Question

I have a Windows Service that I am trying to debug. Now it fails to start even though the current code used to work. The error is:

Windows could not start the MyService service on Local Computer

Error 1053: The service did not respond to the start or control
request in a timely fashion.

To isolate the error, I tried to comment out everything. The main method looks like this:

TextWriter tt = new StreamWriter(@"C:\startup.text", true);
tt.WriteLine("Starting up the service");
tt.Close();

ServiceBase[] ServicesToRun;
ServicesToRun = new ServiceBase[] 
   { 
       new MyService()
   };

TextWriter tt2 = new StreamWriter(@"C:\startup.text", true);
tt2.WriteLine("Run...");
tt2.Close();

It prints out both “Starting up the service” and “Run…” to the log file. I also stripped the inside of MyService so it’s empty. There is a try/catch around any code, which now is reduced to some log lines like above. I never enters the catch statement, which would have logged it.

Everything in OnStart has been commented out:

protected override void OnStart(string[] args)
{
}

So I’m basically out of ideas. I thought the error was because the Start method never finishes (or doesn’t within 30 seconds). Is there some other method that is called? Any ideas are appreciated.

Extra info: The constructor in MyService is empty. If I insert some Thread.Sleep(5000) lines, then it takes longer beofre the error message about Error 1053 pops up. The Main method seems to have to exit (without error).

Answer 1

You are missing ServiceBase.Run call:

ServiceBase[] servicesToRun = new ServiceBase[]
                                { 
                                    new MyService() 
                                };
ServiceBase.Run(servicesToRun);

It might also be a good idea to subscribe to unhandled exceptions notification:

static void Main() {
    ...
    AppDomain.CurrentDomain.UnhandledException 
                                      += CurrentDomain_UnhandledException;
    ...
}

private static void CurrentDomain_UnhandledException(
                                                 Object sender, 
                                                 UnhandledExceptionEventArgs e) {

    if (e != null && e.ExceptionObject != null) {
        // log exception:
    }
}

And add following try/catch to OnStart because .NET/SCM swallows exceptions:

protected override void OnStart(String[] args) {
    try {

    } catch(Exception e) {
        // log exception:
        throw;
    }
}