Skip to content
  • Solutions
    By Role
    • For Developers
    • For Content Managers
    • For Agencies
    • For IT Admins
    • For Web Hosters
    • For Developers
    • For Content Managers
    • For Agencies
    • For IT Admins
    • For Web Hosters
    By Infrastructure
    • Overview
    • AWS
    • Microsoft Azure
    • Alibaba Cloud
    • Google Cloud Platform
    • Vultr
    • Overview
    • AWS
    • Microsoft Azure
    • Alibaba Cloud
    • Google Cloud Platform
    • Vultr
    • Digital Ocean
    • Linode
    • Upcloud
    • Oracle
    • OVH
    • Digital Ocean
    • Linode
    • Upcloud
    • Oracle
    • OVH
  • Product
    • Plesk Features
    • Plesk Editions
    • What’s new
    • Pricing
    • Roadmap
    • Lifecycle Policy
    • Extensions Catalogue
  • Pricing
  • Extensions
    Featured Extensions
    • SocialBee
    • WP Toolkit
    • Sitejet Builder for Plesk
    • SEO Toolkit
    • Joomla! Toolkit
    • Premium Email
    • Email Security
    • SocialBee
    • WP Toolkit
    • Sitejet Builder for Plesk
    • SEO Toolkit
    • Joomla! Toolkit
    • Premium Email
    • Email Security
    Bundles and packs:
    • Business and Collaboration Edition
    • WP pack
    • Hosting pack
    • Power pack
    • Language pack
    • Business and Collaboration Edition
    • WP pack
    • Hosting pack
    • Power pack
    • Language pack

    See all Extensions

  • For Partners
    • Plesk Contributor Program
    • Plesk Partner Program
    • Affiliate program
    • Plesk University
  • Help Center
    • Documentation
    • Professional Services
    • Support
    • Contact Us
    • Wiki
    • Forum
  • Plesk 360 login
  • Free Trial
  • Pricing
  • Solutions
    • By Role
      • For Developers
      • For Content Managers
      • For Agencies
      • For IT Admins
      • For Web Hosters
    • By Infrastructure
      • Overview
      • Plesk on Amazon Web Services (AWS & Lightsail)
      • Microsoft Azure
      • Alibaba Cloud
      • Google Cloud Platform
      • Vultr
      • DigitalOcean
      • Linode
      • UpCloud
      • Oracle
      • OVH
  • Products
  • Pricing
  • Extensions
    • Featured Extensions
      • SocialBee
      • WP Toolkit
      • Sitejet Builder for Plesk
      • SEO Toolkit
      • Joomla! Toolkit
      • Premium Email
      • Email Security
    • Bundles and packs:
      • Business and Collaboration Edition
      • WP pack
      • Hosting pack
      • Power pack
      • Language pack
      • See all Extensions
  • For Partners
    • Plesk Contributor Program
    • Plesk Partner Program
    • Affiliate Program
    • Plesk University
  • Help Center
    • Documentation
    • Professional Services
    • Support
    • Contact Us
    • Wiki
    • Forum
  • Plesk 360 login
  • Free Trial
  • Pricing
  • Solutions
    • By Role
      • For Developers
      • For Content Managers
      • For Agencies
      • For IT Admins
      • For Web Hosters
    • By Infrastructure
      • Overview
      • Plesk on Amazon Web Services (AWS & Lightsail)
      • Microsoft Azure
      • Alibaba Cloud
      • Google Cloud Platform
      • Vultr
      • DigitalOcean
      • Linode
      • UpCloud
      • Oracle
      • OVH
  • Products
  • Pricing
  • Extensions
    • Featured Extensions
      • SocialBee
      • WP Toolkit
      • Sitejet Builder for Plesk
      • SEO Toolkit
      • Joomla! Toolkit
      • Premium Email
      • Email Security
    • Bundles and packs:
      • Business and Collaboration Edition
      • WP pack
      • Hosting pack
      • Power pack
      • Language pack
      • See all Extensions
  • For Partners
    • Plesk Contributor Program
    • Plesk Partner Program
    • Affiliate Program
    • Plesk University
  • Help Center
    • Documentation
    • Professional Services
    • Support
    • Contact Us
    • Wiki
    • Forum
  • Plesk 360 login
  • Free Trial
Plesk 360 login
Free Trial

Knowledge Base

Unable to access example.com website on the particular PHP version: 503 Service Temporarily Unavailable

 
domainsgophpphp settingsphp fpm

Symptoms

  • Unable to access the example.com website on the particular PHP version:

    503 Service Temporarily Unavailable

  • In an attempt to switch PHP version in Plesk > Domains > example.com > PHP Settings the process fails with the following error:

    Error: phpinimng failed: ERROR:fpm_util:check failed service plesk-phpXX-fpm socket /run/plesk/plesk-phpXX-fpm.sock reason [Errno 111] Connection refused: '/run/plesk/plesk-phpXX-fpm.sock'

  • It is not possible to start affected PHP service with the error below in /var/log/plesk-phpXX-fpm/error.log file:

    ERROR: An another FPM instance seems to already listen on /var/www/vhosts/system/example.com/php-fpm.sock
    ERROR: FPM initialization failed `/var/www/vhosts/system/example.com/php-fpm.sock` failed

Cause

The /var/www/vhosts/system/example.com/php-fpm.sock file is corrupted.

Resolution

  1. Log into the server via SSH.
  2. Remove the /var/www/vhosts/system/example.com/php-fpm.sock file:

    # rm -rf /var/www/vhosts/system/example.com/php-fpm.sock

  3. Log into Plesk.
  4. Go to Domains > example.com > PHP settings.

  5. Switch PHP version to another:
    phpvers.png

  6. Scroll down and press the Apply button.

  7. Switch PHP version back to the required.

  8. Scroll down and press the OK button to apply the changes.

Tweet
Share
Share
Email
0 Shares
Read the full article
Related Posts

Ruby on Rails vs PHP: Which one’s right for your needs?

Read More »

How to Host a Go App on Plesk

Read More »

PHP-FPM: The Future of PHP Handling

Read More »
Knowledge Base

 Website pages based on WordPress show “404 Not Found” when PHP-FPM by Apache is used

Read More »

Websites hosted on Plesk server are unavailable with 502 Bad Gateway: upstream sent too big header while reading response header

Read More »

After switching a website to FPM served by nginx in Plesk, it fails to load with “404 Not Found” on all pages except start page

Read More »

How to change PHP version / handler for a domain or all domains in Plesk

Read More »

Hosting Wiki

  • Django
  • Server Redundancy
  • Google Cloud CDN
  • Bare Metal Server
  • PhpMyAdmin
  • phpPgAdmin
  • Oracle VM Server
  • Server Virtualization Software
  • Windows Server
  • Linux
  • PHP
  • MongoDB
  • Domain
  • Plesk
  • Web Server
  • DNS Server
  • SSH
X-twitter Linkedin Youtube Reddit Github
  • Product
  • Login
  • Pricing
  • Editions
  • For Partners
  • Partner Program
  • Contributor Program
  • Affiliate Program
  • Plesk University
  • Company
  • Blog
  • Careers
  • Events
  • About Plesk
  • Our Brand
  • Resources
  • User and Admin guides
  • Help Center
  • Migrate to Plesk
  • Contact Us
  • Hosting Wiki
  • Forum
  • Legal
  • Legal
  • Privacy Policy
  • Imprint

© 2025 WebPros International GmbH

Part of the WebPros®  Family