title: Structure map throws Error code 202 exceptions unexpectedly
body: <p>So basically I am using structure map DI container. application type is ASP.NET MVC 4. I am registering the type mapping in the constructor of MvcApplication (global.asax), then I am using custom Controller factory to provide the types I need, but the thing is once in maybe 100-200 request the structure maps fails and throws exception saying <code>Exception Code: 202 No Default Instance defined for PluginFamily</code>. I have session state off so the multiple concurrent request are available for single user. One of my the page in my application is drawn dynamically, this page contains like 100-150 images which are return by one the actions in my application, so when that page is being loaded one or may be two pictures in 4-5 request fail to load. and the reason is that when I am retrieving types to path them to controller structure map throws exception at me saying there is no default type for <code>IMyService</code>. in every other place, I mean application, it seems to work perfectly. I am not registering type mappings in <code>Application_Start</code> because in the <code>MvcApplication</code> itself I need to retrieve some of those registered instances.</p>