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https://issues.apache.org/jira/browse/SYSTEMML-901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Deron Eriksson resolved SYSTEMML-901.
-------------------------------------
Resolution: Fixed
Fix Version/s: SystemML 0.11
Fixed by [PR238|https://github.com/apache/incubator-systemml/pull/238].
> Improve message if MLContext not available
> ------------------------------------------
>
> Key: SYSTEMML-901
> URL: https://issues.apache.org/jira/browse/SYSTEMML-901
> Project: SystemML
> Issue Type: Improvement
> Components: APIs
> Reporter: Deron Eriksson
> Assignee: Deron Eriksson
> Fix For: SystemML 0.11
>
>
> Currently, if an MLContext object hasn't been created with the SparkContext,
> this can give rise to an error such as the following:
> {code}
> java.lang.NullPointerException
> at
> org.apache.sysml.api.mlcontext.MLContextConversionUtil.determineDataFrameDimensionsIfNeeded(MLContextConversionUtil.java:610)
> {code}
> For instance, if the MLContext object hasn't been created yet but a user does
> something such as trying to set inputs and outputs on a Script object, the
> above error occurs.
> {code}
> val LinRegCg = LinRegCgDML.in("X", X).in("y", y).out("beta_out")
> {code}
> The error message should be more informative and tell the user how to fix the
> issue.
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