HADOOP-8609. IPC server logs a useless message when shutting down socket. Contributed by Jon Zuanich.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1363951 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -379,6 +379,9 @@ Release 2.0.0-alpha - 05-23-2012
     serializer or deserializer isn't available
     (Madhukara Phatak via harsh)
 
+    HADOOP-8609. IPC server logs a useless message when shutting down socket.
+    (Jon Zuanich via atm)
+
   BUG FIXES
 
     HADOOP-8199. Fix issues in start-all.sh and stop-all.sh (Devaraj K via umamahesh)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java

@@ -1643,7 +1643,7 @@ public abstract class Server {
       if (!channel.isOpen())
         return;
       try {socket.shutdownOutput();} catch(Exception e) {
-        LOG.warn("Ignoring socket shutdown exception");
+        LOG.debug("Ignoring socket shutdown exception", e);
       }
       if (channel.isOpen()) {
         try {channel.close();} catch(Exception e) {}