Activating the FACILITY class

If the FACILITY class is not active, activate it as follows:
```
SETROPTS CLASSACT(FACILITY)
```
You only need to issue this command once. When a general resource class is active, it remains active until your installation deactivates it.
To avoid possible deadlocks, issue a SETROPTS RACLIST command for the FACILITY class.
Example of a Deadlock:
There are several types of deadlocks. This example describes one way a deadlock can occur.
- Task A of a job is abending.
  - z/OS needs to check the user's authority to produce a dump of the task and issues RACROUTE REQUEST=AUTH.
  - RACF® needs to do I/O to the RACF database to respond to the RACROUTE request.
- Task B of the same job is already performing a RACF function and has ENQed the RACF database.
- Task A must wait until task B releases the ENQ.
- Dump processing for task A has set all other tasks in the job non-dispatchable.
Under normal circumstances, task A could wait for task B to release the ENQ. However, because dump processing for the abending task prevents task B from completing, task A cannot proceed. Task B cannot complete until task A proceeds. This causes a deadlock.