From b68bd472dcc09ac2baf059cd4544bed75feed3da Mon Sep 17 00:00:00 2001
From: Robert Joseph Evans <bobby@apache.org>
Date: Tue, 6 Nov 2012 18:48:49 +0000
Subject: [PATCH] YARN-202. Log Aggregation generates a storm of fsync() for
 namenode (Kihwal Lee via bobby)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1406269 13f79535-47bb-0310-9956-ffa450edef68
---
 hadoop-yarn-project/CHANGES.txt                                | 3 +++
 .../apache/hadoop/yarn/logaggregation/AggregatedLogFormat.java | 1 -
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 86b5336d503..a6102b216c4 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -199,6 +199,9 @@ Release 0.23.5 - UNRELEASED
     YARN-189. Fixed a deadlock between RM's ApplicationMasterService and the
     dispatcher. (Thomas Graves via vinodkv)
 
+    YARN-202. Log Aggregation generates a storm of fsync() for namenode 
+    (Kihwal Lee via bobby)
+
 Release 0.23.4 - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/AggregatedLogFormat.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/AggregatedLogFormat.java
index 008324f013a..4b8dff91042 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/AggregatedLogFormat.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/AggregatedLogFormat.java
@@ -263,7 +263,6 @@ public void append(LogKey logKey, LogValue logValue) throws IOException {
       out = this.writer.prepareAppendValue(-1);
       logValue.write(out);
       out.close();
-      this.fsDataOStream.hflush();
     }
 
     public void closeWriter() {