[1.9.1] A tenant could not be started & null exception

[I3undy]

Xeevis created on Jul 10, 2015:
https://combinator.codeplex.com/workitem/76

On Orchard 1.9.1 with latest commits of both Combinator (f9afb20278e8) & Helpful Libraries (1d415cb8fb4b), when Combinator is enabled I get constantly "A tenant could not be started" error.

Very simple steps

1. Fresh install of Orchard 1.9.1

2. Enable Combinator

3. Same error logged on every app start (every time app is restarted and frontend page refreshed)

   2015-07-10 17:37:52,953 [6] Orchard.Environment.DefaultOrchardHost - (null) - A tenant could not be started: Default
   (null)
   Autofac.Core.DependencyResolutionException: An exception was thrown while executing a resolve operation. See the InnerException for details. ---> Object reference not set to an instance of an object. (See inner exception for details.) ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Orchard.Environment.WorkContextAccessor.HttpContextScopeImplementation..ctor(IEnumerable1 events, ILifetimeScope lifetimeScope, HttpContextBase httpContext, Object workContextKey) in z:\Builds\work\9f6cd39ff0f68f41\src\Orchard\Environment\WorkContextAccessor.cs:line 88 at Orchard.Environment.WorkContextAccessor.CreateWorkContextScope(HttpContextBase httpContext) in z:\Builds\work\9f6cd39ff0f68f41\src\Orchard\Environment\WorkContextAccessor.cs:line 49 at Orchard.Mvc.MvcModule.HttpContextBaseFactory(IComponentContext context) in z:\Builds\work\9f6cd39ff0f68f41\src\Orchard\Mvc\MvcModule.cs:line 54 at Orchard.Mvc.MvcModule.RequestContextFactory(IComponentContext context) in z:\Builds\work\9f6cd39ff0f68f41\src\Orchard\Mvc\MvcModule.cs:line 80 at Autofac.RegistrationExtensions.<>c__DisplayClass101.b__f(IComponentContext c, IEnumerable`1 p)

If combinator is disabled, error is no longer produced. I'm not observing any disruption in service, only the log entry.

[I3undy]

@Piedone commented on Jul 10, 2015:

This suspiciously looks like a new 1.9.1 bug, see: OrchardCMS/Orchard#5490

[I3undy]

PacmanDave commented on Jul 30, 2015:

I am running into the same thing. However, it isn't just in the logs, but also causes a YSOD until I disable Combinator. I was not seeing this issue with the latest version of combinator until I updated to the latest version of Orchard. Therefore, it is definitely something that broke in the core.

[I3undy]

Xeevis commented on Aug 28, 2015:

@Piedone you were right, issue appears to be fixed in both 1.9.x and dev branches of Orchard now.