holdenk created SPARK-21068:
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Summary: SparkR error message when passed an R object rather than
Java object could be more informative
Key: SPARK-21068
URL: https://issues.apache.org/jira/browse/SPARK-21068
Project: Spark
Issue Type: Improvement
Components: SparkR
Affects Versions: 2.2.0, 2.3.0
Reporter: holdenk
Priority: Trivial
SparkR when passed a non-Java object and expecting a Java object SparkR's
backend code has an error message which is `Error: clas(objId) == "jobj" is not
TRUE`.
See backend.R and the isInstanceOf function
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