Handler name is the proxy class instead of the full qualified class name

karaf@root()> cluster:handler-status 
  | Node           | Status | Event Handler                            
-----------------------------------------------------------------------
x | localhost:5701 | ON     | Proxy5cfa0b95_2808_4bf5_b12d_aa9c24d5c438
x | localhost:5701 | ON     | Proxy5883dc87_597c_41f2_be21_4831588bd5f5
x | localhost:5701 | ON     | Proxy8f986c45_a40a_4cf0_87db_dd06af232bd6