... twisted / internet / epollreactor.py ", line 238, in _add

In case of failure, after the server program starts for a while, there will be many errors (error), the server can only accept client connections, but does not accept data, and finally pauses the animation. The following error:

//report error:
//report error:
Unhandled Error
    Traceback (most recent call last):
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/python/log.py", line 69, in callWithContext
        return context.call({ILogContext: newCtx}, func, *args, **kw)
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/python/context.py", line 118, in callWithContext
        return self.currentContext().callWithContext(ctx, func, *args, **kw)
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/python/context.py", line 81, in callWithContext
        return func(*args,**kw)
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/internet/posixbase.py", line 614, in _doReadOrWrite
        why = selectable.doRead()
//        --- <exception caught here> ---
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/internet/tcp.py", line 1016, in doRead
        transport = self.transport(skt, protocol, addr, self, s, self.reactor)
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/internet/tcp.py", line 773, in __init__
        self.startReading()
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/internet/abstract.py", line 416, in startReading
        self.reactor.addReader(self)
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/internet/epollreactor.py", line 254, in addReader
        _epoll.EPOLLIN, _epoll.EPOLLOUT)
      File "/usr/lib64/python2.7/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-linux-x86_64.egg/twisted/internet/epollreactor.py", line 238, in _add
        self._poller.modify(fd, flags)
    exceptions.IOError: [Errno 2] No such file or directory