Specification comments and method names

Author: yuyanlei-8130

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

@@ -2909,7 +2909,7 @@ public boolean processReport(final DatanodeID nodeID,
             + "discarded non-initial block report from {}"
             + " because namenode still in startup phase",
             strBlockReportId, fullBrLeaseId, nodeID);
-        removeLease(node);
+        removeDNLeaseIfNeeded(node);
         return !node.hasStaleStorages();
       }
 
@@ -2957,8 +2957,8 @@ public boolean processReport(final DatanodeID nodeID,
     return !node.hasStaleStorages();
   }
 
-  // Remove the lease when we have received block reports for all storages for a particular DN.
-  void removeLease(DatanodeDescriptor node) {
+  // Remove the DN lease only when we have received block reports for all storages for a particular DN.
+  void removeDNLeaseIfNeeded(DatanodeDescriptor node) {
     boolean needRemoveLease = true;
     for (DatanodeStorageInfo sInfo : node.getStorageInfos()) {
       if (sInfo.getBlockReportCount() == 0) {