From 4530f4500d308c9cefbcc5990769c04bd061ad87 Mon Sep 17 00:00:00 2001
From: Weiwei Yang <wwei@apache.org>
Date: Mon, 3 Jun 2019 14:09:37 +0800
Subject: [PATCH] YARN-9507. Fix NPE in NodeManager#serviceStop on startup
 failure. Contributed by Bilwa S T.

---
 .../hadoop/yarn/server/nodemanager/NodeManager.java       | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/NodeManager.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/NodeManager.java
index 89e3b478d1e..9eff3a9213e 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/NodeManager.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/NodeManager.java
@@ -526,9 +526,11 @@ public class NodeManager extends CompositeService
       DefaultMetricsSystem.shutdown();
 
       // Cleanup ResourcePluginManager
-      ResourcePluginManager rpm = context.getResourcePluginManager();
-      if (rpm != null) {
-        rpm.cleanup();
+      if (null != context) {
+        ResourcePluginManager rpm = context.getResourcePluginManager();
+        if (rpm != null) {
+          rpm.cleanup();
+        }
       }
     } finally {
       // YARN-3641: NM's services stop get failed shouldn't block the