On Sun, Mar 3, 2013 at 1:21 PM, Alec Matusis <matu...@yahoo.com> wrote:
> I had 60 busy tcp servers that ran on Python 2.6/Twisted 10.0 (or Twisted
> 9.0) for over two years with not problems. After I upgraded to Twisted
> 12.3/Python 2.7, I started getting the errors below (no application code
> changes). It took about two days for the first error to appear on a busy
> server under heavy load:
>
> [twisted.internet.protocol.ServerFactory] Unhandled Error
> Traceback (most recent call last):
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/python/lo
> g.py", line 73, in callWithCon
> text
> return context.call({ILogContext: newCtx}, func, *args, **kw)
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/python/co
> ntext.py", line 118, in callWi
> thContext
> return self.currentContext().callWithContext(ctx, func, *args,
> **kw)
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/python/co
> ntext.py", line 81, in callWit
> hContext
> return func(*args,**kw)
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/internet/
> posixbase.py", line 614, in _d
> oReadOrWrite
> why = selectable.doRead()
> --- <exception caught here> ---
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/internet/
> tcp.py", line 1069, in doRead
> transport = self.transport(skt, protocol, addr, self, s,
> self.reactor)
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/internet/
> tcp.py", line 786, in __init__
> self.startReading()
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/internet/
> abstract.py", line 429, in sta
> rtReading
> self.reactor.addReader(self)
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/internet/
> epollreactor.py", line 256, in
> addReader
> _epoll.EPOLLIN, _epoll.EPOLLOUT)
> File
>
> "/usr/local/encap/Python-2.7.3/lib/python2.7/site-packages/twisted/internet/
> epollreactor.py", line 240, in
> _add
> self._poller.modify(fd, flags)
> exceptions.IOError: [Errno 2] No such file or directory
>
>
> After the error occurs, the server usually locks up and does not accept new
> connections. One server self-recovered after these errors after 30min
> outage, and started accepting new connections.
> Apparently I am not the ony one who has enountered this:
>
> http://stackoverflow.com/questions/12600137/twisted-internet-epollreactor-py
> -line-238-in-add
>
> Is there a patch available, or should I roll back to 10.0.0?
>
>
>
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>
Hi All
I remembered twisted started using python own select.epoll instead of
its own implementation after dropping support for python 2.5. Is it the
reason? A few days ago, there was a post asking a similar question.
Regards
gelin yan
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