Github user sun-rui commented on the pull request:
https://github.com/apache/spark/pull/9185#issuecomment-155406712
@davies, I don't understand your two cases. SparkR is actually a standalone
spark application in R, the JVM backend is dedicated, won't share with other
applications.
SparkR is not a thrift client to an SparkSQL service, it won't be a
session of an SparkSQL thrift service, so it makes no sense to add a flag
about session into sparkR.init.
SparkR itself won't try to provide multi-session support (as SparkSQL
thrift server does), because R is a single-threaded environment.
so my point is that a single root SQLContext is what we want.
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