Github user sun-rui commented on a diff in the pull request:
https://github.com/apache/spark/pull/9290#discussion_r43224710
--- Diff: R/pkg/R/sparkR.R ---
@@ -123,16 +123,24 @@ sparkR.init <- function(
uriSep <- "////"
}
+ sparkEnvirMap <- convertNamedListToEnv(sparkEnvir)
+
existingPort <- Sys.getenv("EXISTING_SPARKR_BACKEND_PORT", "")
if (existingPort != "") {
backendPort <- existingPort
} else {
path <- tempfile(pattern = "backend_port")
+ # A few Spark config cannot be set in env:
--- End diff --
wording:
A few Spark properties can not take effect after the driver JVM has
started, as documented in
http://spark.apache.org/docs/latest/configuration.html#application-properties
In SparkR shell mode, add them to spark-submit commandline if not already
set in SPARKR_SUBMIT_ARGS so that they can take effect when launching the JVM.
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