Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/18290#discussion_r121888174
--- Diff: core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
---
@@ -742,6 +742,17 @@ private[deploy] object Worker extends Logging {
val args = new WorkerArguments(argStrings, conf)
val rpcEnv = startRpcEnvAndEndpoint(args.host, args.port,
args.webUiPort, args.cores,
args.memory, args.masters, args.workDir, conf = conf)
+ // With external shuffle service enabled, if we request to launch
multiple workers on one host,
+ // we can only successfully launch the first worker and the rest
fails, because with the port
+ // bounded, we may launch no more than one external shuffle service on
each host.
--- End diff --
"bound"?
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