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https://issues.apache.org/jira/browse/SYSTEMML-1853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm resolved SYSTEMML-1853.
--------------------------------------
Resolution: Fixed
Assignee: Matthias Boehm
Fix Version/s: SystemML 1.0
> StepLinreg is failing w/ recompilation issue
> --------------------------------------------
>
> Key: SYSTEMML-1853
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1853
> Project: SystemML
> Issue Type: Bug
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 1.0
>
>
> Our step-wise LinregDS is currently failing with the following NPE on dynamic
> recompilation
> {code}
> Caused by: java.lang.NullPointerException
> at org.apache.sysml.lops.BinaryScalar.getOpcode(BinaryScalar.java:111)
> at
> org.apache.sysml.lops.BinaryScalar.getInstructions(BinaryScalar.java:87)
> at
> org.apache.sysml.lops.compile.Dag.generateControlProgramJobs(Dag.java:1406)
> at org.apache.sysml.lops.compile.Dag.doGreedyGrouping(Dag.java:1176)
> at org.apache.sysml.lops.compile.Dag.getJobs(Dag.java:270)
> at
> org.apache.sysml.hops.recompile.Recompiler.recompileHopsDag(Recompiler.java:239)
> at
> org.apache.sysml.runtime.controlprogram.ProgramBlock.execute(ProgramBlock.java:147)
> {code}
> The root cause is that some rewrite modified the input solve to a scalar,
> which causes the instruction generation of solve to fail because it is not
> defined over scalars.
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