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HADOOP-9425 Add error codes to rpc-response (sanjay Radia) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1479143 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Sanjay Radia 2013-05-04 17:51:22 +00:00
parent c0fa9d2231
commit 725623534c
14 changed files with 329 additions and 92 deletions
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2
hadoop-common-project/hadoop-common/CHANGES.txt
View File

@ -19,6 +19,8 @@ Trunk (Unreleased)
HADOOP-9194. RPC Support for QoS. (Junping Du via llu)
HADOOP-9425 Add error codes to rpc-response (sanjay Radia)
NEW FEATURES
HADOOP-8561. Introduce HADOOP_PROXY_USER for secure impersonation in child

10
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java
View File

@ -65,6 +65,7 @@ import org.apache.hadoop.io.retry.RetryPolicy.RetryAction;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcRequestHeaderProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcRequestHeaderProto.OperationProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcStatusProto;
import org.apache.hadoop.net.ConnectTimeoutException;
import org.apache.hadoop.net.NetUtils;
@ -987,8 +988,15 @@ public class Client {
"ServerDidNotSetExceptionClassName";
final String errorMsg = header.hasErrorMsg() ?
header.getErrorMsg() : "ServerDidNotSetErrorMsg" ;
final RpcErrorCodeProto erCode =
(header.hasErrorDetail() ? header.getErrorDetail() : null);
if (erCode == null) {
LOG.warn("Detailed error code not set by server on rpc error");
}
RemoteException re =
new RemoteException(exceptionClassName, errorMsg);
( (erCode == null) ?
new RemoteException(exceptionClassName, errorMsg) :
new RemoteException(exceptionClassName, errorMsg, erCode));
if (status == RpcStatusProto.ERROR) {
call.setException(re);
calls.remove(callId);

11
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ProtobufRpcEngine.java
View File

@ -437,8 +437,8 @@ public class ProtobufRpcEngine implements RpcEngine {
*/
static class ProtoBufRpcInvoker implements RpcInvoker {
private static ProtoClassProtoImpl getProtocolImpl(RPC.Server server,
String protoName, long version) throws IOException {
ProtoNameVer pv = new ProtoNameVer(protoName, version);
String protoName, long clientVersion) throws RpcServerException {
ProtoNameVer pv = new ProtoNameVer(protoName, clientVersion);
ProtoClassProtoImpl impl =
server.getProtocolImplMap(RPC.RpcKind.RPC_PROTOCOL_BUFFER).get(pv);
if (impl == null) { // no match for Protocol AND Version
@ -446,10 +446,11 @@ public class ProtobufRpcEngine implements RpcEngine {
server.getHighestSupportedProtocol(RPC.RpcKind.RPC_PROTOCOL_BUFFER,
protoName);
if (highest == null) {
throw new IOException("Unknown protocol: " + protoName);
throw new RpcNoSuchProtocolException(
"Unknown protocol: " + protoName);
}
// protocol supported but not the version that client wants
throw new RPC.VersionMismatch(protoName, version,
throw new RPC.VersionMismatch(protoName, clientVersion,
highest.version);
}
return impl;
@ -513,7 +514,7 @@ public class ProtobufRpcEngine implements RpcEngine {
String msg = "Unknown method " + methodName + " called on "
+ connectionProtocolName + " protocol.";
LOG.warn(msg);
throw new RpcServerException(msg);
throw new RpcNoSuchMethodException(msg);
}
Message prototype = service.getRequestPrototype(methodDescriptor);
Message param = prototype.newBuilderForType()

