[Mailman-Users] cron errors & corrupt config.pck.last

[Tim Flight]

Hello, I'm new at mailman so sorry if this is routine. I've searched 
and found others who had the same problem, but no solution. I'm running 
the default mailman install (2.1.2) on Mac OS X Server 10.3.7.

Once every few days I get the following email sent to me from my server:

+--------------------+
  From: user at host (Cron Daemon)
  Date: December 29, 2004 9:00:01 AM EST
  To: user at host
  Subject: Cron <mailman at host> /usr/bin/python -S 
/usr/share/mailman/cron/disabled

Traceback (most recent call last):
  File "/usr/share/mailman/cron/disabled", line 209, in ?
  main()
  File "/usr/share/mailman/cron/disabled", line 202, in main
  mlist.Save()
  File "/usr/share/mailman/Mailman/MailList.py", line 515, in Save
  self.__save(dict)
  File "/usr/share/mailman/Mailman/MailList.py", line 487, in __save
  os.unlink(fname_last)
  OSError: [Errno 22] Invalid argument: 
'/private/var/mailman/lists/listname/config.pck.last'
  +--------------------+

And the following information appears in my system log at the same 
time. It normally repeats itself a few times.

+--------------------+
  Dec 29 09:00:09 2004 (362) Traceback (most recent call last):
  File "/usr/share/mailman/Mailman/Queue/Runner.py", line 105, in 
_oneloop
  self._onefile(msg, msgdata)
  File "/usr/share/mailman/Mailman/Queue/Runner.py", line 155, in 
_onefile
  keepqueued = self._dispose(mlist, msg, msgdata)
  File "/usr/share/mailman/Mailman/Queue/IncomingRunner.py", line 133, 
in _dispose
  mlist.Save()
  File "/usr/share/mailman/Mailman/MailList.py", line 515, in Save
  self.__save(dict)
  File "/usr/share/mailman/Mailman/MailList.py", line 487, in __save
  os.unlink(fname_last)
  OSError: [Errno 22] Invalid argument: 
'/private/var/mailman/lists/listname/config.pck.last'

Dec 29 09:00:09 2004 (362) SHUNTING: 
1104328808.746958+91cc991ae5e0f3557708745b0acf8615bb3b2455
  +--------------------+

Through much research into the problem I've figured out how to *fix* 
the problem, but not how to prevent it from happening again. It seems 
to happen about once or twice per week.

The /private/var/mailman/lists/listname/config.pck.last file becomes 
corrupt. So corrupt that even "sudo rm config.pck.last" won't get rid 
of it. However "sudo mv config.pck.last config.pck.last.old; sudo rm 
config.pck.last.old" will get rid of the corrupt file. Then I restart 
mailman and everything is fine for a few days.

Anybody have any clue what is causing the config.pck.last file to 
become corrupt?