Cause: When sssd_be process was unwillingly terminated, SSSD responder processes failed to reconnect in case the attempt was performed before sssd_be was ready. This caused the responder to be restarted. The responder might get restarted several times before sssd_be is ready, hitting a maximum number of restarts threshold and than is was terminated completely.
Consequence: SSSD responder is not gracefully restarted.
Fix: Each restart of SSSD responder process is done with increasing delay.
Result: sssd_be process has now enough time to recover before a responder is restarted.