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https://issues.apache.org/jira/browse/SYSTEMML-948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15511514#comment-15511514
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Niketan Pansare commented on SYSTEMML-948:
------------------------------------------
Thanks Mike, I will look into it :)
> Convolution Null Pointer Exception
> ----------------------------------
>
> Key: SYSTEMML-948
> URL: https://issues.apache.org/jira/browse/SYSTEMML-948
> Project: SystemML
> Issue Type: Bug
> Reporter: Mike Dusenberry
>
> Recently, the backwards convolution function over filters is throwing null
> pointer exceptions **randomly**. The line in question is {{Iterator<IJV>
> iter = elem.sparseBlock.getIterator()}}. [~mboehm7] Could this be related to
> the sparse block update? cc [~niketanpansare]
> {code}
> org.apache.sysml.api.mlcontext.MLContextException: Exception when executing
> script
> at org.apache.sysml.api.mlcontext.MLContext.execute(MLContext.java:293)
> at org.apache.sysml.api.mlcontext.MLContext.execute(MLContext.java:263)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231)
> at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:381)
> at py4j.Gateway.invoke(Gateway.java:259)
> at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133)
> at py4j.commands.CallCommand.execute(CallCommand.java:79)
> at py4j.GatewayConnection.run(GatewayConnection.java:209)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.sysml.api.mlcontext.MLContextException: Exception
> occurred while executing runtime program
> at
> org.apache.sysml.api.mlcontext.ScriptExecutor.executeRuntimeProgram(ScriptExecutor.java:376)
> at
> org.apache.sysml.api.mlcontext.ScriptExecutor.execute(ScriptExecutor.java:319)
> at org.apache.sysml.api.mlcontext.MLContext.execute(MLContext.java:285)
> ... 12 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException:
> org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error in while
> program block generated from while statement block between lines 24 and 52 --
> Error evaluating while program block
> at
> org.apache.sysml.runtime.controlprogram.Program.execute(Program.java:152)
> at
> org.apache.sysml.api.mlcontext.ScriptExecutor.executeRuntimeProgram(ScriptExecutor.java:374)
> ... 14 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error
> in while program block generated from while statement block between lines 24
> and 52 -- Error evaluating while program block
> at
> org.apache.sysml.runtime.controlprogram.WhileProgramBlock.execute(WhileProgramBlock.java:181)
> at
> org.apache.sysml.runtime.controlprogram.Program.execute(Program.java:145)
> ... 15 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error
> in program block generated from statement block between lines 39 and 39 --
> Error evaluating instruction:
> CP°extfunct°./mnist_lenet.dml°train°14°8°X·MATRIX·DOUBLE°Y·MATRIX·DOUBLE°X_val·MATRIX·DOUBLE°Y_val·MATRIX·DOUBLE°C·SCALAR·DOUBLE·false°Hin·SCALAR·DOUBLE·false°Win·SCALAR·DOUBLE·false°lr·SCALAR·DOUBLE·false°mu·SCALAR·DOUBLE·false°decay·SCALAR·DOUBLE·false°lambda·SCALAR·DOUBLE·false°50·SCALAR·INT·true°1·SCALAR·INT·true°iters·SCALAR·DOUBLE·false°W1°b1°W2°b2°W3°b3°W4°b4
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.executeSingleInstruction(ProgramBlock.java:335)
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.executeInstructions(ProgramBlock.java:224)
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.execute(ProgramBlock.java:168)
> at
> org.apache.sysml.runtime.controlprogram.WhileProgramBlock.execute(WhileProgramBlock.java:169)
> ... 16 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: error executing
> function ./mnist_lenet.dml::train
> at
> org.apache.sysml.runtime.instructions.cp.FunctionCallCPInstruction.processInstruction(FunctionCallCPInstruction.java:184)
