@POST
@Path("BuyTickets")
@Consumes({"application/json", "application/x-protobuf"})
@Produces({"application/json", "application/x-protobuf"})
public Response BuyTickets(InputStream input) {
    IBankingBackend backend = this.getBankingBackend();
    if (backend == null) return null;
    try {
        Ticketing.BuyTicketsRequest ticketingRequest = Ticketing.BuyTicketsRequest.parseFrom(input);

        Banking.ChargeCardRequest bankingRequest = Banking.ChargeCardRequest.newBuilder().setCardNumber(ticketingRequest.getCardNumber()).setAmount(ticketingRequest.getCount()).build();

        Banking.ChargeCardResponse bankingResponse = backend.ChargeCard(bankingRequest);

        Ticketing.BuyTicketsResponse ticketingResponse = Ticketing.BuyTicketsResponse.newBuilder().setSuccess(bankingResponse.getSuccess()).build();

        return Response.ok(ticketingResponse.toByteArray()).build();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return Response.serverError().build();
}

ERROR [stderr] (default task-1) com.google.protobuf.InvalidProtocolBufferException$InvalidWireTypeException: Protocol message tag had invalid wire type.