HDFS-3009. Remove duplicate code in DFSClient#isLocalAddress by using NetUtils. Contributed by Hari Mankude.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1293390 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -132,12 +132,15 @@ Trunk (unreleased changes)
     HDFS-2878. Fix TestBlockRecovery and move it back into main test directory.
     (todd)
 
-    HDFS-2655. BlockReaderLocal#skip performs unnecessary IO. (Brandon Li
-    via jitendra)
+    HDFS-2655. BlockReaderLocal#skip performs unnecessary IO.
+    (Brandon Li via jitendra) 
 
     HDFS-3003. Remove getHostPortString() from NameNode, replace it with
     NetUtils.getHostPortString(). (Brandon Li via atm)
 
+    HDFS-3009. Remove duplicate code in DFSClient#isLocalAddress by using 
+    NetUtils. (Hari Mankude via suresh)
+
   OPTIMIZATIONS
     HDFS-2477. Optimize computing the diff between a block report and the
     namenode state. (Tomasz Nykiel via hairong)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java

@@ -548,18 +548,9 @@ public class DFSClient implements java.io.Closeable {
       }
       return true;
     }
+    
+    boolean local = NetUtils.isLocalAddress(addr);
 
-    // Check if the address is any local or loop back
-    boolean local = addr.isAnyLocalAddress() || addr.isLoopbackAddress();
-
-    // Check if the address is defined on any interface
-    if (!local) {
-      try {
-        local = NetworkInterface.getByInetAddress(addr) != null;
-      } catch (SocketException e) {
-        local = false;
-      }
-    }
     if (LOG.isTraceEnabled()) {
       LOG.trace("Address " + targetAddr + " is local");
     }