Github user rxin commented on a diff in the pull request: https://github.com/apache/spark/pull/12318#discussion_r59325455 --- Diff: core/src/main/scala/org/apache/spark/HttpServer.scala --- @@ -155,6 +156,7 @@ private[spark] class HttpServer( throw new ServerStateException("Server is already stopped") } else { server.stop() + Option(server.getThreadPool).collect { case x: LifeCycle => x }.foreach(_.stop()) --- End diff -- btw can you also explain as inline comment when is the threadpool LifeCycle?
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