ftp_server memory error

[Ferdinand]

branch-server 1902
branch-addons official 2580

although this service is actually NOT accessed by anyone this error occured - restart necesary

Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib64/python2.5/threading.py", line 486, in __bootstrap_inner
    self.run()
  File "/home/terp/OpenERP/branch/server/5.0/bin/addons/document/ftpserver/__init__.py", line 93, in run
    ftpd.serve_forever()
  File "/home/terp/OpenERP/branch/server/5.0/bin/addons/document/ftpserver/ftpserver.py", line 3001, in serve_forever
    asyncore.loop(timeout=1.0, use_poll=False)
  File "/usr/lib64/python2.5/asyncore.py", line 191, in loop
    poll_fun(timeout, map)
  File "/usr/lib64/python2.5/asyncore.py", line 116, in poll
    e.append(fd)
MemoryError

[Jay Vora (Serpent Consulting Services) (jayvora)]

Can you please write the steps to reproduce the error?
Thanks.

[Amit Parik (amit-parik)]

Can you please write the steps to reproduce the error. So i can proceed further in this bug. Hope you will cooperate with this.

Thanks.

[xrg (xrg)]

On Friday 31 December 2010, you wrote:
> Can you please write the steps to reproduce the error. So i can proceed
> further in this bug. Hope you will cooperate with this.
>
> Thanks.

Note: if that's a MemoryError[1], it may be caused by *any* memory leaks
within the python process (the server). And then, the memory error will just
appear at a random trace. In the code you mentioned, the "e" variable should
just need a few bytes, so it's highly unlikely that the poll() function
received bad arguments.

Although, I believe that FTP (in the v5.x series) suffers from heavy memory
usage itself, because it tries to load the whole data chunk in memory before
sending it. That, /may/ be linked to the MemoryError, but we cannot be sure it
is the real cause.
This has been improved in v6.0, for FTP and WebDAV (still, not for RPC
transfers of files). It is an API design issue so it _cannot_ be backported to
v5.0 .

[1]
http://docs.python.org/library/exceptions.html?highlight=memoryerror#exceptions.MemoryError

[Amit Parik (amit-parik)]

Hello DR Ferdinand,

Let's close this bug, for the sake of clarity in Launchpad. If you still face the same problem, then you can reopen this.

Thanks.