So usually, if you are interested in a particular plugin and its not visible in the hawtio UI (after checking your preferences in case you disabled it), usually you just need to deploy or add a server ...
at org.jolokia.converter.json.BeanExtractor.addAttributes(BeanExtractor.java:189) at org.jolokia.converter.json.BeanExtractor.extractBeanAttributes(BeanExtractor.java ...