Sometimes it is easy to make a mistake with argument names in @QueryMapping methods. This is not reported by schema introspection and error will bubble up on query execution.

Here is a sample schema:

type Query { getVehicle(id: ID): Vehicle }

And this is example controller:

@Controller class VehicleController { @QueryMapping fun getVehicle(@Argument vehicleId: String) = null }

@Argument allows to map the argument name internally, though it will be really nice to see such kind of mismatch reported by schema introspection report.