YARN-9392. Handle missing scheduler events in Opportunistic Scheduler. Contributed by Abhishek Modi.

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

@@ -414,6 +414,18 @@ public class OpportunisticContainerAllocatorAMService
       break;
     case RELEASE_CONTAINER:
       break;
+    case NODE_ATTRIBUTES_UPDATE:
+      break;
+    case KILL_RESERVED_CONTAINER:
+      break;
+    case MARK_CONTAINER_FOR_PREEMPTION:
+      break;
+    case MARK_CONTAINER_FOR_KILLABLE:
+      break;
+    case MARK_CONTAINER_FOR_NONKILLABLE:
+      break;
+    case MANAGE_QUEUE:
+      break;
     // <-- IGNORED EVENTS : END -->
     default:
       LOG.error("Unknown event arrived at" +