Failure in exception handling in current_thread_executor.py _WorkItem.run()

I'm not sure of the exact role that asgiref plays in the Django stack, and specifically how that might vary between a "debug" setup where Django itself - IIUC - serves the incoming requests, versus a "deployment" setup where, in my case, Django is fronted by nginx and gunicorn/uvicorn, so please forgive any inaccuracies in the following description.

I have a Django view whose Jinja template ends up expanding a link to a static URL, like this:

     const html = `{{ static(some-directory) }}/a-subdirectory/foo.html`;

In my "debug" setup, this works as expected, but it seems in my "deployment" setup the static(some-directory) ends up throwing the following exception:

   ValueError("Missing staticfiles manifest entry for 'some-directory'")

That in itself might be a minor issue, but unfortunately, when that bubbles up to the exception handling starting at https://github.com/django/asgiref/blob/8cf847a27da34e7d4490b41b682f657b4f302eaa/asgiref/current_thread_executor.py#L42 we end up spinning on some Linux futex (according to strace) consuming 100% of the CPU until forcibly SIGKILLd. The stack at this point looks like this:

Traceback (most recent call last):,
  File "/home/ubuntu/venv/lib/python3.10/site-packages/asgiref/sync.py", line 534, in thread_handler,
    raise exc_info[1],
  File "/home/ubuntu/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 42, in inner,
    response = await get_response(request),
  File "/home/ubuntu/venv/lib/python3.10/site-packages/django/core/handlers/base.py", line 253, in _get_response_async,
    response = await wrapped_callback(,
  File "/home/ubuntu/venv/lib/python3.10/site-packages/asgiref/sync.py", line 479, in __call__,
    ret: _R = await loop.run_in_executor(,
  File "/home/ubuntu/venv/lib/python3.10/site-packages/asgiref/current_thread_executor.py", line 40, in run,
    result = self.fn(*self.args, **self.kwargs),
  File "/home/ubuntu/venv/lib/python3.10/site-packages/asgiref/sync.py", line 538, in thread_handler,
    return func(*args, **kwargs),
  File "/home/ubuntu/venv/lib/python3.10/site-packages/django/views/generic/base.py", line 104, in view,
    return self.dispatch(request, *args, **kwargs),
  File "... our code ...", line 255, in dispatch,
    raise RuntimeError("about to return: generic_views.py[255]"),
RuntimeError: about to return: generic_views.py[255],

I'm inclined to described this as a serious failure because:

short of inserting a print("exception=", exc) there was no way to see what the problem was.
the 100% CPU spin is indefinite in duration.

I'm filing this against asgiref without really knowing if the actual error is in one of the other related parties at this point. I am of course, happy to help diagnose the problem further as needed.