17
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RPC.java
View File

@ -43,6 +43,8 @@ import org.apache.hadoop.io.*;
import org.apache.hadoop.io.retry.RetryPolicy;
import org.apache.hadoop.ipc.Client.ConnectionId;
import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.ProtocolInfoService;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcStatusProto;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.security.SaslRpcServer;
import org.apache.hadoop.security.UserGroupInformation;
@ -213,7 +215,7 @@ public class RPC {
/**
* A version mismatch for the RPC protocol.
*/
public static class VersionMismatch extends IOException {
public static class VersionMismatch extends RpcServerException {
private static final long serialVersionUID = 0;
private String interfaceName;
@ -257,6 +259,19 @@ public class RPC {
public long getServerVersion() {
return serverVersion;
}
/**
* get the rpc status corresponding to this exception
*/
public RpcStatusProto getRpcStatusProto() {
return RpcStatusProto.ERROR;
}
/**
* get the detailed rpc status corresponding to this exception
*/
public RpcErrorCodeProto getRpcErrorCodeProto() {
return RpcErrorCodeProto.ERROR_RPC_VERSION_MISMATCH;
}
}
/**

16
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RemoteException.java
View File

@ -21,23 +21,39 @@ package org.apache.hadoop.ipc;
import java.io.IOException;
import java.lang.reflect.Constructor;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.xml.sax.Attributes;
public class RemoteException extends IOException {
/** For java.io.Serializable */
private static final long serialVersionUID = 1L;
private final int errorCode;
private String className;
public RemoteException(String className, String msg) {
super(msg);
this.className = className;
errorCode = -1;
}
public RemoteException(String className, String msg, RpcErrorCodeProto erCode) {
super(msg);
this.className = className;
if (erCode != null)
errorCode = erCode.getNumber();
else
errorCode = -1;
}
public String getClassName() {
return className;
}
public RpcErrorCodeProto getErrorCode() {
return RpcErrorCodeProto.valueOf(errorCode);
}
/**
* If this remote exception wraps up one of the lookupTypes
* then return this exception.

47
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RpcNoSuchMethodException.java Normal file
View File

@ -0,0 +1,47 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.ipc;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcStatusProto;
/**
* No such Method for an Rpc Call
*
*/
public class RpcNoSuchMethodException extends RpcServerException {
private static final long serialVersionUID = 1L;
public RpcNoSuchMethodException(final String message) {
super(message);
}
/**
* get the rpc status corresponding to this exception
*/
public RpcStatusProto getRpcStatusProto() {
return RpcStatusProto.ERROR;
}
/**
* get the detailed rpc status corresponding to this exception
*/
public RpcErrorCodeProto getRpcErrorCodeProto() {
return RpcErrorCodeProto.ERROR_NO_SUCH_METHOD;
}
}

46
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RpcNoSuchProtocolException.java Normal file
View File

@ -0,0 +1,46 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.ipc;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcStatusProto;
/**
* No such protocol (i.e. interface) for and Rpc Call
*
*/
public class RpcNoSuchProtocolException extends RpcServerException {
private static final long serialVersionUID = 1L;
public RpcNoSuchProtocolException(final String message) {
super(message);
}
/**
* get the rpc status corresponding to this exception
*/
public RpcStatusProto getRpcStatusProto() {
return RpcStatusProto.ERROR;
}
/**
* get the detailed rpc status corresponding to this exception
*/
public RpcErrorCodeProto getRpcErrorCodeProto() {
return RpcErrorCodeProto.ERROR_NO_SUCH_PROTOCOL;
}
}

17
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RpcServerException.java
View File

@ -17,6 +17,9 @@
*/
package org.apache.hadoop.ipc;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcStatusProto;
/**
* Indicates an exception on the RPC server
*/
@ -42,4 +45,18 @@ public class RpcServerException extends RpcException {
public RpcServerException(final String message, final Throwable cause) {
super(message, cause);
}
/**
* get the rpc status corresponding to this exception
*/
public RpcStatusProto getRpcStatusProto() {
return RpcStatusProto.ERROR;
}
/**
* get the detailed rpc status corresponding to this exception
*/
public RpcErrorCodeProto getRpcErrorCodeProto() {
return RpcErrorCodeProto.ERROR_RPC_SERVER;
}
}

