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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2018/07/17 00:50:16 UTC

[GitHub] milandesai opened a new issue #11775: NPE in BucketingModule when providedLabel of DataBatch is not set

milandesai opened a new issue #11775: NPE in BucketingModule when providedLabel of DataBatch is not set
URL: https://github.com/apache/incubator-mxnet/issues/11775
 
 
   We create a DataBatch without setting the `providedLabel` field. We then call `BucketingModule.forward(...)` with the data batch and get a NullPointerException:
   ```
   java.lang.NullPointerException was thrown.
   java.lang.NullPointerException
   	at ml.dmlc.mxnet.DataDesc$.ListMap2Descs(IO.scala:252)
   	at ml.dmlc.mxnet.module.BucketingModule.forward(BucketingModule.scala:313)
   ```
   
   This happens because the implicit method `ListMap2Descs` tries to convert `ListMap[String, Shape]` into `IndexedSeq[DataDesc]` but fails because the former is null by default.

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