Revert HDFS-3837. Fix DataNode.recoverBlock findbugs warning.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1376702 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -492,8 +492,6 @@ Release 2.0.1-alpha - UNRELEASED
     HDFS-3830. test_libhdfs_threaded: use forceNewInstance.
     (Colin Patrick McCabe via eli)
 
-    HDFS-3837. Fix DataNode.recoverBlock findbugs warning. (eli)
-
     HDFS-3835. Long-lived 2NN cannot perform a checkpoint if security is
     enabled and the NN restarts with outstanding delegation tokens. (atm)
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/DatanodeRegistration.java

@@ -88,4 +88,13 @@ public class DatanodeRegistration extends DatanodeID
       + ", storageInfo=" + storageInfo
       + ")";
   }
+
+  @Override
+  public boolean equals(Object to) {
+    return super.equals(to);
+  }
+  @Override
+  public int hashCode() {
+    return super.hashCode();
+  }
 }