104
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java
View File

@ -83,6 +83,7 @@ import org.apache.hadoop.ipc.metrics.RpcDetailedMetrics;
import org.apache.hadoop.ipc.metrics.RpcMetrics;
import org.apache.hadoop.ipc.protobuf.IpcConnectionContextProtos.IpcConnectionContextProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcStatusProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.*;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.security.AccessControlException;
@ -1438,7 +1439,8 @@ public abstract class Server {
final String ioeMessage = ioe.getLocalizedMessage();
if (authMethod == AuthMethod.SIMPLE) {
setupResponse(authFailedResponse, authFailedCall,
RpcStatusProto.FATAL, null, ioeClass, ioeMessage);
RpcStatusProto.FATAL, RpcErrorCodeProto.FATAL_UNAUTHORIZED,
null, ioeClass, ioeMessage);
responder.doRespond(authFailedCall);
} else {
doSaslReply(SaslStatus.ERROR, null, ioeClass, ioeMessage);
@ -1528,7 +1530,8 @@ public abstract class Server {
if (clientVersion >= 9) {
// Versions >>9 understand the normal response
Call fakeCall = new Call(-1, null, this);
setupResponse(buffer, fakeCall, RpcStatusProto.FATAL,
setupResponse(buffer, fakeCall,
RpcStatusProto.FATAL, RpcErrorCodeProto.FATAL_VERSION_MISMATCH,
null, VersionMismatch.class.getName(), errMsg);
responder.doRespond(fakeCall);
} else if (clientVersion >= 3) {
@ -1557,8 +1560,9 @@ public abstract class Server {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
Call fakeCall = new Call(-1, null, this);
setupResponse(buffer, fakeCall, RpcStatusProto.FATAL, null,
IpcException.class.getName(), errMsg);
setupResponse(buffer, fakeCall,
RpcStatusProto.FATAL, RpcErrorCodeProto.FATAL_UNSUPPORTED_SERIALIZATION,
null, IpcException.class.getName(), errMsg);
responder.doRespond(fakeCall);
}
@ -1647,7 +1651,7 @@ public abstract class Server {
private void processOneRpc(byte[] buf) throws IOException,
InterruptedException {
if (connectionContextRead) {
processData(buf);
processRpcRequest(buf);
} else {
processConnectionContext(buf);
connectionContextRead = true;
@ -1659,7 +1663,17 @@ public abstract class Server {
}
}
private void processData(byte[] buf) throws IOException, InterruptedException {
/**
* Process an RPC Request - the connection headers and context have been
* read
* @param buf - contains the RPC request header and the rpc request
* @throws RpcServerException due to fatal rpc layer issues such as
* invalid header. In this case a RPC fatal status response is sent back
* to client.
*/
private void processRpcRequest(byte[] buf)
throws RpcServerException, IOException, InterruptedException {
DataInputStream dis =
new DataInputStream(new ByteArrayInputStream(buf));
RpcRequestHeaderProto header = RpcRequestHeaderProto.parseDelimitedFrom(dis);
@ -1667,51 +1681,58 @@ public abstract class Server {
if (LOG.isDebugEnabled())
LOG.debug(" got #" + header.getCallId());
if (!header.hasRpcOp()) {
throw new IOException(" IPC Server: No rpc op in rpcRequestHeader");
String err = " IPC Server: No rpc op in rpcRequestHeader";
