debc5e21_Activiti_User_Guide_Table_1__Supported_events_Event_name
[Description] An activity is going to be cancelled. There can be three reasons for activity cancellation (MessageEventSubscriptionEntity, SignalEventSubscriptionEntity, TimerEntity). [Event classes] org.activiti…​ActivitiActivityCancelledEvent [Event name] 
ACTIVITY_CANCELLED
Activiti User Guide
Event name