Ninject WebApi Issue within MVC App

Question

I currently have a working MVC 5 application which uses Ninject for dependency injection. I am now taksed with adding some Web API controllers to this project, and I want to use dependency injection within them.

I have read a couple of blog posts and understand that the WebApi DI mechinism is different to that of the MVC mechinism.

To this end I created a new DependencyResolver for use with the WebApi, as shown here:

public class NinjectWebApiDependencyResolver : NinjectDependencyScope,
    System.Web.Http.Dependencies.IDependencyResolver
    {
        private readonly IKernel _kernel;

        public NinjectWebApiDependencyResolver(IKernel kernel)
            : base(kernel)
        {
            this._kernel = kernel;
        }

        public IDependencyScope BeginScope()
        {
            return new NinjectDependencyScope(_kernel.BeginBlock());
        }
    }

My MVC DependencyResolver is shown below:

public class NinjectMvcDependencyResolver : NinjectDependencyScope,
    System.Web.Mvc.IDependencyResolver
    {
        #region Fields

        private readonly IKernel kernel;

        #endregion

        #region Constructors and Destructors

        public NinjectMvcDependencyResolver(IKernel kernel)
            : base(kernel)
        {
            this.kernel = kernel;
        }

        #endregion

        #region Public Methods and Operators

        public IDependencyScope BeginScope()
        {
            return new NinjectDependencyScope(kernel.BeginBlock());
        }

        #endregion
    }

I register the two resolvers in my NinjectWebCommon.cs with the following code:

var resolver = new NinjectMvcDependencyResolver(kernel);

// Install into the MVC dependency resolver
DependencyResolver.SetResolver(resolver);

// Install the WebApi Dependency resolver
GlobalConfiguration.Configuration.DependencyResolver = new NinjectWebApiDependencyResolver(kernel);

This all seems to work fine, on the first request to a Api controller, DI works, however on subsequent calls, it fails with the error:

An exception of type 'System.InvalidOperationException' occurred in Ninject.dll but was not handled in user code

Additional information: Error loading Ninject component ICache

No such component has been registered in the kernel's component container.



Suggestions:

  1) If you have created a custom subclass for KernelBase, ensure that you have properly

     implemented the AddComponents() method.

  2) Ensure that you have not removed the component from the container via a call to RemoveAll().

  3) Ensure you have not accidentally created more than one kernel.

Anyone have any ideas why? I know that none of the reasons above are the reason for the failure.

PS: I have looked at the following solution and it does not work for me either: Share a Kernel between WebAPI and MVC