From 5e5b8793fba8e25aeba7a74878da4cf8e806f061 Mon Sep 17 00:00:00 2001
From: Kihwal Lee <kihwal@apache.org>
Date: Tue, 2 Aug 2016 15:37:36 -0500
Subject: [PATCH] HDFS-5805. TestCheckpoint.testCheckpoint fails intermittently
 on branch-2. Contributed by Eric Badger.

---
 .../apache/hadoop/hdfs/server/namenode/TestCheckpoint.java | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCheckpoint.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCheckpoint.java
index 7c9df299e9c..e643d210057 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCheckpoint.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCheckpoint.java
@@ -1030,6 +1030,7 @@ public class TestCheckpoint {
    */
   @Test
   public void testCheckpoint() throws IOException {
+    Path tmpDir = new Path("/tmp_tmp");
     Path file1 = new Path("checkpoint.dat");
     Path file2 = new Path("checkpoint2.dat");
     Configuration conf = new HdfsConfiguration();
@@ -1057,6 +1058,11 @@ public class TestCheckpoint {
           replication, seed);
       checkFile(fileSys, file1, replication);
 
+      for(int i=0; i < 1000; i++) {
+        fileSys.mkdirs(tmpDir);
+        fileSys.delete(tmpDir, true);
+      }
+
       //
       // Take a checkpoint
       //
@@ -1081,7 +1087,6 @@ public class TestCheckpoint {
     //
     // Restart cluster and verify that file1 still exist.
     //
-    Path tmpDir = new Path("/tmp_tmp");
     try {
       cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDatanodes)
           .format(false).build();