Scheduler is not working

[Cloudmersive]

I tried making a scheduler in .NET Core 2.1 running on Windows Server 2016 with IIS, but unfortunately doesn't work. Here is the code:

services.AddScheduler(scheduler =>
            {
                scheduler.Schedule(
                    () =>
                    {
                        // Makes API Call
                    }
                )
                .EveryMinute();
            }

Expected: Works and calls API

Actual: Doesn't do anything

[jamesmh]

I believe in IIS (using the reverse kestrel proxy module) the .Net core application doesn't actually "start" until the first http request comes in. So if you have no http requests that are hit (i.e. you are just trying to use the scheduler), it might be why your asp .net core app hasn't started yet.

Sounds like maybe you want to do this by building a console app or windows service?

I'm planning on adding some docs for these scenarios in the future.

Let me know if this helps!

[jamesmh]

Here's the link describing what I had just said.

Because ASP.NET Core apps run in a process separate from the IIS worker process, the module also handles process management. The module starts the process for the ASP.NET Core app when the first request arrives and restarts the app if it crashes.

[jamesmh]

Closing - let me know if you need further aid.

[Cloudmersive]

This was helpful, thanks

[lzinga]

@jamesmh I have tried some different cases with this such as https://www.taithienbo.com/how-to-auto-start-and-keep-an-asp-net-core-web-application-and-keep-it-running-on-iis/ but I am still getting issues. The scheduler doesn't seem to run even though the IIS site should be running and not time out to always be open and running.

[jamesmh]

No idea. What version of .NET Core, Coravel and IIS are you running?

Is this inproc or outofprocess hosting method?

[lzinga]

.NET Core - 2.2
Coravel - 2.5.1 (although just upgraded to 2.6.0 today, not sure if this would contain an update for this issue)
IIS - 8.5.9600.16384

This is indeed using hostingModel="inprocess". I have it log to a database when the IInvocable are registered and when the scheduled tasks run.

It is supposed to run every day at noon (although apparently noon is at 5 AM, but I think thats just something on my end). On 7/26 it registered it but didn't run it in the morning even though it was running since the day before. Then on 7/27 it ran all the scheduled tasks, then completely skips 7/28. Then finally on 7/29 it didn't run the tasks but registered the tasks after the scheduled time (I assume when someone visited the site at that time.)

[jamesmh]

Sounds like IIS isn't using the "always running" option?

Try out this -> https://www.nickedeye.com/iis-keep-website-alive-always-running/

Let me know 👍

[alizorlu]

Hii,

I just got this error.
when i noticed i realized i didn't add dependency injection .

Now, add that
services.AddScheduler();