From 07ab89e8bb3f647cef4f80f39237169a0c6a8520 Mon Sep 17 00:00:00 2001
From: Varun Saxena <varunsaxena@apache.org>
Date: Tue, 1 Nov 2016 04:19:00 +0530
Subject: [PATCH] YARN-5809. AsyncDispatcher possibly invokes multiple shutdown
 threads when handling exception (Jian He via Varun Saxena)

---
 .../main/java/org/apache/hadoop/yarn/event/AsyncDispatcher.java  | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/AsyncDispatcher.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/AsyncDispatcher.java
index df542ed24e..42a68193a7 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/AsyncDispatcher.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/AsyncDispatcher.java
@@ -195,6 +195,7 @@ protected void dispatch(Event event) {
       if (exitOnDispatchException
           && (ShutdownHookManager.get().isShutdownInProgress()) == false
           && stopped == false) {
+        stopped = true;
         Thread shutDownThread = new Thread(createShutDownThread());
         shutDownThread.setName("AsyncDispatcher ShutDown handler");
         shutDownThread.start();