[jira] [Created] (SPARK-16785) dapply doesn't return array or raw columns

["Clark Fitzgerald (JIRA)" <ji...@apache.org>]

Clark Fitzgerald created SPARK-16785:
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             Summary: dapply doesn't return array or raw columns
                 Key: SPARK-16785
                 URL: https://issues.apache.org/jira/browse/SPARK-16785
             Project: Spark
          Issue Type: Bug
          Components: SparkR
    Affects Versions: 2.0.0
         Environment: Mac OS X
            Reporter: Clark Fitzgerald


Calling SparkR::dapplyCollect with R functions that return dataframes produces an error. This comes up when returning columns of binary data- ie. serialized fitted models. Also happens when functions return columns containing vectors.

The error message:

R computation failed with
 Error in (function (..., deparse.level = 1, make.row.names = TRUE, stringsAsFactors = default.stringsAsFactors())  :
  invalid list argument: all variables should have the same length

Reproducible example: https://github.com/clarkfitzg/phd_research/blob/master/ddR/spark/sparkR_dapplyCollect7.R

Relates to SPARK-16611



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