respondBadRpcHeader(new Call(header.getCallId(), null, this),
RpcServerException.class.getName(), err);
throw new RpcServerException(err);
}
if (header.getRpcOp() !=
RpcRequestHeaderProto.OperationProto.RPC_FINAL_PACKET) {
throw new IOException("IPC Server does not implement operation" +
header.getRpcOp());
String err = "IPC Server does not implement rpc header operation" +
header.getRpcOp();
respondBadRpcHeader(new Call(header.getCallId(), null, this),
RpcServerException.class.getName(), err);
throw new RpcServerException(err);
}
// If we know the rpc kind, get its class so that we can deserialize
// (Note it would make more sense to have the handler deserialize but
// we continue with this original design.
if (!header.hasRpcKind()) {
throw new IOException(" IPC Server: No rpc kind in rpcRequestHeader");
String err = " IPC Server: No rpc kind in rpcRequestHeader";
respondBadRpcHeader(new Call(header.getCallId(), null, this),
RpcServerException.class.getName(), err);
throw new RpcServerException(err);
}
Class<? extends Writable> rpcRequestClass =
getRpcRequestWrapper(header.getRpcKind());
if (rpcRequestClass == null) {
LOG.warn("Unknown rpc kind " + header.getRpcKind() +
" from client " + getHostAddress());
final Call readParamsFailedCall =
new Call(header.getCallId(), null, this);
ByteArrayOutputStream responseBuffer = new ByteArrayOutputStream();
setupResponse(responseBuffer, readParamsFailedCall, RpcStatusProto.FATAL, null,
IOException.class.getName(),
"Unknown rpc kind " + header.getRpcKind());
responder.doRespond(readParamsFailedCall);
return;
final String err = "Unknown rpc kind in rpc header" +
header.getRpcKind();
respondBadRpcHeader(new Call(header.getCallId(), null, this),
RpcServerException.class.getName(), err);
throw new RpcServerException(err);
}
Writable rpcRequest;
try { //Read the rpc request
rpcRequest = ReflectionUtils.newInstance(rpcRequestClass, conf);
rpcRequest.readFields(dis);
} catch (Throwable t) {
} catch (Throwable t) { // includes runtime exception from newInstance
LOG.warn("Unable to read call parameters for client " +
getHostAddress() + "on connection protocol " +
this.protocolName + " for rpcKind " + header.getRpcKind(), t);
final Call readParamsFailedCall =
new Call(header.getCallId(), null, this);
ByteArrayOutputStream responseBuffer = new ByteArrayOutputStream();
String err = "IPC server unable to read call parameters: "+ t.getMessage();
setupResponse(responseBuffer, readParamsFailedCall, RpcStatusProto.FATAL, null,
t.getClass().getName(),
"IPC server unable to read call parameters: " + t.getMessage());
setupResponse(responseBuffer, readParamsFailedCall,
RpcStatusProto.FATAL, RpcErrorCodeProto.FATAL_DESERIALIZING_REQUEST,
null, t.getClass().getName(),
err);
responder.doRespond(readParamsFailedCall);
return;
throw new RpcServerException(err, t);
}
Call call = new Call(header.getCallId(), rpcRequest, this,
@ -1737,7 +1758,8 @@ public abstract class Server {
rpcMetrics.incrAuthorizationSuccesses();
} catch (AuthorizationException ae) {
rpcMetrics.incrAuthorizationFailures();
