Apache
/
hadoop
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

HDFS-2751. Datanode may incorrectly drop OS cache behind reads even for short reads. Contributed by Todd Lipcon. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1233795 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2012-01-20 07:31:44 +00:00
parent 3801eee036
commit 5809510395
2 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -161,6 +161,9 @@ Release 0.23.1 - UNRELEASED
HDFS-2810. Leases not getting renewed properly by clients (todd) 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 Release 0.23.0 - 2011-11-01
INCOMPATIBLE CHANGES INCOMPATIBLE CHANGES

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
View File

@ -315,7 +315,7 @@ class BlockSender implements java.io.Closeable {
* close opened files. * close opened files.
*/ */
public void close() throws IOException { public void close() throws IOException {
if (blockInFd != null && shouldDropCacheBehindRead) { if (blockInFd != null && shouldDropCacheBehindRead && isLongRead()) {
// drop the last few MB of the file from cache // drop the last few MB of the file from cache
try { try {
NativeIO.posixFadviseIfPossible( NativeIO.posixFadviseIfPossible(