svn merge -c 1176733 from trunk for HDFS-2363.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1176737 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -689,6 +689,9 @@ Release 0.23.0 - Unreleased
     HDFS-2332. Add test for HADOOP-7629 (using an immutable FsPermission
     object as an RPC parameter fails). (todd)
 
+    HDFS-2363. Move datanodes size printing from FSNamesystem.metasave(..)
+    to BlockManager.  (Uma Maheswara Rao G via szetszwo)
+
   OPTIMIZATIONS
 
     HDFS-1458. Improve checkpoint performance by avoiding unnecessary image

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java

@@ -306,6 +306,11 @@ public class BlockManager {
   /** Dump meta data to out. */
   public void metaSave(PrintWriter out) {
     assert namesystem.hasWriteLock();
+    final List<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
+    final List<DatanodeDescriptor> dead = new ArrayList<DatanodeDescriptor>();
+    datanodeManager.fetchDatanodes(live, dead, false);
+    out.println("Live Datanodes: " + live.size());
+    out.println("Dead Datanodes: " + dead.size());
     //
     // Dump contents of neededReplication
     //

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

@@ -537,11 +537,6 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
       out.println(totalInodes + " files and directories, " + totalBlocks
           + " blocks = " + (totalInodes + totalBlocks) + " total");
 
-      final List<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
-      final List<DatanodeDescriptor> dead = new ArrayList<DatanodeDescriptor>();
-      blockManager.getDatanodeManager().fetchDatanodes(live, dead, false);
-      out.println("Live Datanodes: "+live.size());
-      out.println("Dead Datanodes: "+dead.size());
       blockManager.metaSave(out);
 
       out.flush();