Azure上的C＃MVC应用程序：新部署时站点工作正常，但闲置后失败

Question

I have spent a good bit of time researching this but have not found anybody else reporting the issue that I am having.

I deploy my site and everything is good. I share the link with my QA and UI peeps and everything works for them. But if the site goes for a period of time, such as overnight, without being accessed then the web application is unable to start and reports "Method 'get_CurrentUser' in type ... does not have an implementation." Stopping and restarting the site does not resolve the issue but if I simply re-upload the main .dll file (the exact same version of the .dll) to the site then everything works fine again. For a while, at any rate.

Why would it be okay when newly published but fail after sitting for some time? Any suggestions on troubleshooting this would be greatly appreciated.

Answer 1

IIS has introduced Suspend action for idle timeout, when site is idle for specified duration, IIS will suspend process, god knows what happens exactly but looks like it just hibernates the process. And waking up may not work, so you can change this action to terminate for idle timeout.

Second option is to keep site awake by using pingdom or site24x7 services.

Answer 2

Could it help to try Azure Web App and set Always On? http://azure.microsoft.com/updates/azure-web-sites-adds-always-on/

Answer 3

It looks like I found a solution.

The app start event in global.asax included "var assemblies = System.Web.Compilation.BuildManager.GetReferencedAssemblies();" in order to make sure that everything loads, but that line was -after- the call that was triggering all of the dependency registration. I cut/pasted that line so that it happens first and the site came up fine when I tried it this morning.