hangfire service update and maintenance

[linadys]

I have a question. When I need to update some task logic, I have to stop the service, which might cause the running tasks to be interrupted. When I restart the service, this task will run repeatedly. Is there a way to do a hot update? Or, first suspend the task and enter the queue. After completing the processing of the running task, stop the service.

[odinserj]

After shutdown is initiated and acknowledged by Hangfire, no new background jobs will be fetched from the queue. As for graceful shutdown, you can configure BackgroundJobServerOptions.StopTimeout, which defines how much time give for running jobs to complete after shutdown is initiated. By default it's zero, but can be configured to give more time. Cancellation tokens passed to a method will not be fired until this timeout is elapsed.

Please note that the BackgroundJobServerOptions.ShutdownTimeout option must be larger than the configured StopTimeout, because otherwise application will be allowed to be stopped once ShutdownTimeout is elapsed. Also, ASP.NET Core's IHostOptions.ShutdownTimeout should be larger than both of these two, because otherwise ASP.NET Core application will be stopped before waiting for shutdown, please see https://andrewlock.net/extending-the-shutdown-timeout-setting-to-ensure-graceful-ihostedservice-shutdown/ for details.