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Liam Hoekenga
liamr at umich.edu
Wed Aug 29 10:28:36 EDT 2007
I'm a sysadmin who's part of a group that provides campus-wide web hosting
at our university. We're working with a faculty member who would like us
to host an application he wrote in his departmental web environment and
we're having issues. Of course the application "just works" on his
departmental machine, but when we try it on our box, the most current
error we're getting is...
ImportError: reload(): module _mp_a52d922604fbb12687f4374d3c536a1b
not in sys.modules
Their departmental server is using Apache 2.0.52, Python 2.3.4 and
mod_python 3.1.3.
We're using Apache 2.2.3, Python 2.5, and mod_python 3.3.1.
I'm not a python programmer and this is my first forray in to mod_python.
It kind of looks like from the rest of the debugging output that
_mp_a52d922604fbb12687f4374d3c536a1b is the name of a "file" that
mod_python has already processed an inserted into a cache.. and that
perhaps that cache isn't in the python path? I don't know. Kinda
grasping at straws here.
Here's our current mod_python configuration for the directory in question..
Alias /pharmacy/ /home/pharmacy/Private/html/
<IfModule mod_python.c>
<Directory /home/pharmacy/Private/html/>
AddHandler mod_python .py
AllowOverride AuthConfig FileInfo Indexes Limit
PythonAutoReload On
PythonHandler /home/pharmacy/Private/html/python-program.py
PythonDebug On
</Directory>
</IfModule>
If it does look like problems due to differences between the environments
in which the application was developed and the where we're trying to
deploy it, I'd be very appreciative for hints at what needs to be changed
to make it work. I'm very open to suggestions.
What follows are the excerpts from the apache error logs, and the output
we see when we access the page with PythonDebug enabled.
Liam
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Here's the appropriate output from the apache error log...
[Wed Aug 29 10:08:41 2007] [notice] mod_python (pid=6977, interpreter='example.umich.edu'): Importing module '/home/pharmacy/Private/html/python-program.py'
[Wed Aug 29 10:08:41 2007] [notice] mod_python (pid=6977, interpreter='example.umich.edu'): Importing module '/home/pharmacy/Private/html/tutor.py'
[Wed Aug 29 10:08:41 2007] [notice] mod_python (pid=6977, interpreter='example.umich.edu'): Importing module '/home/pharmacy/Private/html/lesson.py'
[Wed Aug 29 10:08:41 2007] [notice] mod_python (pid=6977, interpreter='example.umich.edu'): Importing module '/home/pharmacy/Private/html/tex.py'
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] mod_python (pid=6977, interpreter='example.umich.edu', phase='PythonHandler', handler='/home/pharmacy/Private/html/python-program.py'): Application error, referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] ServerName: 'example.umich.edu', referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] DocumentRoot: '/usr/share/apache2/htdocs/default/', referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] URI: '/pharmacy/python-program.py', referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] Location: None, referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] Directory: '/home/pharmacy/Private/html/', referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] Filename: '/home/pharmacy/Private/html/python-program.py', referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] PathInfo: '', referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] Traceback (most recent call last):, referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1537, in HandlerDispatch\n default=default_handler, arg=req, silent=hlist.silent), referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1229, in _process_target\n result = _execute_target(config, req, object, arg), referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1128, in _execute_target\n result = object(arg), referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] File "/home/pharmacy/Private/html/python-program.py", line 224, in handler\n s = coord.initHistory(session, formd), referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] File "/home/pharmacy/Private/html/python-program.py", line 132, in initHistory\n reload(tutor)\t# Force the current version of tutor module to be used., referer: https://example.umich.edu/pharmacy/python-program.py
[Wed Aug 29 10:08:45 2007] [error] [client xxx.xxx.xxx.xxx] ImportError: reload(): module _mp_a52d922604fbb12687f4374d3c536a1b not in sys.modules, referer: https://example.umich.edu/pharmacy/python-program.py
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Here's what we get when we access the page with PythonDebug turned on...
...continuing old session
...POST reading: uniqname=bjensen&lessonchoice=Minimal&startup=Start
...cwd='/'
...ls=['lost+found', 'var', '.bash_history', '.authorize', 'afs', 'bin', 'boot', 'dev',
'etc', 'home', 'lib', 'mnt', 'proc', 'root', 'sys', 'sbin', 'ticket', 'tmp', 'usr',
'opt', 'man']
MOD_PYTHON ERROR
ProcessId: 22409
Interpreter: 'example.umich.edu'
ServerName: 'example.umich.edu'
DocumentRoot: '/usr/share/apache2/htdocs/default/'
URI: '/pharmacy/python-program.py'
Location: None
Directory: '/home/pharmacy/Private/html/'
Filename: '/home/pharmacy/Private/html/
crippen/python-program.py'
PathInfo: ''
Phase: 'PythonHandler'
Handler: '/home/pharmacy/Private/html/
crippen/python-program.py'
Traceback (most recent call last):
File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1537, in
HandlerDispatch
default=default_handler, arg=req, silent=hlist.silent)
File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1229, in
_process_target
result = _execute_target(config, req, object, arg)
File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1128, in
_execute_target
result = object(arg)
File "/home/pharmacy/Private/html python-program.py",
line 224, in handler
s = coord.initHistory(session, formd)
File "/home/pharmacy/Private/html python-program.py",
line 132, in initHistory
reload(tutor) # Force the current version of tutor module to be used.
ImportError: reload(): module _mp_a52d922604fbb12687f4374d3c536a1b not in sys.modules
MODULE CACHE DETAILS
Accessed: Tue Aug 28 17:47:07 2007
Generation: 4
_mp_036881b8bfdae0dbd53cd31522b8613c {
FileName: '/home/pharmacy/Private/html/ crippen/lesson.py'
Instance: 1
Generation: 1
Modified: Wed Mar 7 13:53:05 2007
Imported: Tue Aug 28 17:26:23 2007
}
_mp_6e0a86c977aa7b4821de3f2e456eeb4d {
FileName: '/home/pharmacy/Private/html/
crippen/python-program.py'
Instance: 1
Generation: 4
Modified: Tue Aug 28 17:26:02 2007
Imported: Tue Aug 28 17:26:23 2007
ModulePath: '/home/pharmacy/Private/html/'
Children: '/home/pharmacy/Private/html/ crippen/tutor.py'
}
_mp_251123f760a2485b75c77026f93acd83 {
FileName: '/home/pharmacy/Private/html/ crippen/tex.py'
Instance: 1
Generation: 2
Modified: Fri Mar 30 09:39:23 2007
Imported: Tue Aug 28 17:26:23 2007
}
_mp_a52d922604fbb12687f4374d3c536a1b {
FileName: '/home/pharmacy/Private/html/ crippen/tutor.py'
Instance: 1
Generation: 3
Modified: Tue Aug 21 15:16:35 2007
Imported: Tue Aug 28 17:26:23 2007
Children: '/home/pharmacy/Private/html/ crippen/lesson.py',
'/home/pharmacy/Private/html/ crippen/tex.py'
}
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