python - Tornado 中断的系统调用

Question

我时常遇到这个错误，但不确定如何调试。

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

有谁知道这意味着什么/什么时候发生？

我正在使用 python 2.7 和 tornado 3.2.1

更新:这段代码在ioloop.py

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

Answer 1

看来你应该升级你的 Tornado 版本；此错误(从 poll 返回的 EINTR)似乎是 fixed in the latest versions .