HDFS-17654. Fix bugs in TestRouterMountTable (#7137). Contributed by farmmamba.

Signed-off-by: He Xiaoqiao <hexiaoqiao@apache.org>

hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterMountTable.java

@@ -611,7 +611,6 @@ public class TestRouterMountTable {
       MountTable addEntry = MountTable.newInstance("/testdir", destMap);
       assertTrue(addMountTable(addEntry));
       nnFs0.mkdirs(new Path("/tmp/testdir"));
-      nnFs0.mkdirs(new Path("/tmp/testdir"));
       nnFs1.mkdirs(new Path("/tmp/testdir01"));
       nnFs0.mkdirs(new Path("/tmp/testdir/1"));
       nnFs1.mkdirs(new Path("/tmp/testdir01/1"));
@@ -619,7 +618,7 @@ public class TestRouterMountTable {
       assertEquals(2, ((HdfsFileStatus) finfo1[0]).getChildrenNum());
     } finally {
       nnFs0.delete(new Path("/tmp"), true);
-      nnFs0.delete(new Path("/tmp"), true);
+      nnFs1.delete(new Path("/tmp"), true);
     }
   }