From a206399afd242463d96410681f01c4b4aa225f17 Mon Sep 17 00:00:00 2001
From: Tsz-wo Sze <szetszwo@apache.org>
Date: Wed, 26 Mar 2014 17:03:05 +0000
Subject: [PATCH] HDFS-6115. Call flush() for every append on block scan
 verification log.  Contributed by Vinayakumar B

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1581936 13f79535-47bb-0310-9956-ffa450edef68
---
 hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt                    | 3 +++
 .../hdfs/server/datanode/fsdataset/impl/RollingLogsImpl.java   | 1 +
 2 files changed, 4 insertions(+)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 767f1d9467..54aaac8a5e 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -703,6 +703,9 @@ Release 2.4.0 - UNRELEASED
     HDFS-6130. NPE when upgrading namenode from fsimages older than -32.
     (wheat9)
 
+    HDFS-6115. Call flush() for every append on block scan verification log.
+    (Vinayakumar B via szetszwo)
+
   BREAKDOWN OF HDFS-5698 SUBTASKS AND RELATED JIRAS
 
     HDFS-5717. Save FSImage header in protobuf. (Haohui Mai via jing9)
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/RollingLogsImpl.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/RollingLogsImpl.java
index ec7376b17d..ed6bcaffdb 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/RollingLogsImpl.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/RollingLogsImpl.java
@@ -55,6 +55,7 @@ public Appendable append(CharSequence csq) {
               + " is not yet opened.");
         }
         out.print(csq);
+        out.flush();
       }
       return this;
     }