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MAPREDUCE-3885. Avoid an unnecessary copy for all requests/responses in MRs ProtoOverHadoopRpcEngine. (Contributed by Devaraj Das) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1295362 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Siddharth Seth 2012-03-01 00:56:53 +00:00
parent 7bf2f9559f
commit 7ae1523865
2 changed files with 12 additions and 6 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -97,6 +97,9 @@ Release 0.23.3 - UNRELEASED
MAPREDUCE-3909 Javadoc the Service interfaces (stevel)
MAPREDUCE-3885. Avoid an unnecessary copy for all requests/responses in
MRs ProtoOverHadoopRpcEngine. (Devaraj Das via sseth)
OPTIMIZATIONS
BUG FIXES

15
hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/ipc/ProtoOverHadoopRpcEngine.java
View File

@ -34,6 +34,8 @@ import javax.net.SocketFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.DataOutputOutputStream;
import org.apache.hadoop.io.ObjectWritable;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.ipc.Client;
import org.apache.hadoop.ipc.ProtocolMetaInfoPB;
@ -46,6 +48,7 @@ import org.apache.hadoop.ipc.RpcPayloadHeader.RpcKind;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.SecretManager;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.apache.hadoop.util.ProtoUtil;
import org.apache.hadoop.yarn.exceptions.impl.pb.YarnRemoteExceptionPBImpl;
import org.apache.hadoop.yarn.ipc.RpcProtos.ProtoSpecificRpcRequest;
import org.apache.hadoop.yarn.ipc.RpcProtos.ProtoSpecificRpcResponse;
@ -213,13 +216,13 @@ public class ProtoOverHadoopRpcEngine implements RpcEngine {
@Override
public void write(DataOutput out) throws IOException {
out.writeInt(message.toByteArray().length);
out.write(message.toByteArray());
((Message)message).writeDelimitedTo(
DataOutputOutputStream.constructOutputStream(out));
}
@Override
public void readFields(DataInput in) throws IOException {
int length = in.readInt();
int length = ProtoUtil.readRawVarint32(in);
byte[] bytes = new byte[length];
in.readFully(bytes);
message = ProtoSpecificRpcRequest.parseFrom(bytes);
@ -241,13 +244,13 @@ public class ProtoOverHadoopRpcEngine implements RpcEngine {
@Override
public void write(DataOutput out) throws IOException {
out.writeInt(message.toByteArray().length);
out.write(message.toByteArray());
((Message)message).writeDelimitedTo(
DataOutputOutputStream.constructOutputStream(out));
}
@Override
public void readFields(DataInput in) throws IOException {
int length = in.readInt();
int length = ProtoUtil.readRawVarint32(in);
byte[] bytes = new byte[length];
in.readFully(bytes);
message = ProtoSpecificRpcResponse.parseFrom(bytes);