HDFS-13747. Statistic for list_located_status is incremented incorrectly by listStatusIterator. Contributed by Antal Mihalyi.

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java

@@ -1217,7 +1217,11 @@ public class DistributedFileSystem extends FileSystem
       thisListing = dfs.listPaths(src, HdfsFileStatus.EMPTY_NAME,
           needLocation);
       statistics.incrementReadOps(1);
-      storageStatistics.incrementOpCounter(OpType.LIST_LOCATED_STATUS);
+      if (needLocation) {
+        storageStatistics.incrementOpCounter(OpType.LIST_LOCATED_STATUS);
+      } else {
+        storageStatistics.incrementOpCounter(OpType.LIST_STATUS);
+      }
       if (thisListing == null) { // the directory does not exist
         throw new FileNotFoundException("File " + p + " does not exist.");
       }

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

@@ -706,6 +706,7 @@ public class TestDistributedFileSystem {
       // Iterative ls test
       long mkdirOp = getOpStatistics(OpType.MKDIRS);
       long listStatusOp = getOpStatistics(OpType.LIST_STATUS);
+      long locatedListStatusOP = getOpStatistics(OpType.LIST_LOCATED_STATUS);
       for (int i = 0; i < 10; i++) {
         Path p = new Path(dir, Integer.toString(i));
         fs.mkdirs(p);
@@ -729,6 +730,12 @@ public class TestDistributedFileSystem {
         checkStatistics(fs, readOps, ++writeOps, largeReadOps);
         checkOpStatistics(OpType.MKDIRS, mkdirOp);
         checkOpStatistics(OpType.LIST_STATUS, listStatusOp);
+
+        fs.listLocatedStatus(dir);
+        locatedListStatusOP++;
+        readOps++;
+        checkStatistics(fs, readOps, writeOps, largeReadOps);
+        checkOpStatistics(OpType.LIST_LOCATED_STATUS, locatedListStatusOP);
       }
       
       opCount = getOpStatistics(OpType.GET_STATUS);