Python 龙卷风中断系统调用

我经常会遇到这个错误，不知道如何调试

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/tornado/ioloop.py", line 662, in start
    event_pairs = self._impl.poll(poll_timeout)
IOError: [Errno 4] Interrupted system call

有人知道这意味着什么吗

我正在使用python 2.7和tornado 3.2.1

更新：此代码位于ioloop.py中

---

看来你应该升级你的龙卷风版本；此错误（

poll

返回的

EINTR

）似乎是错误

try:
    event_pairs = self._impl.poll(poll_timeout)
except Exception as e:
    # Depending on python version and IOLoop implementation,
    # different exception types may be thrown and there are
    # two ways EINTR might be signaled:
    # * e.errno == errno.EINTR
    # * e.args is like (errno.EINTR, 'Interrupted system call')
    if (getattr(e, 'errno', None) == errno.EINTR or
          (isinstance(getattr(e, 'args', None), tuple) and
          len(e.args) == 2 and e.args[0] == errno.EINTR)):
        continue
    else:
        raise