Problems with ImportError: cannot import name interfaces on Ubuntu 10.04 apache WSGI deployment

[Shane]

Hello,

I am testing the deployment of an application under:

Ubuntu: 10.04
TG2.2.0
Apache/2.2.14 (Ubuntu) mod_wsgi/2.8

Intermittently (say every 48 hours of so), the app crashes with the
following:

[Sun Dec 09 14:37:49 2012] [error] mod_wsgi (pid=23383): Target WSGI script
'/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi' cannot be
loaded as Python module.
[Sun Dec 09 14:37:49 2012] [error] mod_wsgi (pid=23383): Exception occurred
processing WSGI script
'/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi'.
[Sun Dec 09 14:37:49 2012] [error] Traceback (most recent call last):
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi", line 49, in
<module>
[Sun Dec 09 14:37:49 2012] [error] application =
loadapp('config:/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/alpha-production.ini')
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 247, in loadapp
[Sun Dec 09 14:37:49 2012] [error] return loadobj(APP, uri, name=name, **kw)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 271, in loadobj
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 296, in loadcontext
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 320, in _loadconfig
[Sun Dec 09 14:37:49 2012] [error] return loader.get_context(object_type,
name, global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 454, in get_context
[Sun Dec 09 14:37:49 2012] [error] section)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 476, in _context_from_use
[Sun Dec 09 14:37:49 2012] [error] object_type, name=use,
global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 406, in get_context
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 296, in loadcontext
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 328, in _loadegg
[Sun Dec 09 14:37:49 2012] [error] return loader.get_context(object_type,
name, global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 620, in get_context
[Sun Dec 09 14:37:49 2012] [error] object_type, name=name)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 646, in find_egg_entry_point
[Sun Dec 09 14:37:49 2012] [error] possible.append((entry.load(), protocol,
entry.name))
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/BASELINE2.7/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py",
line 1954, in load
[Sun Dec 09 14:37:49 2012] [error] entry = __import__(self.module_name,
globals(),globals(), ['__name__'])
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/MyAPP/config/middleware.py",
line 4, in <module>
[Sun Dec 09 14:37:49 2012] [error] from MyAPP.config.app_cfg import
base_config
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/MyAPP/config/app_cfg.py", line
19, in <module>
[Sun Dec 09 14:37:49 2012] [error] from MyAPP import model
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/MyAPP/model/__init__.py", line
4, in <module>
[Sun Dec 09 14:37:49 2012] [error] from zope.sqlalchemy import
ZopeTransactionExtension
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/zope.sqlalchemy-0.7.1-py2.7.egg/zope/sqlalchemy/__init__.py",
line 17, in <module>
[Sun Dec 09 14:37:49 2012] [error] from zope.sqlalchemy.datamanager import
ZopeTransactionExtension, mark_changed
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/zope.sqlalchemy-0.7.1-py2.7.egg/zope/sqlalchemy/datamanager.py",
line 15, in <module>
[Sun Dec 09 14:37:49 2012] [error] import transaction as zope_transaction
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/transaction-1.3.0-py2.7.egg/transaction/__init__.py",
line 19, in <module>
[Sun Dec 09 14:37:49 2012] [error] from transaction._transaction import
Transaction
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/transaction-1.3.0-py2.7.egg/transaction/_transaction.py",
line 115, in <module>
[Sun Dec 09 14:37:49 2012] [error] from transaction import interfaces
[Sun Dec 09 14:37:49 2012] [error] ImportError: cannot import name
interfaces

The problem seems similar to that in
http://osdir.com/ml/turbogears/2011-03/msg00052.html, but I did install the
VE with --no-site-packages and within my environment, I can run python -c
'from transaction import interfaces' w/o an error. It does not seem to be
a problem with a missing package. transaction-1.3.0 seems to be the
current requirement (I easy_installed it just to be sure and that was the
version present). I ad the same problem with the same app with TG2.0
deployment and was hoping the upgrade to TG2.2 would fix it, but so far no
luck.

