[jira] [Created] (SYSTEMML-1076) Sparse Max Pooling Unsupported

[Mike Dusenberry (JIRA)]

Mike Dusenberry created SYSTEMML-1076:
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             Summary: Sparse Max Pooling Unsupported
                 Key: SYSTEMML-1076
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1076
             Project: SystemML
          Issue Type: Bug
            Reporter: Mike Dusenberry


Currently, our max pooling built-in operator does not support sparse matrices.  
However, sparse matrices are a common possibility in neural nets that make use 
of ReLU and Dropout layers.  Therefore, we should accept sparse matrices as 
input.

{code}
Caused by: org.apache.sysml.runtime.DMLRuntimeException: Sparse 
maxpooling_backward is not supported
        at 
org.apache.sysml.runtime.matrix.data.LibMatrixDNN.maxpooling_backward(LibMatrixDNN.java:526)
        at 
org.apache.sysml.runtime.instructions.cp.ConvolutionCPInstruction.processInstruction(ConvolutionCPInstruction.java:205)
        at 
org.apache.sysml.runtime.controlprogram.ProgramBlock.executeSingleInstruction(ProgramBlock.java:305)
        ... 26 more
{code}



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