[jira] [Created] (SPARK-10904) select(df, c("col1", "col2")) fails

["Weiqiang Zhuang (JIRA)" <ji...@apache.org>]

Weiqiang Zhuang created SPARK-10904:
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             Summary:   select(df, c("col1", "col2")) fails
                 Key: SPARK-10904
                 URL: https://issues.apache.org/jira/browse/SPARK-10904
             Project: Spark
          Issue Type: Bug
          Components: SparkR
    Affects Versions: 1.5.0
            Reporter: Weiqiang Zhuang


The help page for 'select' gives an example of 
  select(df, c("col1", "col2"))

However, this fails with assertion:

java.lang.AssertionError: assertion failed
	at scala.Predef$.assert(Predef.scala:165)
	at org.apache.spark.api.r.SerDe$.readStringBytes(SerDe.scala:92)
	at org.apache.spark.api.r.SerDe$.readString(SerDe.scala:99)
	at org.apache.spark.api.r.SerDe$.readTypedObject(SerDe.scala:63)
	at org.apache.spark.api.r.SerDe$.readObject(SerDe.scala:52)
	at org.apache.spark.api.r.RBackendHandler$$anonfun$readArgs$1.apply(RBackendHandler.scala:182)
	at org.apache.spark.api.r.RBackendHandler$$anonfun$readArgs$1.apply(RBackendHandler.scala:181)

And then none of the functions will work with following error:
> head(df)
 Error in if (returnStatus != 0) { : argument is of length zero 



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