HDFS-16866. Fix a typo in Dispatcher (#5202)

Signed-off-by: Tao Li <tomscut@apache.org>

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java

@@ -708,12 +708,12 @@ public class Balancer {
 
   Result newResult(ExitStatus exitStatus, long bytesLeftToMove, long bytesBeingMoved) {
     return new Result(exitStatus, bytesLeftToMove, bytesBeingMoved,
-        dispatcher.getBytesMoved(), dispatcher.getBblocksMoved());
+        dispatcher.getBytesMoved(), dispatcher.getBlocksMoved());
   }
 
   Result newResult(ExitStatus exitStatus) {
     return new Result(exitStatus, -1, -1, dispatcher.getBytesMoved(),
-        dispatcher.getBblocksMoved());
+        dispatcher.getBlocksMoved());
   }
 
   /** Run an iteration for all datanodes. */

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java

@@ -164,7 +164,7 @@ public class Dispatcher {
       }
     }
 
-    /** Aloocate a single lot of items */
+    /** Allocate a single lot of items. */
     int allocate() {
       return allocate(lotSize);
     }
@@ -1127,7 +1127,7 @@ public class Dispatcher {
     return nnc.getBytesMoved().get();
   }
 
-  long getBblocksMoved() {
+  long getBlocksMoved() {
     return nnc.getBlocksMoved().get();
   }
 
@@ -1234,7 +1234,7 @@ public class Dispatcher {
    */
   private long dispatchBlockMoves() throws InterruptedException {
     final long bytesLastMoved = getBytesMoved();
-    final long blocksLastMoved = getBblocksMoved();
+    final long blocksLastMoved = getBlocksMoved();
     final Future<?>[] futures = new Future<?>[sources.size()];
 
     int concurrentThreads = Math.min(sources.size(),
@@ -1284,7 +1284,7 @@ public class Dispatcher {
     waitForMoveCompletion(targets);
     LOG.info("Total bytes (blocks) moved in this iteration {} ({})",
         StringUtils.byteDesc(getBytesMoved() - bytesLastMoved),
-        (getBblocksMoved() - blocksLastMoved));
+        (getBlocksMoved() - blocksLastMoved));
 
     return getBytesMoved() - bytesLastMoved;
   }