[pywin32-bugs] [ pywin32-Bugs-2906084 ] Windows service with logging module

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Bugs item #2906084, was opened at 2009-12-01 03:56
Message generated for change (Comment added) made by mhammond
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Category: None
Group: None
>Status: Closed
>Resolution: Invalid
Priority: 5
Private: No
Submitted By: jpiron (jpiron)
Assigned to: Nobody/Anonymous (nobody)
Summary: Windows service with logging module

Initial Comment:
Dears, 

When I try to use the logging module  in a script that is called by a general script intended to create a windows service that runs the script in a separated thread, I get an IOError: Bad file descriptor

For exemple, I have a script that polls a value and logs it every second. It runs flawlessly alone and in debug mode in a service. But once it is started normally. the log process is successfull several times (8 for exemple, and always 8) and the next time, the IOError is raised.

I ave tried with several handlers: RotatingFileHandler, FileHandler, and even StreamHandler, with different polling times, different numberd of successive writes and some other parameters.



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>Comment By: Mark Hammond (mhammond)
Date: 2009-12-01 10:18

Message:
Services do not have valid sys.stdout or sys.stderr objects.  As the
logging module uses these by default, it fails.  There is nothing suitable
python can provide instead of those handles, so the solution is to log to a
file.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=551954&aid=2906084&group_id=78018