Comment 1 for bug 610388

This appears to be coming from the django-openid code package and not any of our specific code.

On 07/27/2010 05:33 AM, Roman Yepishev wrote:
> Public bug reported:
>
> This bug report serves as a master bug report for the issues with
> logging in that were caused by TransactionRollbackError on the server-
> side.
>
> These errors are temporary, usually next attempt will succeed but this
> definitely needs to be looked into and find why the transaction took
> that long.
>
> Traceback is:
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/db/models/sql/query.py, line 1734, in execute_sql
> cursor.execute(sql, params)
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/db/models/sql/subqueries.py, line 34, in do_query
> self.execute_sql(None)
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/db/models/sql/subqueries.py, line 86, in delete_batch
> self.do_query(self.model._meta.db_table, where)
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/db/models/query.py, line 870, in delete_objects
> del_query.delete_batch(pk_list)
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/db/models/base.py, line 443, in delete
> delete_objects(seen_objs)
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/contrib/sessions/backends/db.py, line 71, in delete
> Session.objects.get(session_key=session_key).delete()
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/contrib/sessions/backends/base.py, line 250, in cycle_key
> self.delete(key)
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/contrib/auth/__init__.py, line 64, in login
> request.session.cycle_key()
> Module /usr/lib/python2.5/site-packages/django_openid_auth/views.py, line 209, in login_complete
> auth_login(request, user)
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/core/handlers/base.py, line 86, in get_response
> response = callback(request, *callback_args, **callback_kwargs)
> Module /srv/ubuntuone.com/production/ubunet-rev-2946/utilities/../lib/django/core/handlers/wsgi.py, line 239, in __call__
> response = self.get_response(request)
> Module /var/lib/python-support/python2.5/paste/translogger.py, line 67, in __call__
> return self.application(environ, replacement_start_response)
> TransactionRollbackError: ' could not serialise access due to concurrent update'
>
> ** Affects: ubuntuone-servers
> Importance: Medium
> Assignee: Ubuntu One web team (ubuntuone-web)
> Status: New
>
> ** Visibility changed to: Public
>