Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9197#discussion_r42699651
--- Diff: core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
---
@@ -116,6 +135,30 @@ private[netty] class NettyRpcEnv(
dispatcher.stop(endpointRef)
}
+ private def postToOutbox(address: RpcAddress, message: OutboxMessage):
Unit = {
+ val targetOutbox = {
+ val outbox = outboxes.get(address)
+ if (outbox == null) {
+ val newOutbox = new Outbox(this, address)
+ val oldOutbox = outboxes.putIfAbsent(address, newOutbox)
+ if (oldOutbox == null) {
+ newOutbox
+ } else {
+ oldOutbox
+ }
+ } else {
+ outbox
+ }
+ }
+ if (stopped.get) {
+ // It's possible that we put `targetOutbox` after stopping. So we
need to clean it.
+ outboxes.remove(address)
+ targetOutbox.stop()
--- End diff --
I assume `stop` is idempotent (haven't gotten there yet).
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