Determine What made Web-Application Shutdown

Hi,

Here in this post I’ll summarize the details of this approach.

There are multiple reasons of auto shutdown of the Web Application.

· Web.config file change, a

· Global.asax change

· App_code directory change

· A directory delete change

· Max-num-compilations reached quota.

· \bin directory change etc.

Now to identify which of the above made the application shutdown, use the below snippet.

void Application_End(object sender, EventArgs e)

{

// Code that runs on application shutdown

HttpRuntime runtime = (HttpRuntime)typeof(System.Web.HttpRuntime).InvokeMember("_theRuntime", BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.GetField, null, null, null);

if (runtime == null)

{

return;

}

string shutDownMessage = (string)runtime.GetType().InvokeMember("_shutDownMessage",BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField,null,runtime,null);

string shutDownStack = (string)runtime.GetType().InvokeMember("_shutDownStack",BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField,null,runtime,null);

if (!EventLog.SourceExists(".NET Runtime"))

{

EventLog.CreateEventSource(".NET Runtime", "Application");

}

EventLog log = new EventLog();

log.Source = ".NET Runtime";

log.WriteEntry(String.Format("\r\n\r\n_shutDownMessage={0}\r\n\r\n_shutDownStack={1}",shutDownMessage,shutDownStack), EventLogEntryType.Error);

}

Now run the application and try to make changes in two files one by one respectively – Web.config and File under App_Code directory.

When the changes are made respectively, these will make the application shut down. This causes makes below logging in the Event Log under ‘Application’ Event Viewer.

_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.Hosting.HostingEnvironment.InitiateShutdown()

at System.Web.HttpRuntime.ShutdownAppDomain(String stackTrace)

at System.Web.Configuration.HttpConfigurationSystem.OnConfigurationChanged(Object sender, InternalConfigEventArgs e)

at System.Configuration.Internal.InternalConfigRoot.OnConfigChanged(InternalConfigEventArgs e)

at System.Configuration.BaseConfigurationRecord.OnStreamChanged(String streamname)

at System.Web.Configuration.WebConfigurationHostFileChange.OnFileChanged(Object sender, FileChangeEvent e)

at System.Web.DirectoryMonitor.FireNotifications()

at System.Web.Util.WorkItem.CallCallbackWithAssert(WorkItemCallback callback)

at System.Web.Util.WorkItem.OnQueueUserWorkItemCompletion(Object state)

at System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)

at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state).

_shutDownMessage=Change Notification for critical directories.