setupResponse(authFailedResponse, authFailedCall, RpcStatusProto.FATAL, null,
setupResponse(authFailedResponse, authFailedCall,
RpcStatusProto.FATAL, RpcErrorCodeProto.FATAL_UNAUTHORIZED, null,
ae.getClass().getName(), ae.getMessage());
responder.doRespond(authFailedCall);
return false;
@ -1799,6 +1821,8 @@ public abstract class Server {
}
String errorClass = null;
String error = null;
RpcStatusProto returnStatus = RpcStatusProto.SUCCESS;
RpcErrorCodeProto detailedErr = null;
Writable value = null;
CurCall.set(call);
@ -1839,7 +1863,14 @@ public abstract class Server {
} else {
LOG.info(logMsg, e);
}
if (e instanceof RpcServerException) {
RpcServerException rse = ((RpcServerException)e);
returnStatus = rse.getRpcStatusProto();
detailedErr = rse.getRpcErrorCodeProto();
} else {
returnStatus = RpcStatusProto.ERROR;
detailedErr = RpcErrorCodeProto.ERROR_APPLICATION;
}
errorClass = e.getClass().getName();
error = StringUtils.stringifyException(e);
// Remove redundant error class name from the beginning of the stack trace
@ -1854,8 +1885,8 @@ public abstract class Server {
// responder.doResponse() since setupResponse may use
// SASL to encrypt response data and SASL enforces
// its own message ordering.
setupResponse(buf, call, (error == null) ? RpcStatusProto.SUCCESS
: RpcStatusProto.ERROR, value, errorClass, error);
setupResponse(buf, call, returnStatus, detailedErr,
value, errorClass, error);
// Discard the large buf and reset it back to smaller size
// to free up heap
@ -2026,7 +2057,7 @@ public abstract class Server {
* @throws IOException
*/
private void setupResponse(ByteArrayOutputStream responseBuf,
Call call, RpcStatusProto status,
Call call, RpcStatusProto status, RpcErrorCodeProto erCode,
Writable rv, String errorClass, String error)
throws IOException {
responseBuf.reset();
@ -2065,6 +2096,7 @@ public abstract class Server {
// buffer is reset at the top, and since status is changed
// to ERROR it won't infinite loop.
setupResponse(responseBuf, call, RpcStatusProto.ERROR,
RpcErrorCodeProto.ERROR_SERIALIZING_RESPONSE,
null, t.getClass().getName(),
StringUtils.stringifyException(t));
return;
@ -2072,6 +2104,7 @@ public abstract class Server {
} else { // Rpc Failure
headerBuilder.setExceptionClassName(errorClass);
headerBuilder.setErrorMsg(error);
headerBuilder.setErrorDetail(erCode);
RpcResponseHeaderProto header = headerBuilder.build();
int headerLen = header.getSerializedSize();
final int fullLength =
@ -2116,6 +2149,19 @@ public abstract class Server {
call.setResponse(ByteBuffer.wrap(response.toByteArray()));
}
private void respondBadRpcHeader(Call call, String errorClass, String error)
throws IOException
{
ByteArrayOutputStream responseBuf = new ByteArrayOutputStream();
setupResponse(responseBuf, call,
RpcStatusProto.FATAL, RpcErrorCodeProto.FATAL_INVALID_RPC_HEADER,
null, errorClass, error);
responder.doRespond(call);
return;
}
private void wrapWithSasl(ByteArrayOutputStream response, Call call)
throws IOException {
if (call.connection.saslServer != null) {

