[Content]: pcntl Usage in Daemonized Queue

[AugustMiller]

Product

Craft CMS

Description

The pcntl extension is actually pretty important for Yii to communicate with the environment about what the process should be doing, especially in daemonized runners.

This section of the Queue page will need an update; Craft’s requirements aren't apt to change, though (Yii itself doesn't mandate it, and the queue code guards against calling functions that aren't enabled).

• [4.x]: pcntl missing from the system report cms#14145

[AugustMiller]

Revisiting this, today, after a user brought up some questions in Discord.

Both systemd and supervisor gently ask processes to quit by sending a SIGTERM, followed by a SIGKILL some number of seconds later that bypasses Yii's handlers and halts the process immediately.

• systemd — May need a longer TimeoutStopSec;
• supervisor — The equivalent setting appears to be stopwaitsecs;

I'm still not sure what specific values we should recommend. Same as the queue component or job’s ttr setting?