Why would “java.lang.IllegalStateException: The resource configuration is not modifiable in this context.” appear deploying Jersey app?

Question

I have created an app implementing REST services locally using:

Eclipse Indigo Jersey 2.4 Tomcat 7.0.47

When running locally using Eclipse, the services work

Answer 1

Another possible reason for getting that exception is if you try passing in a form parameter using @FormParam with an HTTP Get (@GET). It should complain since you cannot pass data in the form body with an HTTP Get. An example of code that would throw this exception is...

@GET
@Path("test-get")
@Consumes( MediaType.APPLICATION_FORM_URLENCODED )
 public String testGet(@FormParam("name1") String name1) {