hushed laurel
When calling a GRPC server,
exceptions are returned as plain Error objects instead of RpcException.
This makes it impossible to filter using RpcExceptionFilter.
As well as forcing every call to be wrapped in a try catch rather than relying on the filter.
visual epoch
You can't serialize errors over the wire (or at least it's not done by any abstraction for you). It's the same thing as calling a http endpoint - you get errors as JSON responses that you need to parse. Errors can't travel over wires.