareFactorizationMachineUDTF.java:195)
> at
> hivemall.fm.FactorizationMachineUDTF.train(FactorizationMachineUDTF.java:401)
> ... 18 more
> {code}
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