Question

I have a service that is started using a start routine surrounded by a try catch block as below.

    protected override void OnStart(string[] args)
    {
        try
        {
            Program.Start();
        }
        catch (Exception e)
        {
            Logger.Error("Exception during Service Start");
        }
    }

Occasionally on some machines (1/100) it will occasionally print out the last line of Program.Start (a log message) and then fail with no log messages or event log messages. Should this be possible?

Thanks

EDIT: The service does kick off a few other threads but they are encapsulated in the same manner

EDIT: The Logger is a wrapper for log4net – it’s working very reliably on a lot (100+) of machines (though yes it possibly the cause)

Answer 1

The service could crash if an exception is thrown out of a started thread but not caught.

Are you adding a handler to each app domain unhandled exception?

eg:

  AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler( CurrentDomain_UnhandledException );

EDIT
Also, you have the Application.ThreadException event which i forgot to mention:
http://msdn.microsoft.com/en-us/library/system.windows.forms.application.threadexception.aspx