Daemon loses __file__ reference after a while.

[Ian Kelly]

On Tue, Jul 24, 2012 at 8:59 AM, Dieter Maurer <dieter at handshake.de> wrote:
> "ivdneut at gmail.com" <ivdneut at gmail.com> writes:
>
>> I have a daemon process that runs for a considerable amount of time (weeks on end) without any problems. At some point I start getting the exception:
>>
>> Exception info: Traceback (most recent call last):
>>   File "scheduler.py", line 376, in applyrule
>>     result = execrule(rule_code)
>>   File "scheduler.py", line 521, in execrule
>>     rulepath = os.path.dirname(__file__)+"/"+'/'.join(rule['modules'])+"/"+rule['rulename']
>> NameError: name '__file__' is not defined
>>
>> This section of the code is executed in this process *all the time*, but suddenly stops working. I have been searching for similar issues online, but only come accross people having problems because they run the script interactively. This is not the case here.
>
> This is strange indeed.
>
> I have only one vague idea: should something try to terminate the
> process, modules would start to lose their variables during shutdown.

That's a good theory.  Or perhaps something in the code itself is
handling the module's globals() and very occasionally does something
that is incorrect and destructive.