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

I've experienced the same error message. I posted about it in my blog (spanish).

Reading the above answers and adding up my own experience I can tell that if you see this exception thrown it actually is an initialization problem. Look at syntax changes or code that is executed during initialization. Check your container logs (like catalina.out on Tomcat).