Errors regarding entities in 304 responses

I'm seeing errors in my logs whenever I return a 304 (not modified response) that have the following message: Responses with a 304 (Not modified) status can\'t have an entity. Only adding entity headers for resource... I've confirmed that my resource is not returning an entity, in fact it looks

StackOverflowError

I am getting a StackOverflowError while starting up the servlet with the servlet extension. Has anyone else seen this? Here is part of the stack trace: at com.noelios.restlet.ext.servlet.ServletWarEntity.init(ServletWarEntity.java:107) at