Here is an example error from the log for unsubscribe all operation.
[2025-12-15 15:41:02 +0000] [1022464] [ERROR] Error handling request
/mailman3/lists/uclucu-members.ucl.ac.uk/unsubscribe_all
Traceback (most recent call last):
File
"/data/mailman/venv/lib64/python3.12/site-packages/gunicorn/workers/sync.py",
line 134, in handle
self.handle_request(listener, req, client, addr)
File
"/data/mailman/venv/lib64/python3.12/site-packages/gunicorn/workers/sync.py",
line 177, in handle_request
respiter = self.wsgi(environ, resp.start_response)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/wsgi.py",
line 124, in __call__
response = self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/base.py",
line 140, in get_response
response = self._middleware_chain(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/allauth/account/middleware.py",
line 33, in middleware
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/utils/deprecation.py",
line 134, in __call__
response = response or self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/utils/deprecation.py",
line 134, in __call__
response = response or self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/utils/deprecation.py",
line 134, in __call__
response = response or self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/utils/deprecation.py",
line 134, in __call__
response = response or self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/utils/deprecation.py",
line 134, in __call__
response = response or self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/utils/deprecation.py",
line 134, in __call__
response = response or self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/utils/deprecation.py",
line 134, in __call__
response = response or self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/utils/deprecation.py",
line 134, in __call__
response = response or self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django_mailman3/middleware/__init__.py",
line 36, in __call__
response = self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/postorius/middleware.py",
line 42, in __call__
return self.get_response(request)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/exception.py",
line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/core/handlers/base.py",
line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/django/contrib/auth/decorators.py",
line 23, in _wrapper_view
return view_func(request, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/postorius/auth/decorators.py",
line 43, in wrapper
return fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/postorius/views/list.py",
line 1496, in remove_all_subscribers
mlist.unsubscribe(names.email)
File
"/data/mailman/venv/lib64/python3.12/site-packages/mailmanclient/restobjects/mailinglist.py",
line 519, in unsubscribe
response, json = self._connection.call(path, data, method='DELETE')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/mailmanclient/restbase/connection.py",
line 145, in call
response = request(**params, auth=self.auth)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/data/mailman/venv/lib64/python3.12/site-packages/requests/api.py",
line 59, in request
return session.request(method=method, url=url, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/requests/sessions.py", line
589, in request
resp = self.send(prep, **send_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/requests/sessions.py", line
703, in send
r = adapter.send(request, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/requests/adapters.py", line
644, in send
resp = conn.urlopen(
^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/urllib3/connectionpool.py",
line 787, in urlopen
response = self._make_request(
^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/urllib3/connectionpool.py",
line 534, in _make_request
response = conn.getresponse()
^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/urllib3/connection.py", line
565, in getresponse
httplib_response = super().getresponse()
^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.12/http/client.py", line 1430, in getresponse
response.begin()
File "/usr/lib64/python3.12/http/client.py", line 331, in begin
version, status, reason = self._read_status()
^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.12/http/client.py", line 292, in _read_status
line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.12/socket.py", line 720, in readinto
return self._sock.recv_into(b)
^^^^^^^^^^^^^^^^^^^^^^^
File
"/data/mailman/venv/lib64/python3.12/site-packages/gunicorn/workers/base.py",
line 204, in handle_abort
sys.exit(1)
SystemExit: 1
From: Washington Odhiambo <[email protected]>
Sent: 17 December 2025 07:34
To: [email protected]
Cc: Reilly, Liam <[email protected]>
Subject: Re: [MM3-users] Mass operations on large list - Internal Server Error
⚠ Caution: External sender
On Wed, Dec 17, 2025 at 10:25 AM Liam Reilly
<[email protected]<mailto:[email protected]>> wrote:
Hi,
A list owner has reported that their list page for list of 3460 members crashes
with "internal server error" when attempting to do mass operations such as
unsubscribe all or large mass subscribe of many members.
Has anyone else experienced this?
And what did mailmanweb.log file say about this?
--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
In an Internet failure case, the #1 suspect is a constant: DNS.
"Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-)
[How to ask smart questions: http://www.catb.org/~esr/faqs/smart-questions.html]
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