C# app hangs randomly when called from Process.Start()

Question

I have a Windows service set up to manage custom .Net tasks. Organization is:

-Windows Service monitors a schedule and starts a worker .exe as needed.

-Worker .

Answer 1

I can't add a comment on your post yet (I'll be destroyed by other stackoverflow user for doing that but...)

I encounter a problem quite similar to yours. My problem was coming from the Session where the service is Started. During the migration, the service started in a "Session 0" in the new OS and not as a "system" program. It was issuing with the permission of our program to run through the service. Maybe you should check this point.

Sorry if I tell it as an answer and not in comment

Answer 2

Per last note, pulling the form bit out of it all together appears to have fixed the issue. At this point I'm assuming that server 2012 doesn't like something about a winform app not being displayed in certain situations; since it worked most of the time and nothing had changed in the form's code.

Service:

// Create a temp folder and copy the executable to it
// (so the source exe isn't always in use and can be swapped out)

Process p = new Process();
ProcessStartInfo psi = new ProcessStartInfo();
psi.FileName = Path.Combine(temp.Path, Path.GetFileName(ExecutablePath));
psi.Arguments = CommandLineArgs.ConcatenateList(" ");
psi.UseShellExecute = false;
psi.RedirectStandardError = true;
psi.RedirectStandardInput = true;
psi.RedirectStandardOutput = true;
psi.CreateNoWindow = true;
psi.ErrorDialog = false;
psi.WindowStyle = ProcessWindowStyle.Hidden;
p.StartInfo = psi;
p.Start();

// read standard output if necessary, kill and reschedule if appears to be frozen, etc.

Worker:

static class Program
{
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main()
    {
        Application.Run(new AppContext());
    }
}

class AppContext : ApplicationContext
{
    public AppContext()
    {
        // Do Stuff
    }
}