Resource must be declared in context configuration under Tomcat

Hello,

First of all : congratulations, our tool is a great project ! I use it from few month. The dashboard is really friendly. The must lacking point is that I can't import Findbugs rules defined on my Maven2 project. This configuration in the tool is boring.

Subject of my entry : I've deployed it under tomcat6 (see environment description for more details), using JNDI configuration.
I notice that the JNDI resource configuration works only when it is made under context scope. On global scope, rails can't work.
I think it could be well to note this in your documentation and/or in the application exception management made, actually returning the following message : "Sonar server at http://monserver:9999/sonar is unreacheable, either start it or setup the sonar.host.url maven setting if the URL is incorrect", which is not very adapted to the real problem .