From bojemoi at gmail.com  Tue Nov  1 09:47:33 2016
From: bojemoi at gmail.com (Dan Cohen)
Date: Tue, 1 Nov 2016 15:47:33 +0200
Subject: [python-win32] Possible leak in the win32evtlog module when using
 EvtSubscribe
Message-ID: <CAECL088=5-faBNFeLY3cP_fFYduftP4iBK-1hRLEF9aW9Ua5kA@mail.gmail.com>

Good day,

I have been using the win32evtlog.EvtSubscribe function to subscribe for
changes in the event log and saw that under a stress of event logs being
generated, the memory of the Python process increases significantly and
never goes back. I have removed all of the code in my callback so I'm doing
nothing in the callback and still seeing what seems to be a significant
memory leak (Increasing quickly to many MBs)

All I'm doing is :

def my_event_handler():
     pass

subscription = win32evtlog.EvtSubscribe('Security',
win32evtlog.EvtSubscribeToFutureEvents,
\
                    None, Callback=my_event_handler, Context=None,
Query=None)

And then in another process creating tons of event logs by doing :

while True:
    x = win32security.LogonUser("Dan Cohen","", "XXXXX",3,0)
    x = None

Which creates a lot of event logs of type user logon.

The installed version is 219 which seems to be the most recent.

Would very much appreciate your help,
Dany
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