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Knowledge Base & Operational DocumentationWhy Does a Hosted Website Return a 502 Error After a PHP Worker Restart?
A 502 response immediately after a PHP worker restart may occur while the service is unavailable, listening on a new socket, or failing to initialize. A proxy can report the failure even if the web server itself remains healthy.
What to check
Compare proxy and PHP service logs, worker startup status, socket path and permissions, process limits, and restart timing. Determine whether all sites on the account are affected or only one pool.
Recommended next step
Correct the startup or socket issue and use a graceful restart where supported. Validate readiness before routing requests back and monitor error rates across affected domains after the change.
How Informatix Systems can help
Informatix Systems provides cloud hosting and server management services. We can assess the affected system, trace relevant dependencies, and help plan a practical correction. Contact us with the platform involved, when the issue began, and non-sensitive error details.