Bugs item #1708538, was opened at 2007-04-27 07:30 Message generated for change (Comment added) made by vsajip You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1708538&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Library Group: Python 2.5 >Status: Closed >Resolution: Invalid Priority: 5 Private: No Submitted By: Florian Schmidt (fastflo) Assigned to: Vinay Sajip (vsajip) Summary: TimedRotatingFileHandler's doRollover opens file in "w" mode Initial Comment: if TimedRotatingFileHandler does an doRollover() it opens the new file hardcoded with mode "w" whilst the baseclass FileHandler opens it with mode "a" if nothing else is specified in the constructor. it should use the same default behavior as FileHandler and/or give a way to specify another open-mode. if multiple processes write to the same file, and one does the RollOver all other newly spawned processes write to the end of the new file but the still running first process who did the rollover will write from the beginning of the file - overwriting log entries from the other procs... ---------------------------------------------------------------------- >Comment By: Vinay Sajip (vsajip) Date: 2007-04-28 12:50 Message: Logged In: YES user_id=308438 Originator: NO Since there is no interprocess synchronisation in Python, writing to the same logging file from multiple processes is not supported. If you want output from multiple processes to end up in the same file, have all your processes send logging events to a SocketHandler, and set up a separate socket receiver (which could be in one of the processes) to receive the events and log to file. A working example is given here: http://docs.python.org/lib/network-logging.html Note that even if the system was changed to use 'a' rather than 'w', this would not eliminate potential problems with e.g. data in unflushed buffers, etc. ---------------------------------------------------------------------- Comment By: Neal Norwitz (nnorwitz) Date: 2007-04-28 01:40 Message: Logged In: YES user_id=33168 Originator: NO This sounds like a logging module issue. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1708538&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
