Recycling app pool each time something is published

Question

I'm working on an Umbraco site where I have custom sections, and therefore use the application.config and trees.config files.

I have a problem where every time I publish something, the app pool recycles with the following message:

w3wp.exe Information: 0 : 

_shutDownMessage=CONFIG change
HostingEnvironment initiated shutdown
CONFIG change
HostingEnvironment caused shutdown

_shutDownStack=   at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
   at System.Environment.get_StackTrace()
   at System.Web.Hosting.HostingEnvironment.InitiateShutdownInternal()
   at System.Web.HttpRuntime.ShutdownAppDomain(String stackTrace)
   at System.Web.HttpRuntime.OnConfigChange(String message)
   at System.Configuration.BaseConfigurationRecord.OnStreamChanged(String streamname)
   at System.Web.DirectoryMonitor.FireNotifications()
   at System.Web.Util.WorkItem.CallCallbackWithAssert(WorkItemCallback callback)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()

_shutdownReason=ConfigurationChange
    DateTime=2015-06-17T13:01:24.0413457Z

I have tried setting the "Disable Recycling for Configuration Changes" option to true, but without any change. I guess this i because the app pool no longer recycles, but the app-domain still does.

I have looked at this question, and even though the suggestions were good, it didn't help me. Recycling app pool each time a change has been made

I have some thoughts that it could be Umbraco that "writes" to application & trees.config as the timestamp on these are updated at the same time as I get the following message:

_shutdownReason=ConfigurationChange

As Eric Gaspard says it here at this issue "applications.config & trees.config cannot be Read-only?" umbraco opens these config files with write access. Maybe this could have some influence?

Additional info:

• Server is 2012

Bottomline, my question is:

Is there any way that I can either stop umbraco from touching the config files, or stop my app domain from recycling when the config files are changed?

Answer 1

There's an issue with frequent app pool recycles when you update files in App_Data frequently (which Umbraco does). A MS HotFix was posted for it this morning: see MS download here. It sounds like this might be the issue that you've been having.