I have a cron job that restarts apache every night and that seems to work
OK, but looking for the cause of the problem.

Any ideas?

Thanks,

Shane

[Michael Pedersen]

I was going to suggest upgrading to mod_wsgi 3.4, but I've just checked: We
only ship transaction 1.1.1 by default still. See
http://www.turbogears.org/2.2/downloads/2.2.0/index/transaction/index.html

It's been a few months since I've cut a new release, but I seem to recall
going to higher versions of transactions as presenting problems. I'd
suggest downgrading to transactions 1.1.1 (from your VE, "easy_install
transactions==1.1.1"), and use that version. I'd expect that to fix it
pretty quickly.

Post by Shane
Hello,
Ubuntu: 10.04
TG2.2.0
Apache/2.2.14 (Ubuntu) mod_wsgi/2.8
Intermittently (say every 48 hours of so), the app crashes with the
[Sun Dec 09 14:37:49 2012] [error] mod_wsgi (pid=23383): Target WSGI
script '/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi'
cannot be loaded as Python module.
[Sun Dec 09 14:37:49 2012] [error] mod_wsgi (pid=23383): Exception
occurred processing WSGI script
'/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi'.
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi", line 49, in
<module>
[Sun Dec 09 14:37:49 2012] [error] application =
loadapp('config:/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/alpha-production.ini')
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 247, in loadapp
[Sun Dec 09 14:37:49 2012] [error] return loadobj(APP, uri, name=name, **kw)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 271, in loadobj
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 296, in loadcontext
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 320, in _loadconfig
[Sun Dec 09 14:37:49 2012] [error] return loader.get_context(object_type,
name, global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 454, in get_context
[Sun Dec 09 14:37:49 2012] [error] section)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 476, in _context_from_use
[Sun Dec 09 14:37:49 2012] [error] object_type, name=use,
global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 406, in get_context
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 296, in loadcontext
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 328, in _loadegg
[Sun Dec 09 14:37:49 2012] [error] return loader.get_context(object_type,
name, global_conf)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 620, in get_context
[Sun Dec 09 14:37:49 2012] [error] object_type, name=name)
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py",
line 646, in find_egg_entry_point
[Sun Dec 09 14:37:49 2012] [error] possible.append((entry.load(),
protocol, entry.name))
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/BASELINE2.7/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py",
line 1954, in load
[Sun Dec 09 14:37:49 2012] [error] entry = __import__(self.module_name,
globals(),globals(), ['__name__'])
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/MyAPP/config/middleware.py",
line 4, in <module>
[Sun Dec 09 14:37:49 2012] [error] from MyAPP.config.app_cfg import
base_config
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/MyAPP/config/app_cfg.py", line
19, in <module>
[Sun Dec 09 14:37:49 2012] [error] from MyAPP import model
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/MyAPP/model/__init__.py", line
4, in <module>
[Sun Dec 09 14:37:49 2012] [error] from zope.sqlalchemy import
ZopeTransactionExtension
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/zope.sqlalchemy-0.7.1-py2.7.egg/zope/sqlalchemy/__init__.py",
line 17, in <module>
[Sun Dec 09 14:37:49 2012] [error] from zope.sqlalchemy.datamanager import
ZopeTransactionExtension, mark_changed
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/zope.sqlalchemy-0.7.1-py2.7.egg/zope/sqlalchemy/datamanager.py",
line 15, in <module>
[Sun Dec 09 14:37:49 2012] [error] import transaction as zope_transaction
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/transaction-1.3.0-py2.7.egg/transaction/__init__.py",
line 19, in <module>
[Sun Dec 09 14:37:49 2012] [error] from transaction._transaction import
Transaction
[Sun Dec 09 14:37:49 2012] [error] File
"/usr/local/pythonenv/TG2.2ENV/lib/python2.7/site-packages/transaction-1.3.0-py2.7.egg/transaction/_transaction.py",
line 115, in <module>
[Sun Dec 09 14:37:49 2012] [error] from transaction import interfaces
[Sun Dec 09 14:37:49 2012] [error] ImportError: cannot import name
interfaces
The problem seems similar to that in
http://osdir.com/ml/turbogears/2011-03/msg00052.html, but I did install
the VE with --no-site-packages and within my environment, I can run python
-c 'from transaction import interfaces' w/o an error. It does not seem to
be a problem with a missing package. transaction-1.3.0 seems to be the
current requirement (I easy_installed it just to be sure and that was the
version present). I ad the same problem with the same app with TG2.0
deployment and was hoping the upgrade to TG2.2 would fix it, but so far no
luck.
I have a cron job that restarts apache every night and that seems to work
OK, but looking for the cause of the problem.
Any ideas?
Thanks,
Shane
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Michael J. Pedersen
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[Shane]

