Bugs item #1092502, was opened at 2004-12-28 21:09 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1092502&group_id=5470
Category: Python Library Group: Platform-specific Status: Open Resolution: None Priority: 5 Submitted By: bacchusrx (bacchusrx) Assigned to: Nobody/Anonymous (nobody) Summary: Memory leak in socket.py on Mac OS X 10.3 Initial Comment: Some part of socket.py leaks memory on Mac OS X 10.3 (both with the python 2.3 that ships with the OS and with python 2.4). I encountered the problem in John Goerzen's offlineimap. Transfers of messages over a certain size would cause the program to bail with malloc errors, eg *** malloc: vm_allocate(size=5459968) failed (error code=3) *** malloc[13730]: error: Can't allocate region Inspecting the process as it runs shows that python's total memory size grows wildly during such transfers. The bug manifests in _fileobject.read() in socket.py. You can replicate the problem easily using the attached example with "nc -l -p 9330 < /dev/zero" running on some some remote host. The way _fileobject.read() is written, socket.recv is called with the larger of the minimum rbuf size or whatever's left to be read. Whatever is received is then appended to a buffer which is joined and returned at the end of function. It looks like each time through the loop, space for recv_size is allocated but not freed, so if the loop runs for enough iterations, python exhausts the memory available to it. You can sidestep the condition if recv_size is small (like _fileobject.default_bufsize small). I can't replicate this problem with python 2.3 on FreeBSD 4.9 or FreeBSD 5.2, nor on Mac OS X 10.3 if the logic from _fileobject.read() is re-written in Perl (for example). ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1092502&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
