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From helenahm <...@git.apache.org>
Subject [GitHub] incubator-hivemall issue #82: Encoding related bug in LDA.
Date Fri, 02 Jun 2017 07:35:03 GMT
Github user helenahm commented on the issue:

    https://github.com/apache/incubator-hivemall/pull/82
  
    Also, in my query (below), I had to add ln != null, to not submit empty text, otherwise
an error (below below) is thrown
    
    create temporary function train_lda as 'hivemall.topicmodel.LDAUDTF';
    with word_counts as (
      select
        cast(rownum as int) as docid,
        feature(word, count(word)) as word_count
      from data_rownum t1 LATERAL VIEW explode(tokenize(ln, true)) t2 as word
      where
        not is_stopword(word) and ln != ""  
        group by
        rownum, word
    )
    select
      label, word, avg(lambda) as lambda
    from (
      select
        train_lda(feature, "-topics 2 -iter 20") as (label, word, lambda)
      from (
        select docid, collect_set(word_count) as feature
        from word_counts
        group by docid
      ) t1
    ) t2
    group by label, word
    order by lambda desc
    ;
    
    
    Diagnostic Messages for this Task:
    Error: java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: Hive
Runtime Error while processing row {"rownum":"179","ln":null}
            at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:169)
            at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
            at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:455)
            at org.apache.hadoop.mapred.MapTask.run(MapTask.java:344)
            at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
            at java.security.AccessController.doPrivileged(Native Method)
            at javax.security.auth.Subject.doAs(Subject.java:422)
            at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)
            at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
    Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while
processing row {"rownum":"179","ln":null}
            at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:499)
            at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:160)
            ... 8 more
    Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to execute method
public java.util.List hivemall.tools.text.TokenizeUDF.evaluate(org.apache.hadoop.io.Text,boolean)
 on object hivemall.tools.text.TokenizeUDF@6240651f of class hivemall.tools.text.TokenizeUDF
with arguments {null, true:java.lang.Boolean} of size 2
            at org.apache.hadoop.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:991)
            at org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge.evaluate(GenericUDFBridge.java:194)
            at org.apache.hadoop.hive.ql.exec.ExprNodeGenericFuncEvaluator._evaluate(ExprNodeGenericFuncEvaluator.java:186)
            at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:77)
            at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:65)
            at org.apache.hadoop.hive.ql.exec.SelectOperator.process(SelectOperator.java:88)
            at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:879)
            at org.apache.hadoop.hive.ql.exec.LateralViewForwardOperator.process(LateralViewForwardOperator.java:39)
            at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:879)
            at org.apache.hadoop.hive.ql.exec.FilterOperator.process(FilterOperator.java:126)
            at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:879)
            at org.apache.hadoop.hive.ql.exec.TableScanOperator.process(TableScanOperator.java:130)
            at org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.forward(MapOperator.java:149)
            at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:489)
            ... 9 more
    Caused by: java.lang.reflect.InvocationTargetException
            at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
            at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
            at java.lang.reflect.Method.invoke(Method.java:498)
            at org.apache.hadoop.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:967)
            ... 22 more
    Caused by: java.lang.NullPointerException
            at hivemall.tools.text.TokenizeUDF.evaluate(TokenizeUDF.java:42)
            ... 26 more



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