HADOOP-9886. Merging change r1516034 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1516038 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -101,6 +101,8 @@ Release 2.1.1-beta - UNRELEASED
 
     HADOOP-9879. Move the version info of zookeeper dependencies to
     hadoop-project/pom (Karthik Kambatla via Sandy Ryza)
+    
+    HADOOP-9886. Turn warning message in RetryInvocationHandler to debug (arpit)
 
   OPTIMIZATIONS
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/retry/RetryInvocationHandler.java

@@ -137,8 +137,6 @@ public class RetryInvocationHandler<T> implements RpcInvocationHandler {
             msg += ". Trying to fail over " + formatSleepMessage(action.delayMillis);
             if (LOG.isDebugEnabled()) {
               LOG.debug(msg, e);
-            } else {
-              LOG.warn(msg);
             }
           } else {
             if(LOG.isDebugEnabled()) {