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.executeSingleInstruction(ProgramBlock.java:305)
> ... 19 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error
> in function program block generated from function statement block between
> lines 36 and 196 -- Error evaluating function program block
> at
> org.apache.sysml.runtime.controlprogram.FunctionProgramBlock.execute(FunctionProgramBlock.java:121)
> at
> org.apache.sysml.runtime.instructions.cp.FunctionCallCPInstruction.processInstruction(FunctionCallCPInstruction.java:177)
> ... 20 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error
> in for program block generated from for statement block between lines 105 and
> 195 -- Error evaluating for program block
> at
> org.apache.sysml.runtime.controlprogram.ForProgramBlock.execute(ForProgramBlock.java:162)
> at
> org.apache.sysml.runtime.controlprogram.FunctionProgramBlock.execute(FunctionProgramBlock.java:114)
> ... 21 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error
> in for program block generated from for statement block between lines 106 and
> 190 -- Error evaluating for program block
> at
> org.apache.sysml.runtime.controlprogram.ForProgramBlock.execute(ForProgramBlock.java:162)
> at
> org.apache.sysml.runtime.controlprogram.ForProgramBlock.execute(ForProgramBlock.java:150)
> ... 22 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error
> in program block generated from statement block between lines 127 and 167 --
> Error evaluating instruction:
> CP°conv2d_backward_filter°outp1·MATRIX·DOUBLE°_mVar22132·MATRIX·DOUBLE°1·SCALAR·INT·true°1·SCALAR·INT·true°1·SCALAR·INT·true°1·SCALAR·INT·true°_Var22077·SCALAR·INT·false°32·SCALAR·INT·true°128·SCALAR·INT·true°128·SCALAR·INT·true°_Var22078·SCALAR·INT·false°32·SCALAR·INT·true°3·SCALAR·INT·true°3·SCALAR·INT·true°_mVar22137·MATRIX·DOUBLE°48
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.executeSingleInstruction(ProgramBlock.java:335)
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.executeInstructions(ProgramBlock.java:224)
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.execute(ProgramBlock.java:168)
> at
> org.apache.sysml.runtime.controlprogram.ForProgramBlock.execute(ForProgramBlock.java:150)
> ... 23 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: Error while
> executing multi-threaded LoopedIm2ColConv2dBwdFilter
> at
> org.apache.sysml.runtime.matrix.data.LibMatrixDNN.runParallelConvTask(LibMatrixDNN.java:878)
> at
> org.apache.sysml.runtime.matrix.data.LibMatrixDNN.runConvTask(LibMatrixDNN.java:838)
> at
> org.apache.sysml.runtime.matrix.data.LibMatrixDNN.conv2d_backward_filter(LibMatrixDNN.java:318)
> at
> org.apache.sysml.runtime.instructions.cp.ConvolutionCPInstruction.processInstruction(ConvolutionCPInstruction.java:209)
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.executeSingleInstruction(ProgramBlock.java:305)
> ... 26 more
> Caused by: java.util.concurrent.ExecutionException:
> java.lang.NullPointerException
> at java.util.concurrent.FutureTask.report(FutureTask.java:122)
> at java.util.concurrent.FutureTask.get(FutureTask.java:192)
> at
> org.apache.sysml.runtime.matrix.data.LibMatrixDNN.runParallelConvTask(LibMatrixDNN.java:869)
> ... 30 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.sysml.runtime.matrix.data.LibMatrixDNN.elementWiseInPlaceTransposedAddition(LibMatrixDNN.java:363)
> at
> org.apache.sysml.runtime.matrix.data.LibMatrixDNN.doLoopedIm2ColConv2dBwdFilter(LibMatrixDNN.java:415)
> at
> org.apache.sysml.runtime.matrix.data.LibMatrixDNN.access$300(LibMatrixDNN.java:41)
> at
> org.apache.sysml.runtime.matrix.data.LibMatrixDNN$ConvTask.call(LibMatrixDNN.java:926)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> ... 1 more
> {code}
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