#11906: QuerySet._fill_cache is not thread-safe
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Reporter: mrts | Owner: nobody
Status: new | Milestone:
Component: Database layer (models, ORM) | Version: SVN
Keywords: | Stage: Unreviewed
Has_patch: 0 |
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If several threads iterate over the same queryset, the following error
occurs:
{{{
File "/some/path/__init__.py", line 624, in prerender
for obj in objects: # <-- objects is a QuerySet
File "/some/path/python2.5/site-packages/django/db/models/query.py", line
106, in _result_iter
self._fill_cache()
File "/some/path/python2.5/site-packages/django/db/models/query.py", line
692, in _fill_cache
self._result_cache.append(self._iter.next())
ValueError: generator already executing
}}}
That happens as multiple threads concurrently both append to
`self._result_cahce` and consume `self._iter` (see
source:/django/trunk/django/db/models/query...@11584#l692).
--
Ticket URL: <http://code.djangoproject.com/ticket/11906>
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