Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/16330#discussion_r105545724
--- Diff: core/src/main/scala/org/apache/spark/api/r/RRDD.scala ---
@@ -127,6 +127,13 @@ private[r] object RRDD {
sparkConf.setExecutorEnv(name.toString, value.toString)
}
+ if (sparkEnvirMap.containsKey("spark.r.sql.default.derby.dir") &&
--- End diff --
well, in revisiting this I thought it would be easier to minimize the
impact by making this R only.
it would be much easier if we make the derby log going to tmp always for
all lang binding
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