Stuart,

I have a similar problem. Can you tell me if you ever found a fix?

- Shane

Listen 8080
/etc/apache2/sites-enabled/MCPCS file
NameVirtualHost 10.81.27.21:8080
<VirtualHost 10.81.27.21:8080>
ServerName vmusjzdev2.co.marshall.ia.us
DocumentRoot /var/www/MCPCS
# WSGIProcessGroup MCPCS
# WSGIDaemonProcess MCPCS
python-path=/opt/TG23MCPCS-env/lib/python2.7/site-packages
WSGIProcessGroup %{GLOBAL}
WSGIScriptAlias / /opt/MCPCS/apache/MCPCS.wsgi
WSGIPassAuthorization On
Alias /images /opt/MCPCS/mcispis/public/images
Alias /css /opt/MCPCS/mcispis/public/css
Alias /javascript /opt/MCPCS/mcispis/public/javascript
Alias /media /opt/MCPCS/mcispis/public/media
<Directory /opt/MCPCS/apache>
Order deny,allow
Allow from all
</Directory>
ErrorLog /var/log/apache2/MCPCS/error.log
LogLevel warn
CustomLog /var/log/apache2/MCPCS/access.log combined
</VirtualHost>
Stuart Zurcher
1134 Spencer St.
Grinnell, IA 50112
Cell: 641-521-5133

I've been fighting this same issue for about a month with it happening
intermittently...once or twice a week or every other week.
I changed to transactions-1.1.1.
Still get the interfaces import error. When it restarts, it has
RuntimeError: class.__dict__ not accessible in restricted mode
Based on recommendation from http://stackoverflow.com/
questions/10557930/mod-wsgi-error-class-dict-not-
accessible-in-restricted-mode, I added the following to
/etc/apache2/sites-enabled/
WSGIProcessGroup %{GLOBAL}
Any one else had this problem and soved it?

We only ship transaction 1.1.1 by default still. See
http://www.turbogears.org/2.2/downloads/2.2.0/index/
transaction/index.html
It's been a few months since I've cut a new release, but I seem to
recall going to higher versions of transactions as presenting problems. I'd
suggest downgrading to transactions 1.1.1 (from your VE, "easy_install
transactions==1.1.1"), and use that version. I'd expect that to fix it
pretty quickly.

