NullReferenceException on ServiceStack.ServiceStackHost.Release(Object instance)

[lucas-rvezy]

We are getting the exception below that do not give us much information on what is causing it.

System.NullReferenceException: Object reference not set to an instance of an object.
   at ServiceStack.ServiceStackHost.Release(Object instance) in /home/runner/work/ServiceStack/ServiceStack/ServiceStack/src/ServiceStack/ServiceStackHost.cs:line 1408

It is just ignoring all the request logs we added and we couldn't find the cause of it. We couldn't replicate it locally. It only throw this exception on production.

[mythz]

The exception says the NRE happens here:

https://github.com/ServiceStack/ServiceStack/blob/main/ServiceStack/src/ServiceStack/ServiceStackHost.cs#L1408

The only reason why Container would be null would be after the AppHost.Dispose() is called when the App is shutting down.