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MAPREDUCE-4274 MapOutputBuffer should use native byte order for kvmeta. (todd via bobby) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1341151 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Robert Joseph Evans 2012-05-21 19:05:19 +00:00
parent d69510a7f8
commit 2eebc21a55
2 changed files with 7 additions and 1 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -130,6 +130,9 @@ Release 2.0.1-alpha - UNRELEASED
MAPREDUCE-4002. MultiFileWordCount job fails if the input path is not
from default file system. (Bhallamudi Venkata Siva Kamesh via todd)
MAPREDUCE-4274 MapOutputBuffer should use native byte order for kvmeta.
(todd via bobby)
Release 2.0.0-alpha - UNRELEASED
INCOMPATIBLE CHANGES

5
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/MapTask.java
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@ -25,6 +25,7 @@ import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.IntBuffer;
import java.util.ArrayList;
import java.util.List;
@ -911,7 +912,9 @@ class MapTask extends Task {
maxMemUsage -= maxMemUsage % METASIZE;
kvbuffer = new byte[maxMemUsage];
bufvoid = kvbuffer.length;
kvmeta = ByteBuffer.wrap(kvbuffer).asIntBuffer();
kvmeta = ByteBuffer.wrap(kvbuffer)
.order(ByteOrder.nativeOrder())
.asIntBuffer();
setEquator(0);
bufstart = bufend = bufindex = equator;
kvstart = kvend = kvindex;