HTTP Listener map execution results overview
Regardless of whether it runs successfully, a map returns a response through the HTTP listener to the external HTTP client. If the map fails or the output card does not return a response to the client, the input card automatically returns a response.
The response from the input card can include customized HTTP status codes and a customized text page that describe the map execution results. A default set of status codes and default status page ensures that the HTTP client always receives a response from the map.