Encls: pip freeze output

$ pip freeze
aiohttp==3.8.6
aiohttp-retry==2.8.3
aiosignal==1.3.1
alembic==1.12.0
amqp==5.1.1
anyio==4.0.0
asgiref==3.7.2
asttokens==2.4.1
async-timeout==4.0.3
attrs==23.1.0
Authlib==1.2.1
autobahn==23.6.2
Automat==22.10.0
azure-common==1.1.28
azure-core==1.29.4
azure-identity==1.13.0
azure-mgmt-core==1.4.0
azure-mgmt-rdbms==10.1.0
azure-mgmt-resource==23.0.1
azure-mgmt-subscription==3.1.1
Babel==2.13.0
backcall==0.2.0
bcrypt==4.0.1
bidict==0.22.1
billiard==4.1.0
blinker==1.6.3
boto3==1.28.62
botocore==1.31.62
Brotli==1.1.0
cachetools==5.3.1
calendra==7.7.1
carehare==1.0.2
celery==5.3.4
certifi==2023.7.22
cffi==1.16.0
channels==4.0.0
channels-rabbitmq==4.0.1
chardet==5.2.0
charset-normalizer==3.3.0
click==8.1.7
click-didyoumean==0.3.0
click-plugins==1.1.1
click-repl==0.3.0
colorama==0.4.6
constantly==15.1.0
convertdate==2.4.0
coverage==7.3.2
cryptography==41.0.4
cssselect==1.2.0
daphne==4.0.0
datadiff==2.2.0
decorator==5.1.1
deepdiff==6.6.0
defusedxml==0.8.0rc2
Deprecated==1.2.14
diff-match-patch==20230430
Django==4.2.6
django-annoying==0.10.6
django-axes==6.1.1
django-csp==3.7
django-excel==0.0.10
django-extra-views==0.14.0
django-filter==23.3
django-formtools==2.4.1
django-import-export==3.3.1
django-ipware==5.0.1
django-jinja==2.11.0
django-jinja-bootstrap-form==4.5.0
django-jsonstore==0.5.1
django-model-utils==4.3.1
django-oauth-toolkit==2.3.0
django-phonenumber-field==7.2.0
django-polymorphic==3.1.0
django-queryable-properties==1.8.4
django-viewflow==1.11.0
djangorestframework==3.14.0
dnspython==2.4.2
drf-spectacular==0.26.5
drf-spectacular-sidecar==2023.10.1
ecdsa==0.18.0
email-validator==2.0.0.post2
et-xmlfile==1.1.0
eventlet==0.33.3
exceptiongroup==1.1.3
executing==2.0.0
Flask==2.2.5
flask-babel==3.1.0
Flask-Compress==1.14
Flask-Gravatar==0.5.0
Flask-Login==0.6.2
Flask-Mail==0.9.1
Flask-Migrate==4.0.5
Flask-Paranoid==0.3.0
Flask-Principal==0.4.0
Flask-Security-Too==5.1.2
Flask-SocketIO==5.3.6
Flask-SQLAlchemy==3.0.5
Flask-WTF==1.1.1
frozenlist==1.4.0
google-api-core==2.12.0
google-api-python-client==2.102.0
google-auth==2.23.3
google-auth-httplib2==0.1.1
google-auth-oauthlib==1.0.0
googleapis-common-protos==1.60.0
greenlet==1.1.2
gunicorn==21.2.0
h11==0.14.0
httpagentparser==1.9.5
httplib2==0.22.0
httptools==0.6.0
hyperlink==21.0.0
idna==3.4
importlib-metadata==6.8.0
incremental==22.10.0
inflection==0.5.1
ipython==8.16.1
isodate==0.6.1
itsdangerous==2.1.2
jaraco.classes==3.3.0
jedi==0.19.1
jeepney==0.8.0
Jinja2==3.1.2
jmespath==1.0.1
jpy @ https://github.com/jpy-consortium/jpy/archive/refs/heads/master.tar.gz#sha256=213ef9a4371136013205390d604aa51b299fce406f5645de7ef077f41803f80d
JPype1==1.4.1
jsonschema==4.19.1
jsonschema-specifications==2023.7.1
jwcrypto==1.5.0
keyring==23.13.1
kombu==5.3.2
ldap3==2.9.1
lml==0.1.0
lunardate==0.2.0
lxml==4.9.3
Mako==1.2.4
MarkupPy==1.14
MarkupSafe==2.1.3
matplotlib-inline==0.1.6
more-itertools==10.1.0
msal==1.24.1
msal-extensions==1.0.0
msgpack==1.0.7
msrest==0.7.1
multicorn @ file:///home/ubuntu/multicorn2-main
multidict==6.0.4
netifaces==0.11.0
networkx==3.1
oauthlib==3.2.2
odfpy==1.4.1
openpyxl==3.0.10
ordered-set==4.1.0
packaging==23.2
paiyroll @ file:///home/ubuntu/repo/source
paiyroll-fdw @ file:///home/ubuntu/repo/source/paiyroll/fdw
pamqp==3.2.1
paramiko==3.3.1
parso==0.8.3
passlib==1.7.4
pdfkit==1.0.0
pexpect==4.8.0
pgadmin4==7.7
phonenumbers==8.13.22
pickleshare==0.7.5
pika==1.3.2
Pillow==9.5.0
platformdirs==3.11.0
portalocker==2.8.2
prompt-toolkit==3.0.39
protobuf==4.24.4
psutil==5.9.5
psycopg==3.1.9
psycopg-binary==3.1.9
psycopg2-binary==2.9.9
ptyprocess==0.7.0
pure-eval==0.2.2
pyasn1==0.5.0
pyasn1-modules==0.3.0
pycparser==2.21
pyexcel==0.7.0
pyexcel-io==0.6.6
pyexcel-ods==0.6.0
pyexcel-webio==0.1.4
pyexcel-xls==0.7.0
pyexcel-xlsx==0.6.0
pyexcel-xlsxw==0.6.1
Pygments==2.16.1
PyJWT==2.8.0
pyluach==2.2.0
PyMeeus==0.5.12
PyNaCl==1.5.0
pyOpenSSL==23.2.0
pyotp==2.9.0
pyparsing==3.1.1
pypng==0.20220715.0
pyquery==2.0.0
pyrabbit==1.1.0
python-consul2==0.1.5
python-dateutil==2.8.2
python-dotenv==1.0.0
python-engineio==4.7.1
python-jose==3.3.0
python-socketio==5.9.0
python3-openid==3.2.0
python3-saml==1.16.0
pytz==2023.3.post1
PyYAML==6.0.1
pyzstd==0.15.9
qrcode==7.4.2
referencing==0.30.2
requests==2.31.0
requests-file==1.5.1
requests-oauthlib==1.3.1
requests-toolbelt==1.0.0
rpds-py==0.10.4
rsa==4.9
s3transfer==0.7.0
SecretStorage==3.3.3
service-identity==23.1.0
setproctitle==1.3.3
simple-websocket==1.0.0
six==1.16.0
sniffio==1.3.0
social-auth-app-django==5.3.0
social-auth-core==4.4.2
speaklater3==1.4
SQLAlchemy==2.0.21
sqlparse==0.4.4
sshtunnel==0.4.0
stack-data==0.6.3
tablib==3.5.0
tblib==2.0.0
terminaltables==3.1.10
texttable==1.7.0
traitlets==5.12.0
twilio==8.9.1
Twisted==23.8.0
txaio==23.1.1
typing_extensions==4.8.0
tzdata==2023.3
ua-parser==0.18.0
uk-postcode-utils==1.1
ukmodulus==0.1.2
uritemplate==4.1.1
urllib3==1.26.17
user-agents==2.2.0
uvicorn==0.23.2
uvloop==0.17.0
vine==5.0.0
watchfiles==0.20.0
wcwidth==0.2.8
websockets==11.0.3
Werkzeug==2.2.3
workalendar==17.0.0
wrapt==1.15.0
wsproto==1.2.0
WTForms==3.0.1
xdg==6.0.0
xlrd==2.0.1
XlsxWriter==3.1.7
xlwt==1.3.0
xmlsec==1.3.13
xmltodict==0.13.0
yarl==1.9.2
zeep==4.2.1
zipp==3.17.0
zope.interface==6.1

django / asgiref

Failure in exception handling in current_thread_executor.py _WorkItem.run() #444