#17619: MemoryError when deleting objects with many generic relations
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Reporter: bjourne@… | Owner: nobody
Type: Bug | Status: new
Component: contrib.contenttypes | Version: 1.3
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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When I delete an object which has several generic relations pointing to
it, I get a memory error. It seems like there is some memory leak or
infinite recursion going on because the process just locks up for a few
seconds while the Python process grows to 3gb in size and then terminates
with the MemoryError.
I don't have an isolated test case for it, but the problem is easy for me
to reproduce and I can provide more details if requested. Here is the full
traceback:
{{{
In [9]: g = Game.objects.get(id = 34519)
In [10]: g.delete()
MemoryError Traceback (most recent call
last)
/app/tngfooty/<ipython console> in <module>()
/usr/local/lib/python2.7/dist-packages/django/db/models/base.pyc in
delete(self, using)
578
579 collector = Collector(using=using)
--> 580 collector.collect([self])
581 collector.delete()
582
/usr/local/lib/python2.7/dist-packages/django/db/models/deletion.pyc in
collect(self, objs, source, nullable, collect_related, source_attr,
reverse_dependency)
176 for relation in model._meta.many_to_many:
177 if not relation.rel.through:
--> 178 sub_objs =
relation.bulk_related_objects(new_objs, self.using)
179 self.collect(sub_objs,
180 source=model,
/usr/local/lib/python2.7/dist-
packages/django/contrib/contenttypes/generic.pyc in
bulk_related_objects(self, objs, using)
183
184 """
--> 185 return
self.rel.to._base_manager.db_manager(using).filter(**{
186 "%s__pk" % self.content_type_field_name:
187
ContentType.objects.db_manager(using).get_for_model(self.model).pk,
/usr/local/lib/python2.7/dist-packages/django/db/models/manager.pyc in
db_manager(self, using)
90
91 def db_manager(self, using):
---> 92 obj = copy.copy(self)
93 obj._db = using
94 return obj
/usr/lib/python2.7/copy.pyc in copy(x)
86 reductor = getattr(x, "__reduce_ex__", None)
87 if reductor:
---> 88 rv = reductor(2)
89 else:
90 reductor = getattr(x, "__reduce__", None)
/usr/local/lib/python2.7/dist-packages/django/db/models/query.pyc in
__getstate__(self)
60 """
61 # Force the cache to be fully populated.
---> 62 len(self)
63
64 obj_dict = self.__dict__.copy()
/usr/local/lib/python2.7/dist-packages/django/db/models/query.pyc in
__len__(self)
80 self._result_cache = list(self._iter)
81 else:
---> 82 self._result_cache = list(self.iterator())
83 elif self._iter:
84 self._result_cache.extend(self._iter)
/usr/local/lib/python2.7/dist-packages/django/db/models/query.pyc in
iterator(self)
284 else:
285 # Omit aggregates in object creation.
--> 286 obj = model(*row[index_start:aggregate_start])
287
288 # Store the source database of the object
/usr/local/lib/python2.7/dist-packages/django/db/models/base.pyc in
__init__(self, *args, **kwargs)
274
275 def __init__(self, *args, **kwargs):
--> 276 signals.pre_init.send(sender=self.__class__, args=args,
kwargs=kwargs)
277
278 # Set up the storage for instance state
/usr/local/lib/python2.7/dist-packages/django/dispatch/dispatcher.pyc in
send(self, sender, **named)
170
171 for receiver in self._live_receivers(_make_id(sender)):
--> 172 response = receiver(signal=self, sender=sender,
**named)
173 responses.append((receiver, response))
174 return responses
MemoryError:
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/17619>
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