Re: [Py2exe-users] py2exe and Windows Service

[Jason Hiltz-L. <ja...@jy...>]

David Bolen <db3l.net <at> gmail.com> writes:

> Ah, I may have misinterpreted the type of error you were referring to.
> I assumed it was probably the StartServiceCtrlDispatcher error and not
> a Windows error.  If the service is failing to identify itself to
> Windows as it starts, then there's a good possibility that it's
> generating an exception at some point during initialization.
> 
> In your posted minimal example, I found that you have an unqualified
> CreateEvent call (that should be win32event.CreateEvent) in line 4 of
> __init__.  Note that you won't necessarily notice this in the "python
> MyService.py start" case since by default the win32 wrapper doesn't
> actually wait for the service to start, nor report failures.

Good catch :-) I fixed it.

> If I fix that, then your posted myservice seems to work fine for me,
> both as a script and built as an executable with py2exe.  This was
> with Python 2.5.1, and py2exe 0.6.6

Not for me. Sigh.

> First, verify that your service really does run as a normal script, since
> that's less effort to debug.  You can use a "debug" command line option
> to start up the service with normal stdout/stderr.

It does. Running with "debug" spits out everything with no issues.
 
> Next, try checking your event log after failing to start the service
> when built as binary.  If you're lucky, the exception information will
> be logged there with the event indicating that the service failed to
> start.

No luck there.

> If not, I just noticed that py2exe 0.6.6 supports selecting command
> line parsing styles, and you can switch it to using the same pywin32
> command line handler as when the script runs directly.  This buys you
> the same "debug" option that runs with stdout/stderr connected.  You
> want a service argument to your setup() call like:
> 
>     setup(...,
>           service = [{'modules': ['myservice'],
>                       'cmdline_style': 'pywin32'}],
>           ...)
> 
> Then you'll be able to run "service_executable debug" manually, and
> hopefully you'll see the error when it tries to start up.

This is what triggered the solution to the issue. I looked at my setup.py again
and I was telling py2exe to build it as a *console* app!!! No kidding it worked
fine everywhere except in service mode!

After modifying my setup to use service and point it to the right module,
everything appears to work like a charm. I feel like such a bonehead...

Thanks for all the help and great explanations/suggestions David. If you hadn't
been so thorough, I probably just would have given up on this whole thing out of
frustration.

Thanks again!

Cheers,
Jason