[Pkg-mailman-hackers] Bug#1014037: mailman3-web: Possible memory leak: uwsgi OOMs after a few weeks

[Peter Chubb]

Package: mailman3-web
Version: 0+20200530-2
Severity: normal

Dear Maintainer,

 I have a mailman3 system backed by PostGRES, exim4, and nginx; 
 and it is set up and works properly.  However, the uwsgi process
 keeps growing and growing until the system OOMs. typically 
 after two to three weeks.

 I added more RAM (the system now has 3Gb) but that postponed 
 but did not fix the problem.  As a workaround I now restart 
 the mailman3 service once a day.

-- System Information:
Debian Release: bookworm/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.17.0-3-cloud-amd64 (SMP w/1 CPU thread; PREEMPT)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages mailman3-web depends on:
ii  dbconfig-sqlite3           2.0.21
ii  debconf [debconf-2.0]      1.5.79
ii  init-system-helpers        1.63
ii  lsb-base                   11.2
ii  python3                    3.9.8-1
hi  python3-django-hyperkitty  1.3.4-4
ii  python3-django-postorius   1.3.5-1
ii  python3-psycopg2           2.9.2-2
ii  python3-whoosh             2.7.4+git6-g9134ad92-5
ii  ucf                        3.0043
ii  uwsgi-core                 2.0.20-4+b2
ii  uwsgi-plugin-python3       2.0.20-4+b2

Versions of packages mailman3-web recommends:
ii  nginx               1.20.2-2
ii  nginx-core [nginx]  1.20.2-2+b1

Versions of packages mailman3-web suggests:
ii  postgresql  14+241

-- debconf information:
* mailman3-web/passwords-do-not-match:
  mailman3-web/nginx-choice:
  mailman3-web/install-error: abort
* mailman3-web/pgsql/authmethod-admin: ident
  mailman3-web/remote/port:
* mailman3-web/db/app-user: mailman3web at localhost
* mailman3-web/superuser-mail: listadmin at sel4.systems
* mailman3-web/configure-webserver: none
  mailman3-web/db/basepath:
* mailman3-web/emailname: sel4.systems
  mailman3-web/upgrade-backup: true
  mailman3-web/dbconfig-upgrade: true
  mailman3-web/pgsql/no-empty-passwords:
  mailman3-web/remove-error: abort
  mailman3-web/mysql/method: Unix socket
* mailman3-web/pgsql/admin-user: postgres
* mailman3-web/pgsql/method: Unix socket
* mailman3-web/pgsql/authmethod-user: ident
* mailman3-web/db/dbname: mailman3web
* mailman3-web/restart-webserver: true
  mailman3-web/internal/reconfiguring: false
* mailman3-web/superuser-name: seL4
  mailman3-web/pgsql/manualconf:
  mailman3-web/dbconfig-remove: true
* mailman3-web/dbconfig-install: true
  mailman3-web/remote/host: localhost
  mailman3-web/missing-db-package-error: abort
  mailman3-web/remote/newhost:
  mailman3-web/pgsql/changeconf: false
  mailman3-web/mysql/admin-user:
  mailman3-web/upgrade-error: abort
  mailman3-web/purge: false
* mailman3-web/dbconfig-reinstall: true
  mailman3-web/mysql/authplugin: default
* mailman3-web/database-type: pgsql
  mailman3-web/internal/skip-preseed: false