Github user sun-rui commented on a diff in the pull request:
https://github.com/apache/spark/pull/9390#discussion_r44204429
--- Diff: core/src/main/scala/org/apache/spark/api/r/RUtils.scala ---
@@ -23,6 +23,10 @@ import java.util.Arrays
import org.apache.spark.{SparkEnv, SparkException}
private[spark] object RUtils {
+ // Local path where R binary packages built from R source code contained
in the spark
+ // packages specified with "--packages" or "--jars" command line option
reside.
+ var rPackages: Option[String] = None
--- End diff --
This path is set only on localhost, won't change ever. This path is similar
and a companion one to the local SparkR package path (<SPARK_HOME>/R/lib), will
only be retrieved when running SparkR in client modes.
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