With Fuse 7.8 karaf instance, user can connect JMX and expands the tree on "Servers" tab. However, with Fuse 7.9, expanding tree operation never ends.

Instruction

1: install Red Hat Fuse 7.9 karaf standalone
2: on the same mashicne, start Red Hat CodeReady Stuio
3: By following our official document, add and start the installed karaf runtime
https://access.redhat.com/documentation/en-us/red_hat_fuse/7.9/html/tooling_tutorials/ridertutdeployfesb
4: On the "Servers" tab, right click "JMX" under the added karaf runtime and select "connect"
5: Once you observer "JMX[connected", click the JMX icon and expands the tree, but it will never shows up child nodes