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HADOOP-8071. Avoid an extra packet in client code when nagling is disabled. Contributed by Todd Lipcon. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1244190 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2012-02-14 19:47:18 +00:00
parent 26d098b855
commit 6fe9bd2e68
2 changed files with 9 additions and 3 deletions
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2
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -14,6 +14,8 @@ Release 0.23.2 - UNRELEASED
(szetszwo)
OPTIMIZATIONS
HADOOP-8071. Avoid an extra packet in client code when nagling is
disabled. (todd)
BUG FIXES

10
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java
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@ -788,12 +788,16 @@ public class Client {
//for serializing the
//data to be written
d = new DataOutputBuffer();
d.writeInt(0); // placeholder for data length
d.writeInt(call.id);
call.param.write(d);
byte[] data = d.getData();
int dataLength = d.getLength();
out.writeInt(dataLength); //first put the data length
out.write(data, 0, dataLength);//write the data
int dataLength = d.getLength() - 4;
data[0] = (byte)((dataLength >>> 24) & 0xff);
data[1] = (byte)((dataLength >>> 16) & 0xff);
data[2] = (byte)((dataLength >>> 8) & 0xff);
data[3] = (byte)(dataLength & 0xff);
out.write(data, 0, dataLength + 4);//write the data
out.flush();
}
} catch(IOException e) {