CPF8E2F - Lock on *SRVPGM object

I have a created a service program and it is invoked from COBOL, CL and RPGLE programs. I am running into the below issue at times and i am not sure of the reasons. I tried searching in Google and StackOverflow as well but found no solutions.

Please let me know the possible reasons for this issue.

                    Additional Message Information                         

Message ID . . . . . . :   CPF8E2F       Severity . . . . . . . :   30         
Message type . . . . . :   Diagnostic                                          
Date sent  . . . . . . :   11/10/16      Time sent  . . . . . . :   10:54:52   

Message . . . . :   Object ACB0500R is temporarily unavailable.                
Cause . . . . . :   A lock on object ACB0500R of type *SRVPGM in library       
  LMIQALIB is currently held by another job. The object is unavailable for use 
  at this time.                                                                
Recovery  . . . :   Try to access the object again.  If the object is still    
  locked, use the WRKOBJLCK command to determine which job holds the lock.

Solution

Did you do as instructed and use the WRKOBJLCK command to see what job had a lock on the *SRVPGM?

There's no locks done on a *SRVPGM object during normal execution.

The only time a *SRVPGM or *PGM object would be locked

Backup/Restore operation
Programmer intentionally adds a lock of the object (via ALCOBJ command or an API), to prevent multiple people from running the same program and the same time.
If the *SRVPGM/*PGM is currently being run in debug in another job (maybe?)
during creation (maybe?)

3 & 4 are educated guesses...I've never actually tried to watch for a lock during those processes..

What are you trying to do when you get the lock? Execute or recreate?