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HADOOP-7897. ProtobufRpcEngine client side exception mechanism is not consistent with WritableRpcEngine. Contributed by Suresh Srinivas.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1212004 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas 2011-12-08 17:47:06 +00:00
parent 9f69ae5a9e
commit 4283ac6d7a
3 changed files with 29 additions and 29 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -123,6 +123,9 @@ Trunk (unreleased changes)
HADOOP-7888. TestFailoverProxy fails intermittently on trunk. (Jason Lowe
via atm)
HADOOP-7897. ProtobufRpcEngine client side exception mechanism is not
consistent with WritableRpcEngine. (suresh)
OPTIMIZATIONS
HADOOP-7761. Improve the performance of raw comparisons. (todd)

15
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ProtobufHelper.java
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@ -33,14 +33,17 @@ private ProtobufHelper() {
}
/**
* Return the RemoteException wrapped in ServiceException as cause.
* @param se ServiceException that wraps RemoteException
* @return RemoteException wrapped in ServiceException or
* a new IOException that wraps unexpected ServiceException.
* Return the IOException thrown by the remote server wrapped in
* ServiceException as cause.
* @param se ServiceException that wraps IO exception thrown by the server
* @return Exception wrapped in ServiceException or
* a new IOException that wraps the unexpected ServiceException.
*/
public static IOException getRemoteException(ServiceException se) {
Throwable e = se.getCause();
return ((e instanceof RemoteException) ? (IOException) e :
new IOException(se));
if (e == null) {
return new IOException(se);
}
return e instanceof IOException ? (IOException) e : new IOException(se);
}
}

26
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ProtobufRpcEngine.java
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@ -144,9 +144,10 @@ private HadoopRpcRequestProto constructRpcRequest(Method method,
*
* ServiceException has the following causes:
* <ol>
* <li>Exceptions encountered in this methods are thrown as
* RpcClientException, wrapped in RemoteException</li>
* <li>Remote exceptions are thrown wrapped in RemoteException</li>
* <li>Exceptions encountered on the client side in this method are
* set as cause in ServiceException as is.</li>
* <li>Exceptions from the server are wrapped in RemoteException and are
* set as cause in ServiceException</li>
* </ol>
*
* Note that the client calling protobuf RPC methods, must handle
@ -167,9 +168,8 @@ public Object invoke(Object proxy, Method method, Object[] args)
try {
val = (RpcResponseWritable) client.call(RpcKind.RPC_PROTOCOL_BUFFER,
new RpcRequestWritable(rpcRequest), remoteId);
} catch (Exception e) {
RpcClientException ce = new RpcClientException("Client exception", e);
throw new ServiceException(getRemoteException(ce));
} catch (Throwable e) {
throw new ServiceException(e);
}
HadoopRpcResponseProto response = val.message;
@ -197,9 +197,8 @@ public Object invoke(Object proxy, Method method, Object[] args)
try {
returnMessage = prototype.newBuilderForType()
.mergeFrom(response.getResponse()).build();
} catch (InvalidProtocolBufferException e) {
RpcClientException ce = new RpcClientException("Client exception", e);
throw new ServiceException(getRemoteException(ce));
} catch (Throwable e) {
throw new ServiceException(e);
}
return returnMessage;
}
@ -309,11 +308,6 @@ public RPC.Server getServer(Class<?> protocol, Object protocolImpl,
numHandlers, numReaders, queueSizePerHandler, verbose, secretManager);
}
private static RemoteException getRemoteException(Exception e) {
return new RemoteException(e.getClass().getName(),
StringUtils.stringifyException(e));
}
public static class Server extends RPC.Server {
/**
* Construct an RPC server.
@ -335,8 +329,8 @@ public Server(Class<?> protocolClass, Object protocolImpl,
numReaders, queueSizePerHandler, conf, classNameBase(protocolImpl
.getClass().getName()), secretManager);
this.verbose = verbose;
registerProtocolAndImpl(RpcKind.RPC_PROTOCOL_BUFFER,
protocolClass, protocolImpl);
registerProtocolAndImpl(RpcKind.RPC_PROTOCOL_BUFFER, protocolClass,
protocolImpl);
}
private static RpcResponseWritable handleException(Throwable e) {