"Did not find handler method for" log messages with Spring Boot Actuator

Question

When I include the actuator and enable debug logging messages then there are lots of Did not find handler method for log messages.

2015-08-14 18:34:25.335 DEBUG 94889 --- [nio-8080-exec-5] o.s.b.a.e.mvc.EndpointHandlerMapping     : Looking up handler method for path /index.html
2015-08-14 18:34:25.336 DEBUG 94889 --- [nio-8080-exec-5] o.s.b.a.e.mvc.EndpointHandlerMapping     : Did not find handler method for [/index.html]

When I remove the actuator then these log messages disappear.

I have tried with versions Spring Boot 1.2.5 and 1.3.0.M3 and it works the same. It is easy to try out by generating a project with spring initializr using web and actuator dependencies.

Do you know what could be the reason?

Thank you.

Answer 1

The Actuator adds EndpointHandlerMapping to route requests to the various endpoints that it provides. When a request is received, Spring MVC asks each handler mapping in turn for the handler for the request, stopping as soon as one is provided. The log messages are produced when a request for /index.html is made. There's no endpoint mapped to that path so EndpointHandlerMapping returns null and Spring MVC moves on to the next mapping.