Post by Shane
Hello,
Ubuntu: 10.04
TG2.2.0
Apache/2.2.14 (Ubuntu) mod_wsgi/2.8
Intermittently (say every 48 hours of so), the app crashes with the
[Sun Dec 09 14:37:49 2012] [error] mod_wsgi (pid=23383): Target WSGI
script '/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi'
cannot be loaded as Python module.
[Sun Dec 09 14:37:49 2012] [error] mod_wsgi (pid=23383): Exception
occurred processing WSGI script '/usr/local/pythonenv/TG2.
2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi'.
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/MyAPP-R2.2.1/apache/MyAPP.wsgi", line 49, in <module>
[Sun Dec 09 14:37:49 2012] [error] application =
loadapp('config:/usr/local/pythonenv/TG2.2ENV/MyAPP-R2.2.
1/alpha-production.ini')
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 247, in loadapp
[Sun Dec 09 14:37:49 2012] [error] return loadobj(APP, uri, name=name, **kw)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 271, in loadobj
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 296, in loadcontext
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 320, in _loadconfig
[Sun Dec 09 14:37:49 2012] [error] return loader.get_context(object_type,
name, global_conf)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 454, in get_context
[Sun Dec 09 14:37:49 2012] [error] section)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 476, in _context_from_use
[Sun Dec 09 14:37:49 2012] [error] object_type, name=use,
global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 406, in get_context
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 296, in loadcontext
[Sun Dec 09 14:37:49 2012] [error] global_conf=global_conf)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 328, in _loadegg
[Sun Dec 09 14:37:49 2012] [error] return loader.get_context(object_type,
name, global_conf)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 620, in get_context
[Sun Dec 09 14:37:49 2012] [error] object_type, name=name)
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/PasteDeploy-1.5.0-
py2.7.egg/paste/deploy/loadwsgi.py", line 646, in find_egg_entry_point
[Sun Dec 09 14:37:49 2012] [error] possible.append((entry.load(),
protocol, entry.name))
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/
BASELINE2.7/lib/python2.7/site-packages/setuptools-0.
6c11-py2.7.egg/pkg_resources.py", line 1954, in load
[Sun Dec 09 14:37:49 2012] [error] entry = __import__(self.module_name,
globals(),globals(), ['__name__'])
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/MyAPP-R2.2.1/MyAPP/config/middleware.py", line 4, in <module>
[Sun Dec 09 14:37:49 2012] [error] from MyAPP.config.app_cfg import
base_config
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/MyAPP-R2.2.1/MyAPP/config/app_cfg.py", line 19, in <module>
[Sun Dec 09 14:37:49 2012] [error] from MyAPP import model
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/MyAPP-R2.2.1/MyAPP/model/__init__.py", line 4, in <module>
[Sun Dec 09 14:37:49 2012] [error] from zope.sqlalchemy import
ZopeTransactionExtension
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/zope.sqlalchemy-0.7.
1-py2.7.egg/zope/sqlalchemy/__init__.py", line 17, in <module>
[Sun Dec 09 14:37:49 2012] [error] from zope.sqlalchemy.datamanager
import ZopeTransactionExtension, mark_changed
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/zope.sqlalchemy-0.7.
1-py2.7.egg/zope/sqlalchemy/datamanager.py", line 15, in <module>
[Sun Dec 09 14:37:49 2012] [error] import transaction as
zope_transaction
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/transaction-1.3.0-
py2.7.egg/transaction/__init__.py", line 19, in <module>
[Sun Dec 09 14:37:49 2012] [error] from transaction._transaction import
Transaction
[Sun Dec 09 14:37:49 2012] [error] File "/usr/local/pythonenv/TG2.
2ENV/lib/python2.7/site-packages/transaction-1.3.0-
py2.7.egg/transaction/_transaction.py", line 115, in <module>
[Sun Dec 09 14:37:49 2012] [error] from transaction import interfaces
[Sun Dec 09 14:37:49 2012] [error] ImportError: cannot import name
interfaces
The problem seems similar to that in http://osdir.com/ml/
turbogears/2011-03/msg00052.html, but I did install the VE with
--no-site-packages and within my environment, I can run python -c 'from
transaction import interfaces' w/o an error. It does not seem to be a
problem with a missing package. transaction-1.3.0 seems to be the current
requirement (I easy_installed it just to be sure and that was the version
present). I ad the same problem with the same app with TG2.0 deployment
and was hoping the upgrade to TG2.2 would fix it, but so far no luck.
I have a cron job that restarts apache every night and that seems to
work OK, but looking for the cause of the problem.
Any ideas?
Thanks,
Shane
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[Stuart Zurcher]

@shane
I did, but no longer have access to the project. Sorry.

I think it had to do with how the dependencies were put in the project.