94
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/WritableRpcEngine.java
View File

@ -416,62 +416,62 @@ public class WritableRpcEngine implements RpcEngine {
@Override
public Writable call(org.apache.hadoop.ipc.RPC.Server server,
String protocolName, Writable rpcRequest, long receivedTime)
throws IOException {
try {
Invocation call = (Invocation)rpcRequest;
if (server.verbose) log("Call: " + call);
throws IOException, RPC.VersionMismatch {
// Verify rpc version
if (call.getRpcVersion() != writableRpcVersion) {
// Client is using a different version of WritableRpc
throw new IOException(
"WritableRpc version mismatch, client side version="
+ call.getRpcVersion() + ", server side version="
+ writableRpcVersion);
Invocation call = (Invocation)rpcRequest;
if (server.verbose) log("Call: " + call);
// Verify writable rpc version
if (call.getRpcVersion() != writableRpcVersion) {
// Client is using a different version of WritableRpc
throw new RpcServerException(
"WritableRpc version mismatch, client side version="
+ call.getRpcVersion() + ", server side version="
+ writableRpcVersion);
}
long clientVersion = call.getProtocolVersion();
final String protoName;
ProtoClassProtoImpl protocolImpl;
if (call.declaringClassProtocolName.equals(VersionedProtocol.class.getName())) {
// VersionProtocol methods are often used by client to figure out
// which version of protocol to use.
//
// Versioned protocol methods should go the protocolName protocol
// rather than the declaring class of the method since the
// the declaring class is VersionedProtocol which is not
// registered directly.
// Send the call to the highest protocol version
VerProtocolImpl highest = server.getHighestSupportedProtocol(
RPC.RpcKind.RPC_WRITABLE, protocolName);
if (highest == null) {
throw new RpcServerException("Unknown protocol: " + protocolName);
}
protocolImpl = highest.protocolTarget;
} else {
protoName = call.declaringClassProtocolName;
long clientVersion = call.getProtocolVersion();
final String protoName;
ProtoClassProtoImpl protocolImpl;
if (call.declaringClassProtocolName.equals(VersionedProtocol.class.getName())) {
// VersionProtocol methods are often used by client to figure out
// which version of protocol to use.
//
// Versioned protocol methods should go the protocolName protocol
// rather than the declaring class of the method since the
// the declaring class is VersionedProtocol which is not
// registered directly.
// Send the call to the highest protocol version
VerProtocolImpl highest = server.getHighestSupportedProtocol(
RPC.RpcKind.RPC_WRITABLE, protocolName);
// Find the right impl for the protocol based on client version.
ProtoNameVer pv =
new ProtoNameVer(call.declaringClassProtocolName, clientVersion);
protocolImpl =
server.getProtocolImplMap(RPC.RpcKind.RPC_WRITABLE).get(pv);
if (protocolImpl == null) { // no match for Protocol AND Version
VerProtocolImpl highest =
server.getHighestSupportedProtocol(RPC.RpcKind.RPC_WRITABLE,
protoName);
if (highest == null) {
throw new IOException("Unknown protocol: " + protocolName);
}
protocolImpl = highest.protocolTarget;
} else {
protoName = call.declaringClassProtocolName;
// Find the right impl for the protocol based on client version.
ProtoNameVer pv =
new ProtoNameVer(call.declaringClassProtocolName, clientVersion);
protocolImpl =
server.getProtocolImplMap(RPC.RpcKind.RPC_WRITABLE).get(pv);
if (protocolImpl == null) { // no match for Protocol AND Version
VerProtocolImpl highest =
server.getHighestSupportedProtocol(RPC.RpcKind.RPC_WRITABLE,
protoName);
if (highest == null) {
throw new IOException("Unknown protocol: " + protoName);
} else { // protocol supported but not the version that client wants
throw new RPC.VersionMismatch(protoName, clientVersion,
highest.version);
}
throw new RpcServerException("Unknown protocol: " + protoName);
} else { // protocol supported but not the version that client wants
throw new RPC.VersionMismatch(protoName, clientVersion,
highest.version);
}
}
}
// Invoke the protocol method
try {
long startTime = Time.now();
Method method =
protocolImpl.protocolClass.getMethod(call.getMethodName(),

2
hadoop-common-project/hadoop-common/src/main/proto/ProtobufRpcEngine.proto
View File

@ -1,4 +1,4 @@
/**DER
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information

