Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9197#discussion_r42699555
--- Diff: core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
---
@@ -70,12 +71,30 @@ private[netty] class NettyRpcEnv(
// Because TransportClientFactory.createClient is blocking, we need to
run it in this thread pool
// to implement non-blocking send/ask.
// TODO: a non-blocking TransportClientFactory.createClient in future
- private val clientConnectionExecutor =
ThreadUtils.newDaemonCachedThreadPool(
+ private[netty] val clientConnectionExecutor =
ThreadUtils.newDaemonCachedThreadPool(
"netty-rpc-connection",
conf.getInt("spark.rpc.connect.threads", 64))
@volatile private var server: TransportServer = _
+ private val stopped = new AtomicBoolean(false)
+
+ /**
+ * A map for [[RpcAddress]] and [[Outbox]]. When we are connecting to a
remote [[RpcAddress]],
+ * we just put messages to its [[Outbox]] to implement a non-block
`send` method.
--- End diff --
nit: non-blocking
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