>From the frontend I trigger via AJAX a view that again starts a thread
that does some import work, that might take quite a while. This
enables the user to keep going and have the import run without
interrupting him/her. Every once in a while an asynch call checks on
the state of the import.
And here lies the problem: while the thread is running and busy like a
bee adding data in the DB the asynch call to check on the state also
tries to run a query and that causes the following exception:
Traceback (most recent call last):
File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/threading.py",
line 442, in __bootstrap
self.run()
File "/Users/cain/programming/pms/trunk/pm/../pm/core/views/pic.py",
line 204, in run
self._save(kwargs, sizes, thumbnail_url)
File "/Users/cain/programming/pms/trunk/pm/../pm/core/views/pic.py",
line 211, in _save
picimport.save()
File "/Users/cain/programming/django/trunk/django/db/models/base.py",
line 184, in save
db_values + [pk_val])
File "/Users/cain/programming/django/trunk/django/db/backends/util.py",
line 12, in execute
return self.cursor.execute(sql, params)
File "/Users/cain/programming/django/trunk/django/db/backends/mysql/base.py",
line 42, in execute
return self.cursor.execute(sql, params)
File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/MySQLdb/cursors.py",
line 137, in execute
self.errorhandler(self, exc, value)
File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/MySQLdb/connections.py",
line 33, in defaulterrorhandler
raise errorclass, errorvalue
ReferenceError: weakly-referenced object no longer exists
I had found the ticket http://code.djangoproject.com/ticket/1442 which
looks like it did solve my problem. So where does my problem come
from?
Is the problem caused by using multiple cursors (as I would guess from
the traceback)? Any ideas?
Thanks in advance
--
cu
Wolfram
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