39
hadoop-common-project/hadoop-common/src/main/proto/RpcHeader.proto
View File

@ -62,27 +62,55 @@ message RpcRequestHeaderProto { // the header for the RpcRequest
/**
* Rpc Response Header
* ** If request is successfull response is returned as below ********
* +------------------------------------------------------------------+
* | Rpc reponse length in bytes (4 bytes int) |
* | Rpc total response length in bytes (4 bytes int) |
* | (sum of next two parts) |
* +------------------------------------------------------------------+
* | RpcResponseHeaderProto - serialized delimited ie has len |
* +------------------------------------------------------------------+
* | if request is successful: |
* | - RpcResponse - The actual rpc response bytes follow |
* the response header |
* | the response header |
* | This response is serialized based on RpcKindProto |
* | if request fails : |
* | The rpc response header contains the necessary info |
* +------------------------------------------------------------------+
*
* Note that rpc response header is also used when connection setup fails.
* Ie the response looks like a rpc response with a fake callId.
*/
message RpcResponseHeaderProto {
/**
*
* RpcStastus - success or failure
* The reponseHeader's errDetail, exceptionClassName and errMsg contains
* further details on the error
**/
enum RpcStatusProto {
SUCCESS = 0; // RPC succeeded
ERROR = 1; // RPC Failed
FATAL = 2; // Fatal error - connection is closed
ERROR = 1; // RPC or error - connection left open for future calls
FATAL = 2; // Fatal error - connection closed
}
enum RpcErrorCodeProto {
// Non-fatal Rpc error - connection left open for future rpc calls
ERROR_APPLICATION = 1; // RPC Failed - rpc app threw exception
ERROR_NO_SUCH_METHOD = 2; // Rpc error - no such method
ERROR_NO_SUCH_PROTOCOL = 3; // Rpc error - no such protocol
ERROR_RPC_SERVER = 4; // Rpc error on server side
ERROR_SERIALIZING_RESPONSE = 5; // error serializign response
ERROR_RPC_VERSION_MISMATCH = 6; // Rpc protocol version mismatch
// Fatal Server side Rpc error - connection closed
FATAL_UNKNOWN = 10; // unknown Fatal error
FATAL_UNSUPPORTED_SERIALIZATION = 11; // IPC layer serilization type invalid
FATAL_INVALID_RPC_HEADER = 12; // fields of RpcHeader are invalid
FATAL_DESERIALIZING_REQUEST = 13; // could not deserilize rpc request
FATAL_VERSION_MISMATCH = 14; // Ipc Layer version mismatch
FATAL_UNAUTHORIZED = 15; // Auth failed
}
required uint32 callId = 1; // callId used in Request
@ -90,4 +118,5 @@ message RpcResponseHeaderProto {
optional uint32 serverIpcVersionNum = 3; // Sent if success or fail
optional string exceptionClassName = 4; // if request fails
optional string errorMsg = 5; // if request fails, often contains strack trace
optional RpcErrorCodeProto errorDetail = 6; // in case of error
}

5
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestProtoBufRpc.java
View File

@ -25,6 +25,7 @@ import java.net.InetSocketAddress;
import java.net.URISyntaxException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.apache.hadoop.ipc.protobuf.TestProtos.EchoRequestProto;
import org.apache.hadoop.ipc.protobuf.TestProtos.EchoResponseProto;
import org.apache.hadoop.ipc.protobuf.TestProtos.EmptyRequestProto;
@ -183,6 +184,8 @@ public class TestProtoBufRpc {
RemoteException re = (RemoteException)e.getCause();
RpcServerException rse = (RpcServerException) re
.unwrapRemoteException(RpcServerException.class);
Assert.assertTrue(re.getErrorCode().equals(
RpcErrorCodeProto.ERROR_RPC_SERVER));
}
}
@ -223,6 +226,8 @@ public class TestProtoBufRpc {
Assert.assertTrue(re.getClassName().equals(
URISyntaxException.class.getName()));
Assert.assertTrue(re.getMessage().contains("testException"));
Assert.assertTrue(
re.getErrorCode().equals(RpcErrorCodeProto.ERROR_APPLICATION));
}
}
}

11
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestRPCCompatibility.java
View File

@ -34,6 +34,7 @@ import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.GetProtocolSignatureRequestProto;
import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.GetProtocolSignatureResponseProto;
import org.apache.hadoop.ipc.protobuf.ProtocolInfoProtos.ProtocolSignatureProto;
import org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.RpcErrorCodeProto;
import org.apache.hadoop.net.NetUtils;
import org.junit.After;
import org.junit.Before;
@ -310,9 +311,13 @@ System.out.println("echo int is NOT supported");
try {
proxy.echo(21);
fail("The call must throw VersionMismatch exception");
} catch (IOException ex) {
Assert.assertTrue("Expected version mismatch but got " + ex.getMessage(),
ex.getMessage().contains("VersionMismatch"));
} catch (RemoteException ex) {
Assert.assertEquals(RPC.VersionMismatch.class.getName(),
ex.getClassName());
Assert.assertTrue(ex.getErrorCode().equals(
RpcErrorCodeProto.ERROR_RPC_VERSION_MISMATCH));
} catch (IOException ex) {
fail("Expected version mismatch but got " + ex);
}
}