[Python-bugs-list] [ python-Bugs-837231 ] Python 2.3 socketmodule breaks on FreeBSD 5.1

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Bugs item #837231, was opened at 2003-11-07 02:03
Message generated for change (Comment added) made by anthonybaxter
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Category: Extension Modules
Group: Python 2.3
Status: Open
Resolution: None
Priority: 7
Submitted By: Maximillian Dornseif (mdornseif)
Assigned to: Nobody/Anonymous (nobody)
Summary: Python 2.3 socketmodule breaks on FreeBSD 5.1

Initial Comment:
Every outbound socket created leaves a KQUEUE entry in the 
filetable which leads to a "out of ffiledescriport" problem dor 
long running programs or ones that do many connections.

I can reproduce this behaviour with Python 2.3 and 2.3.2 on 
FreeBSD 5.1. I have also tested 2.2.3 on FreeBSD 5.1 and 
2.3.2 on FreeBSD 4.9 which all were running fine.

Example:

import socket

def test():
    s = socket.socket()
    s.connect(('koeln.ccc.de', 80))
    s.send('GET / HTTP/1.1\r\nHost: koeln.ccc.de\r\n\r\n')
    # I know, I get only len(MTU)
    s.recv(30000)
    s.shutdown(2)
    s.close()
    del s

for i in range (500):
    test()


While running this I see about 500 times following lines in 
lsof:

python  82229   md    7u  KQUEUE 0xc7d76e00                  
count=0, state=0

Some more documentation on my tests can be found at 
http://blogs.23.nu/c0re/stories/1626/



 

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>Comment By: Anthony Baxter (anthonybaxter)
Date: 2003-11-07 02:25

Message:
Logged In: YES 
user_id=29957

If you strip the test down further, which bits are necessary
for the leak? Is the full
socket()/connect()/send()/recv()/shutdown()/close() set
needed? What about just socket()/connect()/close() ? Or just
creating and del of the  sockets?


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