guohao commented on issue #8363:
URL: https://github.com/apache/dubbo/issues/8363#issuecomment-897533563
Scenario1 : Non-Protobuf
Exception will be serialized and rethrowed at client side.
Scenario2 : Protobuf
Serialization of origin exception is not supported, insteadly a
`TripleRpcException` will be returned. Users can return and get custom error
code in response's attachments like this
```java
@Activate(group = {CommonConstants.CONSUMER})
public class BizErrorCodeClientFilter implements ClusterFilter,
BaseFilter.Listener {
@Override
public Result invoke(Invoker<?> invoker, Invocation invocation) throws
RpcException {
return invoker.invoke(invocation);
}
@Override
public void onResponse(Result appResponse, Invoker<?> invoker,
Invocation invocation) {
appResponse.getObjectAttachment("biz-err-code");
}
@Override
public void onError(Throwable t, Invoker<?> invoker, Invocation
invocation) {
}
}
```
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