id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
32036	stack overflow on admin save	Riccardo Magliocchetti	nobody	"Found this splat on gunicorn logs, this happen sometimes on model deletion from admin:

{{{
Fatal Python error: Cannot recover from stack overflow.

Current thread 0x00007f79b9a46740 (most recent call first):
  File ""/usr/lib/python3.6/asyncio/events.py"", line 691 in get_event_loop
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/asgiref/sync.py"", line 334 in get_current_task
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/asgiref/local.py"", line 54 in _get_context_id
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/asgiref/local.py"", line 83 in _get_storage
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/asgiref/local.py"", line 100 in __getattr__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/utils.py"", line 201 in __getitem__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/sql/query.py"", line 1181 in build_lookup
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/sql/query.py"", line 1315 in build_filter
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/sql/query.py"", line 1385 in _add_q
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/sql/query.py"", line 1377 in _add_q
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/sql/query.py"", line 1354 in add_q
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 923 in _filter_or_exclude
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 904 in filter
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 404 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py"", line 153 in get_object
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py"", line 186 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 151 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related.py"", line 655 in get_instance_value_for_fields
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related.py"", line 635 in get_local_related_value
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py"", line 174 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 151 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 152 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related.py"", line 655 in get_instance_value_for_fields
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related.py"", line 635 in get_local_related_value
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py"", line 174 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 151 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 152 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related.py"", line 655 in get_instance_value_for_fields
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related.py"", line 635 in get_local_related_value
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py"", line 174 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 151 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 152 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related.py"", line 655 in get_instance_value_for_fields
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related.py"", line 635 in get_local_related_value
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py"", line 174 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 151 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  File ""/home/deploy/foo.bar.net/project/subscriber/models.py"", line 152 in __init__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 512 in from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 75 in __iter__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 1261 in _fetch_all
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 258 in __len__
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query.py"", line 411 in get
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/base.py"", line 627 in refresh_from_db
  File ""/home/deploy/foo.bar.net/lib/python3.6/site-packages/django/db/models/query_utils.py"", line 139 in __get__
  ...
}}}

Our code is the following:

{{{
class Model(models.Model):
    subscription = models.ForeignKey(Config, on_delete=models.SET_NULL, null=True, blank=True)

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # line 151 is the following
        self._prev_subscription_id = self.subscription and self.subscription.subscription_id or None
        self._prev_table_id = self.table_id
}}}

This is Python 3.6.9 and Django 3.0.9 with asgiref 3.2.7. I can upgrade asgiref to 3.2.10, I haven't seen anything related on django 3.1 release notes."	Bug	closed	Uncategorized	3.0	Normal	invalid	threading	Riccardo Magliocchetti	Unreviewed	0	0	0	0	0	0