Ticket #844 (defect)

I'm using CherryPy 3.1 with Apache 2.0.59, Python 2.5.2 and mod_python 3.3.1 on Mac OS 10.5.4, and I'm testing my installation with the code from the mod_python example.

This is my test code:

import cherrypy

class Root:
    @cherrypy.expose
    def index(self):
        return 'Hi there, Ho there, Hey there'

def setup_server():
    # Set up site-wide config. Do this first so that,
    # if something goes wrong, we get a log.
    cherrypy.config.update({'environment': 'production',
                            'log.screen': False,
                            'log.error_file': 'site.log',
                            'server.socket_host': '127.0.0.1',
                            'show_tracebacks': False})
    
    cherrypy.tree.mount(Root())
    cherrypy.engine.start()

I modified the code according to details in UpgradeTo31.

Here is my Apache configuration in httpd.conf:

<Location "/myapp">
  PythonPath "sys.path+['/Users/tim/Desktop']"
  SetHandler python-program
  PythonHandler cherrypy._cpmodpy::handler
  PythonOption cherrypy.setup myapp::setup_server
  PythonDebug On
</Location>

(My test code is at /Users/tim/Desktop/myapp.py)

When I first load the application in my browser (via http://localhost:8888/myapp), CherryPy behaves as expected. But if I wait several seconds before reloading the app, mod_python prints "Unrecoverable error in the server.", and I get this message in my error log:

[25/Jul/2008:15:06:04] ENGINE Bus STARTING
[25/Jul/2008:15:06:04] ENGINE Started monitor thread '_TimeoutMonitor'.
[25/Jul/2008:15:06:09] ENGINE Error in 'start' listener <bound method Server.start of <cherrypy._cpserver.Server object at 0x438f470>>
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/wspbus.py", line 147, in publish
    output.append(listener(*args, **kwargs))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/_cpserver.py", line 89, in start
    ServerAdapter.start(self)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/servers.py", line 53, in start
    wait_for_free_port(*self.bind_addr)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/servers.py", line 209, in wait_for_free_port
    raise IOError("Port %r not free on %r" % (port, host))
IOError: Port 8080 not free on '127.0.0.1'

[25/Jul/2008:15:06:09] ENGINE Shutting down due to error in start listener:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/wspbus.py", line 180, in start
    self.publish('start')
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/wspbus.py", line 147, in publish
    output.append(listener(*args, **kwargs))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/_cpserver.py", line 89, in start
    ServerAdapter.start(self)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/servers.py", line 53, in start
    wait_for_free_port(*self.bind_addr)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/servers.py", line 209, in wait_for_free_port
    raise IOError("Port %r not free on %r" % (port, host))
IOError: Port 8080 not free on '127.0.0.1'

[25/Jul/2008:15:06:09] ENGINE Bus STOPPING
[25/Jul/2008:15:06:09] ENGINE HTTP Server cherrypy._cpwsgi_server.CPWSGIServer(('127.0.0.1', 8080)) already shut down
[25/Jul/2008:15:06:09] ENGINE Stopped thread '_TimeoutMonitor'.
[25/Jul/2008:15:06:09] ENGINE Bus STOPPED
[25/Jul/2008:15:06:09] ENGINE Bus EXITING
[25/Jul/2008:15:06:09] ENGINE Bus EXITED
[25/Jul/2008:15:06:09] MOD_PYTHON Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/_cpmodpy.py", line 139, in handler
    setup(req)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/_cpmodpy.py", line 84, in setup
    func()
  File "/Users/tim/Desktop/myapp.py", line 20, in setup_server
    cherrypy.engine.start()
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/wspbus.py", line 180, in start
    self.publish('start')
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/wspbus.py", line 147, in publish
    output.append(listener(*args, **kwargs))
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/_cpserver.py", line 89, in start
    ServerAdapter.start(self)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/servers.py", line 53, in start
    wait_for_free_port(*self.bind_addr)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/CherryPy-3.1.0-py2.5.egg/cherrypy/process/servers.py", line 209, in wait_for_free_port
    raise IOError("Port %r not free on %r" % (port, host))
IOError: Port 8080 not free on '127.0.0.1'

This problem does not seem to occur in CherryPy 3.0.2.

I appreciate your assistance,

Tim E.