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POMVC Multiple AJAX Requests with Entity Framework causes error
 

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    <p>I have two jqGrids that load data via an ajax POST call to my controller and each time I run the application, only one of the two POSTs executes successfully. Normally, if i hit refresh on the browser, both grids will load correctly. But consistently 1 of the 2 fail on first load of each view ( i have two views/pages that each have 2 jqGrids, "dashboard style"). In log4net logs the two requests have different threads and one always fails while the other succeeds but which one succeeds is random (probably first-come, first-serve)... Sometimes i get a null reference error when it tries to iterate through a resulting enumerable list of items, other times i get "The connection was not closed. The connection's current state is connecting."</p> <p>I have some suspicions of what might be the cause of this: EF lazy loading/proxies enabled, bad windsor configuration, automapper error that is not being thrown or shown in stack trace. But since i really have no clue, below is my setup in case it helps decipher this one. </p> <p><strong>Persistence</strong> [LifestyleSingleton] - This holds the EF4 datacontext (code-first) and a reference to EF4.3. There's a factory for creating the Context called GetContext() and this factory implements IDisposable.<br> <strong>Repo</strong> [LifestylePerWebRequest] - This holds repositories implementing the repository and specification pattern (http://huyrua.wordpress.com/2010/07/13/entity-framework-4-poco-repository-and-specification-pattern/).<br> <strong>Services</strong> [LifestylePerWebRequest] - Calls onto repo and applies bus logic, i.e. returns PagedList objects for UI paging.<br> <strong>Controllers</strong> [LifestyleTransient] - mvc controllers, make use of automapper for mapping to view model types.<br> <strong>MVC UI</strong> - I'm implementing Lib.Web.MVC which creates a strongly-typed wrapper for jqGrid. And from here, I use windsor container to do DI. </p> <p>UPDATE: I changed all components to register with LifestylePerThread and all of the errors seem to have been resolved with this. However, I do not understand why.. I'm new to DI so I'm sure i'm missing something. <strong>Could someone please explain why this has solved the issue?</strong> And what will this change do as far as scalability...? I figured I'd want the context factory along with the context itself to be registered as singleton's but that obviously wasn't correct. </p>
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