Question

我发现当我用sudo启动CherryPy服务器时，然后按Ctrl-C尝试终止它，它有时会（〜1/3的时间）挂起。我可以使用CherryPy hello world重现这个：

import cherrypy
class HelloWorld(object):
    def index(self):
        return "Hello World!"
    index.exposed = True

cherrypy.quickstart(HelloWorld())

我看到的输出是：

$ sudo python hello.py 
[23/Nov/2012:21:23:03] ENGINE Listening for SIGHUP.
[23/Nov/2012:21:23:03] ENGINE Listening for SIGTERM.
[23/Nov/2012:21:23:03] ENGINE Listening for SIGUSR1.
[23/Nov/2012:21:23:03] ENGINE Bus STARTING
CherryPy Checker:
The Application mounted at '' has an empty config.

[23/Nov/2012:21:23:03] ENGINE Started monitor thread 'Autoreloader'.
[23/Nov/2012:21:23:03] ENGINE Started monitor thread '_TimeoutMonitor'.
[23/Nov/2012:21:23:04] ENGINE Serving on 127.0.0.1:8080
[23/Nov/2012:21:23:04] ENGINE Bus STARTED
^CTraceback (most recent call last):
  File "hello.py", line 7, in <module>
    cherrypy.quickstart(HelloWorld())
  File "/usr/local/lib/python2.7/site-packages/CherryPy-3.2.2-py2.7.egg/cherrypy/__init__.py", line 161, in quickstart
    engine.block()
  File "/usr/local/lib/python2.7/site-packages/CherryPy-3.2.2-py2.7.egg/cherrypy/process/wspbus.py", line 303, in block
    except (KeyboardInterrupt, IOError):
KeyboardInterrupt
<No subsequent command prompt>

这对我来说是一个问题因为我想在端口80上运行我的服务器，并且我在其他线程中有一些应该正确清理的东西。我想这主要是调试的麻烦，但我很好奇。

Answer 1

我用CherryPy解决了这个问题。事实证明问题是我正在使用的sudo版本（1.7.4）：

https://bitbucket.org/cherrypy/cherrypy/issue/1186/sometimes-hangs-when-running-with-sudo-and

我重新测试了最新的（1.8.6p3）并且不再有这个问题了。感谢Chris Beelby！

为什么在使用Ctrl-C终止时，运行带有sudo的CherryPy有时会挂起？

1 个答案: