Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/12493#discussion_r60309791
--- Diff: R/pkg/inst/worker/worker.R ---
@@ -84,6 +84,10 @@ broadcastElap <- elapsedSecs()
# as number of partitions to create.
numPartitions <- SparkR:::readInt(inputCon)
+# If true, working for RDD
+# If false, working for DataFrame
+isDataFrame <- as.logical(SparkR:::readInt(inputCon))
--- End diff --
this might be beyond the scope of this JIRA/PR: when we have protocol
changes like this, how do we make sure the peer has matching implementation,
and then we are not misinterpreting the byte streams? Should there be some sort
of protocol version handshake?
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