Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/16154#discussion_r91151520
--- Diff: core/src/main/scala/org/apache/spark/api/r/RBackendHandler.scala
---
@@ -143,12 +142,8 @@ private[r] class RBackendHandler(server: RBackend)
val cls = if (isStatic) {
Utils.classForName(objId)
} else {
- JVMObjectTracker.get(objId) match {
- case None => throw new IllegalArgumentException("Object not
found " + objId)
- case Some(o) =>
- obj = o
- o.getClass
- }
+ obj = server.jvmObjectTracker.get(JVMObjectId(objId))
--- End diff --
It is not an NullPointerException, it returns `null` instead. I thought
about wrapping it with an `Option` but I don't see corner cases for internal
use.
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