HDFS-16044. Fix getListing call getLocatedBlocks even source is a directory. Contributed by ludun.

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

@@ -274,7 +274,7 @@ public interface HdfsFileStatus
      * @return An {@link HdfsFileStatus} instance from these parameters.
      */
     public HdfsFileStatus build() {
-      if (null == locations && !isdir && null == symlink) {
+      if (null == locations && isdir && null == symlink) {
         return new HdfsNamedFileStatus(length, isdir, replication, blocksize,
             mtime, atime, permission, flags, owner, group, symlink, path,
             fileId, childrenNum, feInfo, storagePolicy, ecPolicy);

hadoop-hdfs-project/hadoop-hdfs-client/src/test/java/org/apache/hadoop/hdfs/protocol/TestHdfsFileStatus.java

@@ -0,0 +1,49 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs.protocol;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Test {@link HdfsFileStatus}.
+ */
+public class TestHdfsFileStatus {
+  private boolean createFileStatus(boolean isdir) {
+    HdfsFileStatus status = new HdfsFileStatus.Builder()
+        .isdir(isdir)
+        .build();
+
+    return status instanceof HdfsLocatedFileStatus;
+  }
+
+  @Test
+  public void testHdfsFileStatusBuild() {
+    // listing directory
+    assertFalse("Status of directory should not be " +
+            "HdfsLocatedFileStatus",
+        createFileStatus(true));
+
+    // listing file when locations is null
+    assertTrue("Status of file should be HdfsLocatedFileStatus",
+        createFileStatus(false));
+  }
+}
+