HDFS-5661. Merge change r1552177 from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1552180 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -415,6 +415,9 @@ Release 2.3.0 - UNRELEASED
     
     HDFS-5657. race condition causes writeback state error in NFS gateway (brandonli)
 
+    HDFS-5661. Browsing FileSystem via web ui, should use datanode's fqdn instead of ip 
+    address. (Benoy Antony via jing9)
+
 Release 2.2.0 - 2013-10-13
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/JspHelper.java

@@ -118,16 +118,29 @@ public class JspHelper {
     }
   }
   
+  /**
+   * convenience method for canonicalizing host name.
+   * @param addr name:port or name 
+   * @return canonicalized host name
+   */
+   public static String canonicalize(String addr) {
+    // default port 1 is supplied to allow addr without port.
+    // the port will be ignored.
+    return NetUtils.createSocketAddr(addr, 1).getAddress()
+           .getCanonicalHostName();
+  }
+
   /**
    * A helper class that generates the correct URL for different schema.
    *
    */
   public static final class Url {
     public static String authority(String scheme, DatanodeID d) {
+      String fqdn = canonicalize(d.getIpAddr());
       if (scheme.equals("http")) {
-        return d.getInfoAddr();
+        return fqdn + ":" + d.getInfoPort();
       } else if (scheme.equals("https")) {
-        return d.getInfoSecureAddr();
+        return fqdn + ":" + d.getInfoSecurePort();
       } else {
         throw new IllegalArgumentException("Unknown scheme:" + scheme);
       }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DatanodeJspHelper.java

@@ -77,18 +77,6 @@ public class DatanodeJspHelper {
       });
   }
 
-  /**
-   * Internal convenience method for canonicalizing host name.
-   * @param addr name:port or name 
-   * @return canonicalized host name
-   */
-  private static String canonicalize(String addr) {
-    // default port 1 is supplied to allow addr without port.
-    // the port will be ignored.
-    return NetUtils.createSocketAddr(addr, 1).getAddress()
-           .getCanonicalHostName();
-  }
-
   /**
    * Get the default chunk size.
    * @param conf the configuration
@@ -228,7 +216,7 @@ public class DatanodeJspHelper {
       }
     }
     out.print("<br><a href=\"///"
-        + canonicalize(nnAddr) + ":"
+        + JspHelper.canonicalize(nnAddr) + ":"
         + namenodeInfoPort + "/dfshealth.jsp\">Go back to DFS home</a>");
     dfs.close();
   }
@@ -359,7 +347,7 @@ public class DatanodeJspHelper {
     // generate a table and dump the info
     out.println("\n<table>");
     
-    String nnCanonicalName = canonicalize(nnAddr);
+    String nnCanonicalName = JspHelper.canonicalize(nnAddr);
     for (LocatedBlock cur : blocks) {
       out.print("<tr>");
       final String blockidstring = Long.toString(cur.getBlock().getBlockId());