HADOOP-9099. NetUtils.normalizeHostName fails on domains where UnknownHost resolves to an IP address. Contributed by Ivan Mitic.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1601479 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -183,6 +183,9 @@ Release 2.5.0 - UNRELEASED
     HADOOP-10647. String Format Exception in SwiftNativeFileSystemStore.java.
     (Gene Kim via stevel)
 
+    HADOOP-9099. NetUtils.normalizeHostName fails on domains where
+    UnknownHost resolves to an IP address. (Ivan Mitic via suresh)
+
 Release 2.4.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/TestNetUtils.java

@@ -605,7 +605,7 @@ public class TestNetUtils {
   @Test
   public void testNormalizeHostName() {	
     List<String> hosts = Arrays.asList(new String[] {"127.0.0.1",
-        "localhost", "3w.org", "UnknownHost"});
+        "localhost", "3w.org", "UnknownHost123"});
     List<String> normalizedHosts = NetUtils.normalizeHostNames(hosts);
     // when ipaddress is normalized, same address is expected in return
     assertEquals(normalizedHosts.get(0), hosts.get(0));