YARN-3780. Should use equals when compare Resource in

RMNodeImpl#ReconnectNodeTransition. Contributed by zhihai xu.

(cherry picked from commit c7ee6c151c5771043a6de3b8a951cea13f59dd7b)

hadoop-yarn-project/CHANGES.txt

@@ -453,6 +453,9 @@ Release 2.8.0 - UNRELEASED
     YARN-3655. FairScheduler: potential livelock due to maxAMShare limitation
     and container reservation. (Zhihai Xu via kasha)
 
+    YARN-3780. Should use equals when compare Resource in RMNodeImpl#ReconnectNodeTransition.
+    (zhihai xu via devaraj)
+
 Release 2.7.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNodeImpl.java

@@ -622,7 +622,8 @@ public class RMNodeImpl implements RMNode, EventHandler<RMNodeEvent> {
         rmNode.httpPort = newNode.getHttpPort();
         rmNode.httpAddress = newNode.getHttpAddress();
         boolean isCapabilityChanged = false;
-        if (rmNode.getTotalCapability() != newNode.getTotalCapability()) {
+        if (!rmNode.getTotalCapability().equals(
+            newNode.getTotalCapability())) {
           rmNode.totalCapability = newNode.getTotalCapability();
           isCapabilityChanged = true;
         }