No Idea why : The ResourceConfig instance does not contain any root resource classes [duplicate]

Answer 1

I had the same problem, which I solved by specifying BOTH the classes package AND removing load-on-startup altogether, i.e.:

    my-servlet-name
    
        com.sun.jersey.spi.container.servlet.ServletContainer
    
    
        com.sun.jersey.config.property.packages
        my.package.name
    
    

I guess because I had more than one servlet under the same package and Jersey coudn't pick the "root" one to be loaded on startup.