CherryPy 无法绑定到端口

Question

感谢大家的专业知识。我们正在使用 Cherrypy 运行一个 python 服务器来公开/处理我们的 API。在将 Ubuntu 10.10 升级到 11.04（带有固有的 python 更新）之前，它可以正常运行，但不幸的是，从那时起 CherryPy 并没有绑定到端口 80（使用代理端口 9998）。错误转储如下：

2015-03-24 23:21:16,610 cherrypy.error - INFO - [24/Mar/2015:23:21:16] ENGINE PID 17194 written to '/var/tmp/MYSERVERNAME.pid'.
2015-03-24 23:21:16,611 cherrypy.error - INFO - [24/Mar/2015:23:21:16] ENGINE Started monitor thread '_TimeoutMonitor'.
2015-03-24 23:21:16,611 cherrypy.error - INFO - [24/Mar/2015:23:21:16] ENGINE Started monitor thread 'Autoreloader'.
2015-03-24 23:21:21,771 cherrypy.error - ERROR - [24/Mar/2015:23:21:21] ENGINE Error in 'start' listener <bound method Server.start of <cherrypy._cpserver.Server object at 0x12ffa90>>
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/cherrypy/process/wspbus.py", line 147, in publish
    output.append(listener(*args, **kwargs))
  File "/usr/lib/pymodules/python2.7/cherrypy/_cpserver.py", line 90, in start
    ServerAdapter.start(self)
  File "/usr/lib/pymodules/python2.7/cherrypy/process/servers.py", line 60, in start
    self.wait()
  File "/usr/lib/pymodules/python2.7/cherrypy/process/servers.py", line 101, in wait
    wait_for_occupied_port(host, port)
  File "/usr/lib/pymodules/python2.7/cherrypy/process/servers.py", line 266, in wait_for_occupied_port
    raise IOError("Port %r not bound on %r" % (port, host))
IOError: Port 9998 not bound on '127.0.0.1'

运行 netstat 看看是什么占用了端口显示：

alpha$ sudo netstat -pnl | grep 8080
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      17194/python

如您所见，PID 为 17194 的 python 服务器启动，启动cherrypy（失败）。我不确定什么与这里的内容发生冲突。正如您可能会说的，我不是服务员，但这并不能阻止我乱搞乱搞！任何人都知道为什么 CherryPy 可能没有绑定？

Answer 1

我卸载了 CherryPy 并将 CherryPy 重新安装到最新（3.2），问题自行解决了。