Tomcat using 100% CPU when application/json (JSONMessageFormatter) is used

I am trying to connect to my webservice using GET + JSON.

I've added JSONMessageFormatter and JSONOMBuilder for "application/json" content type.

When I try to call the webservice using jQuery and HTTP GET with content type "application/xml" I receive the response almost immediately (note that there is a jQuery error raised afterwards, because Xml cannot be parsed as JSON).

When I try to call the webservice using the same code but with content type "application/json" there is no response and Tomcat uses 100% of CPU (there are also some messages in log file mentioning that it should have ended).

See my aar file and jQuery example attached. Also see my axis2.xml configuration.