Steps to reproduce: 

I am using zabbix 4.0 and try to discover jmx mbeans using jmx.discovery

but the beans are not discovered ,But in my jconsole the beans and the attributes are getting discovered.

e.g jmx.discovery[beans,"*:type=GarbageCollector,name=*"] this gets discovered but 

when m trying to discover the dynamic mbean its not working 

e.g 

 this should return all the attributes for the server as this mbean is server sepecific

i am using jetty as the server

Result:
See screenshot...
See log file...
See memory dump...
Expected:
See screenshot....
See attached patch file...