[Django] #23110: TransactionManagementError when exception is thrown in django/contrib/sessions/backends/cached_db.py
Django
django/contrib/sessions/backends/cached_db.py
-------------------------------------+--------------------
Reporter: karthikr | Owner: nobody
Type: Bug | Status: new
Component: Core (Cache system) | Version: 1.6
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+--------------------
I was in the process of upgrading from django 1.5.1 to 1.6.5, and found
this wierd issue. When I try to access any block of code which accesses
the request.user object, the transaction.commit() fails because of the
session. (Session matching query does not exist)
{{{
Environment:
Request Method: GET
Request URL: http://dev.wnyc.net:9876/in_iframe/accounts/login/
Django Version: 1.6.5
Python Version: 2.7.3
Traceback:
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/core/handlers/base.py" in get_response
137. response = response.render()
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/template/response.py" in render
105. self.content = self.rendered_content
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/template/response.py" in rendered_content
82. content = template.render(context)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/transaction.py" in inner
371. return func(*args, **kwargs)
File "/home/kravindra/workspace/puppysite/puppy/settings/monkeypatch.py"
in render
67. return
self.template_obj.render_unicode(**context_to_dict(context))
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/mako/template.py" in render_unicode
198. as_unicode=True)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/mako/runtime.py" in _render
403. _render_context(template, callable_, context, *args,
**_kwargs_for_callable(callable_, data))
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/mako/runtime.py" in _render_context
434. _exec_template(inherit, lclcontext, args=args,
kwargs=kwargs)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/mako/runtime.py" in _exec_template
457. callable_(context, *args, **kwargs)
File "/tmp/kravindra/makopuppy/puppysite/base/really_stripped.html.py" in
render_body
88. __M_writer(unicode(self.body()))
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/mako/runtime.py" in <lambda>
278. return lambda *args, **kwargs:callable_(self.context,
*args, **kwargs)
File "/tmp/kravindra/makopuppy/puppysite/registration/login.html.py" in
render_body
72. runtime._include_file(context,
u'/registration/socialregistration.html', _template_uri)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/mako/runtime.py" in _include_file
341. callable_(ctx, **_kwargs_for_include(callable_, context._orig,
**kwargs))
File
"/tmp/kravindra/makopuppy/puppysite/registration/socialregistration.html.py"
in render_body
66. __M_writer(unicode(django_template_tag(request,
template_tag_function, template_path)))
File "/home/kravindra/workspace/puppysite/puppy/util/templateutils.py" in
django_template_tag
30. tag_context =
Context(dict_=template_tag_function(context_getting_context))
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/socialregistration/templatetags/facebook_tags.py" in
facebook_button
15. logged_in = context['request'].user.is_authenticated()
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/utils/functional.py" in inner
213. self._setup()
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/utils/functional.py" in _setup
298. self._wrapped = self._setupfunc()
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/auth/middleware.py" in <lambda>
18. request.user = SimpleLazyObject(lambda: get_user(request))
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/auth/middleware.py" in get_user
10. request._cached_user = auth.get_user(request)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/auth/__init__.py" in get_user
140. user_id = request.session[SESSION_KEY]
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/sessions/backends/base.py" in __getitem__
47. return self._session[key]
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/sessions/backends/base.py" in _get_session
173. self._session_cache = self.load()
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/sessions/backends/cached_db.py" in load
52. self.create()
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/sessions/backends/db.py" in create
40. self.save(must_create=True)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/sessions/backends/cached_db.py" in save
62. super(SessionStore, self).save(must_create)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/contrib/sessions/backends/db.py" in save
63. obj.save(force_insert=must_create, using=using)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/models/base.py" in save
545. force_update=force_update,
update_fields=update_fields)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/models/base.py" in save_base
582. update_fields=update_fields,
raw=raw, using=using)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/dispatch/dispatcher.py" in send
185. response = receiver(signal=self, sender=sender,
**named)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/transaction.py" in inner
430. with self:
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/transaction.py" in __enter__
422. self.entering(self.using)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/transaction.py" in entering
483. enter_transaction_management(using=using)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/transaction.py" in enter_transaction_management
70. get_connection(using).enter_transaction_management(managed,
forced)
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/backends/__init__.py" in enter_transaction_management
287. self.validate_no_atomic_block()
File "/usr/local/virtualenvs/karthik-django165/local/lib/python2.7/site-
packages/django/db/backends/__init__.py" in validate_no_atomic_block
367. "This is forbidden when an 'atomic' block is
active.")
Exception Type: TransactionManagementError at /in_iframe/accounts/login/
Exception Value: This is forbidden when an 'atomic' block is active.
}}}
I am using cached_db as the session engine
{{{
SESSION_ENGINE = 'django.contrib.sessions.backends.cached_db'
}}}
Should I change this to
{{{
SESSION_ENGINE = 'django.contrib.sessions.backends.cache'
}}}
the outcome is the same.
Some more context:
Backend database - POSTGRES
Have included the middleware classes, etc as recommended in the django 1.6
documentation.
Lets say I inject a dummy 'session', everything works fine.
Has anyone else seen this issue? I went through StackOverflow, and the
tickets in in code.djangoproject.com, and none of them seem to address
this specific issue.
--
Ticket URL: <https://code.djangoproject.com/ticket/23110>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
Django
django/contrib/sessions/backends/cached_db.py
Reporter: karthikr | Owner: nobody
Type: Bug | Status: new
Component: Core (Cache system) | Version: 1.6
Keywords: | Triage Stage:
Has patch: 0 | Unreviewed
Needs tests: 0 | Needs documentation: 0
Easy pickings: 0 | Patch needs improvement: 0
| UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by karthikr12):
* cc: karthikr12 (added)
* needs_better_patch: => 0
* needs_tests: => 0
* needs_docs: => 0
--
Ticket URL: <https://code.djangoproject.com/ticket/23110#comment:1>
Django
django/contrib/sessions/backends/cached_db.py
Reporter: karthikr | Owner: nobody
Type: Bug | Status: closed
Component: Core (Cache system) | Version: 1.6
Keywords: | Triage Stage:
Has patch: 0 | Unreviewed
Needs tests: 0 | Needs documentation: 0
Easy pickings: 0 | Patch needs improvement: 0
| UI/UX: 0
-------------------------------------+-------------------------------------
* status: new => closed
* resolution: => needsinfo
Comment:
We'd need a minimal project to reproduce the issue or a test for Django's
test suite in order to investigate, but I'd say it's more likely that this
is a bug somewhere in your own project and not in Django in which case
please see TicketClosingReasons/UseSupportChannels.
Please reopen if you can provide more details that suggests this is a bug
in Django itself. Thanks!
--
Ticket URL: <https://code.djangoproject.com/ticket/23110#comment:2>