Hi team,

       I am trying to install mailman 3.3.4, the currently available

latest version at https://docs.mailman3.org/en/latest/install/virtualenv.html on RHEL 7.5.

       As part of the installation, I am not creating any user with the

name *mailman* and instead going with the *root* user only. Along with that I am using the directory */var/lib/mailman* as the root directory. Also, I have rsyslog service running on my machine and using postgresql-11 as the database service.

        My mailman3 service looks like this:

       # cat /etc/systemd/system/mailman3.service

[Unit] Description=GNU Mailing List Manager After=rsyslog.target network.target postgresql-11.service

[Service] Type=forking PIDFile=/var/lib/mailman/var/master.pid User=root Group=root ExecStart=/var/lib/mailman/venv/bin/mailman start ExecReload=/var/lib/mailman/venv/bin/mailman restart ExecStop=/var/lib/mailman/venv/bin/mailman stop

[Install] WantedBy=multi-user.target

         Now, the issue is while I am trying to start the service, it

is showing the below error and the status looks like as following:

          # systemctl start mailman3

Job for mailman3.service failed because a configured resource limit was exceeded. See "systemctl status mailman3.service" and "journalctl -xe" for details.

         # systemctl status mailman3

● mailman3.service - GNU Mailing List Manager Loaded: loaded (/etc/systemd/system/mailman3.service; disabled; vendor preset: disabled) Active: failed (Result: resources) since Wed 2021-06-23 12:51:27 IST; 1min 7s ago Process: 16277 ExecStart=/var/lib/mailman/venv/bin/mailman start (code=exited, status=0/SUCCESS)

Jun 23 12:51:27 psumm3.nic.in mailman[16277]: os.execl(*execl_args) Jun 23 12:51:27 psumm3.nic.in mailman[16277]: File "/usr/lib64/python3.6/os.py", line 527, in execl Jun 23 12:51:27 psumm3.nic.in mailman[16277]: execv(file, args) Jun 23 12:51:27 psumm3.nic.in mailman[16277]: TypeError: expected str, bytes or os.PathLike object, not NoneType Jun 23 12:51:27 psumm3.nic.in mailman[16277]: Starting Mailman's master runner Jun 23 12:51:27 psumm3.nic.in mailman[16277]: Generating MTA alias maps Jun 23 12:51:27 psumm3.nic.in systemd[1]: PID file /var/lib/mailman/var/master.pid not readable (yet?) after start. Jun 23 12:51:27 psumm3.nic.in systemd[1]: Failed to start GNU Mailing List Manager. Jun 23 12:51:27 psumm3.nic.in systemd[1]: Unit mailman3.service entered failed state. Jun 23 12:51:27 psumm3.nic.in systemd[1]: mailman3.service failed.

          I can't understand where the issue might be.

          Thank you in advance.

-- Thanks & Regards, Shashi Kanth.K 9052671936