YARN-3383. AdminService should use warn instead of info to log exception when operation fails. (Li Lu via wangda)

(cherry picked from commit 97a7277a2d696474b5c8e2d814c8291d4bde246e)

hadoop-yarn-project/CHANGES.txt

@@ -55,6 +55,9 @@ Release 2.8.0 - UNRELEASED
     YARN-3241. FairScheduler handles "invalid" queue names inconsistently. 
     (Zhihai Xu via kasha)
 
+    YARN-3383. AdminService should use "warn" instead of "info" to log exception 
+    when operation fails. (Li Lu via wangda)
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

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

@@ -699,7 +699,7 @@ public class AdminService extends CompositeService implements
 
   private YarnException logAndWrapException(Exception exception, String user,
       String argName, String msg) throws YarnException {
-    LOG.info("Exception " + msg, exception);
+    LOG.warn("Exception " + msg, exception);
     RMAuditLogger.logFailure(user, argName, "", 
         "AdminService", "Exception " + msg);
     return RPCUtil.getRemoteException(exception);