Application Server Failover
If the application server terminates abruptly, external systems will not be affected due to the use of messaging and once the system is reachable again, any workflows that were running at the time of crashing will restart from the last known state.
In case of a graceful shutdown of the application server, the current activity of the running workflow will be completed and the application will then shutdown. When the application server is restarted, the workflow will resume processing normally from the point they were suspended at shutdown time.
Single Application Server Instance
If the application has a single application server instance, failover is provided - after the application server instance is restarted or is available again, workflows continue normal processing from the point they were suspended at the time of shutdown.