System logger issues ENF event code 48 to broadcast status changes in the system logger address space, log streams, and coupling facility structures. Since these status changes can affect the outcome of system logger service requests, IBM® recommends that you use ENF event code 48 to receive notification of these status changes, using the ENFREQ service to listen for event 48. Note that your program must be authorized to use the ENFREQ service. Applications should issue the ENFREQ service to listen for event 48 before connecting to a log stream.
Applications that do not want to use ENF event code 48 or that are unauthorized and cannot use ENFREQ will still receive logger service return and reason codes indicating failure or resource shortages. These applications can then simply set a timer and then retry the requests to see if the problem has resolved itself.