You are browsing a read-only backup copy of Wikitech. The primary site can be found at wikitech.wikimedia.org
Aphlict is a realtime-notification service used by Phabricator.
It uses web sockets to establish connections between end user clients and the Phabricator webserver.
This enables it do things like sending notification pop-ups and moving items on dashboards without users having to reload pages.
Rebooting aphlict server
When you reboot a VM running aphlict by simply "reboot", it can happen that the aphlict service does not come back properly after reboot.
In this case the fix is to manually delete the pid file and start the service.
rm /var/run/aphlict/aphlict.pid systemtctl start aphlict
Alternatively, shut the service down and make sure the PID file is gone before rebooting.