HDFS-8780. Follow up commit to add missing lines from porting to branch-2.7.

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

@@ -6972,7 +6972,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     final Map<String, Map<String,Object>> info = 
       new HashMap<String, Map<String,Object>>();
     final List<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
-    blockManager.getDatanodeManager().fetchDatanodes(live, null, true);
+    blockManager.getDatanodeManager().fetchDatanodes(live, null, false);
     for (DatanodeDescriptor node : live) {
       ImmutableMap.Builder<String, Object> innerinfo =
           ImmutableMap.<String,Object>builder();
@@ -7017,7 +7017,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     final Map<String, Map<String, Object>> info = 
       new HashMap<String, Map<String, Object>>();
     final List<DatanodeDescriptor> dead = new ArrayList<DatanodeDescriptor>();
-    blockManager.getDatanodeManager().fetchDatanodes(null, dead, true);
+    blockManager.getDatanodeManager().fetchDatanodes(null, dead, false);
     for (DatanodeDescriptor node : dead) {
       Map<String, Object> innerinfo = ImmutableMap.<String, Object>builder()
           .put("lastContact", getLastContact(node))