Mailing List Archive: Zope: Users

FTP server problem

Index | Next | Previous | View Threaded

gareth at upfrontsystems

Mar 23, 2009, 3:27 AM

Post #1 of 2 (796 views)
Permalink

FTP server problem

Hello,

I'm experiencing a strange problem. I've enabled FTP access to my Zope
instance, but when I try and login it throws an exception:

2009-03-23T11:14:42 INFO ZServer Successful login.
------
2009-03-23T11:15:07 ERROR ZServer uncaptured python exception, closing
channel <ZServer.FTPServer.zope_ftp_channel connected 196.*.*.*:48336 at
0x2a9c0ecd40> (exceptions.AttributeError:'NoneType' object has no
attribute '_fileno'
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|read|69]
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|handle_read_event|391]
[/home/zope/Python-2.4.4/lib/python2.4/asynchat.py|handle_read|89]
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|recv|347]
[/home/zope/Python-2.4.4/lib/python2.4/asynchat.py|handle_close|156]
[/home/zope/instances/www.emss.co.za/parts/zope2/lib/python/ZServer/medusa/ftp_server.py|close|181]
[/home/zope/instances/www.emss.co.za/parts/zope2/lib/python/ZServer/medusa/ftp_server.py|close|906]
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|close|360]
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|del_channel|248]
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|__getattr__|366])

I thought it may be a Plone permissions problem as I was using a Plone
user account, but even as the Zope admin user it throws the above error.
Passive mode throws the exception. Active mode doesn't throw an error,
but doesn't show a directory listing either.

Zope version: Zope 2.10.6-final
OS: Debian Sarge
FTP clients used: FileZilla, standard Linux FTP client and Firefox (as a
last resort).

Regards,
Gareth Allen

_______________________________________________
Zope maillist - Zope [at] zope
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )

dieter at handshake

Mar 25, 2009, 1:30 PM

Post #2 of 2 (693 views)
Permalink

Re: FTP server problem [In reply to]

Gareth Allen wrote at 2009-3-23 12:27 +0200:
>I'm experiencing a strange problem. I've enabled FTP access to my Zope
>instance, but when I try and login it throws an exception:
>
>2009-03-23T11:14:42 INFO ZServer Successful login.
>------
>2009-03-23T11:15:07 ERROR ZServer uncaptured python exception, closing
>channel <ZServer.FTPServer.zope_ftp_channel connected 196.*.*.*:48336 at
>0x2a9c0ecd40> (exceptions.AttributeError:'NoneType' object has no
>attribute '_fileno'

Looks like the FTP server implementation is broken.

>[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|read|69]
>[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|handle_read_event|391]
>[/home/zope/Python-2.4.4/lib/python2.4/asynchat.py|handle_read|89]
>[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|recv|347]
>[/home/zope/Python-2.4.4/lib/python2.4/asynchat.py|handle_close|156]
>[/home/zope/instances/www.emss.co.za/parts/zope2/lib/python/ZServer/medusa/ftp_server.py|close|181]
>[/home/zope/instances/www.emss.co.za/parts/zope2/lib/python/ZServer/medusa/ftp_server.py|close|906]
>[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|close|360]
>[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|del_channel|248]
>[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|__getattr__|366])

The problem is probably in "...ZServer/medusa/ftp_server.py|close".
I expect that the order of things is not right or that something redundant
is done.

A ZServer puts a channel object into 'asyncore's service map.
Each element in this map must have a 'fileno' method that tells
'asyncore' which file number is associated.

The exception above happens during closing the channel.
"ftp_server.close" probably calls the channel's 'close' which
calls 'del_channel' which accesses an object that meanwhile in "None"
while it is still expected to be an object with a '_fileno' attribute.

--
Dieter
_______________________________________________
Zope maillist - Zope [at] zope
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )

Index | Next | Previous | View Threaded

Interested in having your list archived? Contact Gossamer Threads