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There are two domain event alarm types related to retry and back off. They are
As of NuoDB 2.2, these alarms are predefined for any domain. If you have done a rolling upgrade to NuoDB 2.2, you will have to explicitly define these alarms. See Defining Alarms.
EnforcerNodeBackoff alarm will trigger when enforcement notes that a process has shut down, but based on its back-off settings, does not restart the process. This alarm reports the uptime of the process, which will be less than
backoff.reqMinUptime, the time that enforcement will retry the policy again (
nextEnforcerTime), and the backoff (retry/fail) count.