Symptoms
K2 BlackPearl Servive can't start
Diagnoses
I had killed the K2HostServer.exe process in Windows task manager and try starting the K2 Blackpearl server again. The K2 BlackPearl server still can't startup.
Resolution
The issue was resolved by changing the Log On As to the service account for the K2 Blackpearl Server in Services. Previously, the local system account was selected.