myui commented on pull request #229:
URL:
https://github.com/apache/incubator-hivemall/pull/229#issuecomment-638563378
```
Caused by: java.lang.NullPointerException
at
hivemall.tools.matrix.TransposeAndDotUDAF$TransposeAndDotUDAFEvaluator.terminate(TransposeAndDotUDAF.java:235)
at
hivemall.tools.matrix.TransposeAndDotUDAF$TransposeAndDotUDAFEvaluator.terminatePartial(TransposeAndDotUDAF.java:226)
at
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.evaluate(GenericUDAFEvaluator.java:208)
at
org.apache.hadoop.hive.ql.exec.GroupByOperator.forward(GroupByOperator.java:1044)
```
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