From 559cb11551d7045015aa60afe7e7998fe0b2ef13 Mon Sep 17 00:00:00 2001
From: Takanobu Asanuma <tasanuma@apache.org>
Date: Tue, 5 Feb 2019 06:06:05 +0900
Subject: [PATCH] HDFS-13404. RBF:
 TestRouterWebHDFSContractAppend.testRenameFileBeingAppended fails.

---
 .../hadoop/fs/contract/AbstractContractAppendTest.java      | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractAppendTest.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractAppendTest.java
index d61b635449..02a899613c 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractAppendTest.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractAppendTest.java
@@ -133,6 +133,12 @@ public abstract class AbstractContractAppendTest extends AbstractFSContractTestB
     assertPathExists("original file does not exist", target);
     byte[] dataset = dataset(256, 'a', 'z');
     FSDataOutputStream outputStream = getFileSystem().append(target);
+    if (isSupported(CREATE_VISIBILITY_DELAYED)) {
+      // Some filesystems like WebHDFS doesn't assure sequential consistency.
+      // In such a case, delay is needed. Given that we can not check the lease
+      // because here is closed in client side package, simply add a sleep.
+      Thread.sleep(10);
+    }
     outputStream.write(dataset);
     Path renamed = new Path(testPath, "renamed");
     rename(target, renamed);