XES invokes your notify exit to inform you that another connected user of a structure has requested use of the resource associated with the structure.

• For a serialized IXLLIST request, the notify exit is used to inform a connected user that other connected users have requested a lock currently owned by this user.
• For an IXLLOCK request, the notify exit is used by the connected user managing contention for a resource to communicate with other owners of the resource.

Connected users of lock and serialized list structures must provide a notify exit. The NOTIFYEXIT keyword of IXLCONN identifies the address of your routine.