YARN-1579. ActiveRMInfoProto fields should be optional (kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1557002 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -187,6 +187,8 @@ Release 2.4.0 - UNRELEASED
 
     YARN-1568. Rename clusterid to clusterId in ActiveRMInfoProto (kasha)
 
+    YARN-1579. ActiveRMInfoProto fields should be optional (kasha)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/server/yarn_server_resourcemanager_service_protos.proto

@@ -138,6 +138,6 @@ message RMStateVersionProto {
 ///////////// RM Failover related records ////////////////////////
 //////////////////////////////////////////////////////////////////
 message ActiveRMInfoProto {
-  required string clusterId = 1;
-  required string rmId = 2;
+  optional string clusterId = 1;
+  optional string rmId = 2;
 }