As described in #2266, the destination service responds with an error when an unexpected name is queried. This does not inform the proxy that it should not continue to query this name.

The destination service needs to return a response that informs the proxy that it should not use discovery for this name.

As a proposal: the server can respond with a InvalidArgument error status to indicate that this name cannot be processed; and, as a part of #2661, the proxy should handle this error to indicate that the original dst addr should be used.