[Twisted-Python] Bad file descriptor traceback when deamonnizing kqueue reactorwith twistd

[Werner Thie]

Hi

When I run the following command (as root) on FreeBSD all is well with

twistd -rpoll -o ftp

I get a running ftp server process on port 2121.

Everything is also up and running (no daemonizing) after

twistd -rkqueue -no ftp

Not so with (daemonized)

twistd -rkqueue -o ftp

The process dies with the attached traceback in twisted.log

Shall I file a ticket for this?

Thanks, Werner

2009-02-06 11:45:01+0100 [-] Log opened.
2009-02-06 11:45:01+0100 [-] twistd 8.2.0 (/usr/local/bin/python 2.5.2) 
starting up.
2009-02-06 11:45:01+0100 [-] reactor class: 
twisted.internet.kqreactor.KQueueReactor.
2009-02-06 11:45:01+0100 [-] twisted.protocols.ftp.FTPFactory starting 
on 2121
2009-02-06 11:45:01+0100 [-] Starting factory 
<twisted.protocols.ftp.FTPFactory instance at 0x803d7ff38>
2009-02-06 11:45:01+0100 [-] Traceback (most recent call last):
2009-02-06 11:45:01+0100 [-]   File "/usr/local/bin/twistd", line 21, in 
<module>
2009-02-06 11:45:01+0100 [-]     run()
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/scripts/twistd.py", line 
27, in run
2009-02-06 11:45:01+0100 [-]     app.run(runApp, ServerOptions)
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/application/app.py", 
line 694, in run
2009-02-06 11:45:01+0100 [-]     runApp(config)
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/scripts/twistd.py", line 
23, in runApp
2009-02-06 11:45:01+0100 [-]     _SomeApplicationRunner(config).run()
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/application/app.py", 
line 423, in run
2009-02-06 11:45:01+0100 [-]     self.postApplication()
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/scripts/_twistd_unix.py", 
line 206, in postApplication
2009-02-06 11:45:01+0100 [-]     self.startApplication(self.application)
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/scripts/_twistd_unix.py", 
line 311, in startApplication
2009-02-06 11:45:01+0100 [-] 
service.IService(application).privilegedStartService()
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/application/service.py", 
line 273, in privilegedStartService
2009-02-06 11:45:01+0100 [-]     service.privilegedStartService()
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/application/internet.py", 
line 85, in privilegedStartService
2009-02-06 11:45:01+0100 [-]     self._port = self._getPort()
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/application/internet.py", 
line 116, in _getPort
2009-02-06 11:45:01+0100 [-]     *self.args, **self.kwargs)
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/internet/posixbase.py", 
line 356, in listenTCP
2009-02-06 11:45:01+0100 [-]     p.startListening()
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/internet/tcp.py", line 
875, in startListening
2009-02-06 11:45:01+0100 [-]     self.startReading()
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/internet/abstract.py", 
line 262, in startReading
2009-02-06 11:45:01+0100 [-]     self.reactor.addReader(self)
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/internet/kqreactor.py", 
line 125, in addReader
2009-02-06 11:45:01+0100 [-]     self._updateRegistration(fd, 
EVFILT_READ, EV_ADD)
2009-02-06 11:45:01+0100 [-]   File 
"/usr/local/lib/python2.5/site-packages/twisted/internet/kqreactor.py", 
line 116, in _updateRegistration
2009-02-06 11:45:01+0100 [-]     self._kq.kevent([kevent(*args)], 0, 0)
2009-02-06 11:45:01+0100 [-] OSError: [Errno 9] Bad file descriptor