fix checkstyle warning.

Author: hfutatzhanghb

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockRecoveryWorker.java

@@ -553,7 +553,7 @@ long getSafeLength(Map<Long, BlockRecord> syncBlocks) {
     private void checkLocations(int locationCount)
         throws IOException {
       if (locationCount < ecPolicy.getNumDataUnits()) {
-        throw new IOException(block + " has no enough internal blocks(current:" + locationCount +
+        throw new IOException(block + " has no enough internal blocks(current: " + locationCount +
             "), unable to start recovery. Locations=" + Arrays.asList(locs));
       }
     }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestLeaseRecoveryStriped.java

@@ -267,12 +267,12 @@ public void testSafeLength() {
    */
   @Test
   public void testLeaseRecoveryWithManyZeroLengthReplica() {
-    int cellSize = (int)1024 * 1024;
+    int curCellSize = (int)1024 * 1024;
     try {
       final FSDataOutputStream out = dfs.create(p);
       final DFSStripedOutputStream stripedOut = (DFSStripedOutputStream) out
           .getWrappedStream();
-      for (int pos = 0; pos < cellSize; pos++) {
+      for (int pos = 0; pos < curCellSize; pos++) {
         out.write(StripedFileTestUtil.getByte(pos));
       }
       for (int i = 0; i < dataBlocks + parityBlocks; i++) {