Author: todd
Date: Fri Jan 20 07:31:44 2012
New Revision: 1233795
URL: http://svn.apache.org/viewvc?rev=1233795&view=rev
Log:
HDFS-2751. Datanode may incorrectly drop OS cache behind reads even for short
reads. Contributed by Todd Lipcon.
Modified:
hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
Modified:
hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
URL:
http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt?rev=1233795&r1=1233794&r2=1233795&view=diff
==============================================================================
---
hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
(original)
+++
hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
Fri Jan 20 07:31:44 2012
@@ -161,6 +161,9 @@ Release 0.23.1 - UNRELEASED
HDFS-2810. Leases not getting renewed properly by clients (todd)
+ HDFS-2751. Datanode may incorrectly drop OS cache behind reads
+ even for short reads. (todd)
+
Release 0.23.0 - 2011-11-01
INCOMPATIBLE CHANGES
Modified:
hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
URL:
http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java?rev=1233795&r1=1233794&r2=1233795&view=diff
==============================================================================
---
hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
(original)
+++
hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
Fri Jan 20 07:31:44 2012
@@ -315,7 +315,7 @@ class BlockSender implements java.io.Clo
* close opened files.
*/
public void close() throws IOException {
- if (blockInFd != null && shouldDropCacheBehindRead) {
+ if (blockInFd != null && shouldDropCacheBehindRead && isLongRead()) {
// drop the last few MB of the file from cache
try {
NativeIO.posixFadviseIfPossible(
