Nginx httpd php-fpm issue: site active users are dropped


2016-11-16 13:11:34 UTC


2017-07-03 06:41:30 UTC


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Nginx httpd php-fpm issue: site active users are dropped

Applicable to:

  • Plesk 12.5 for Linux
  • Plesk 11.5 for Linux
  • Plesk 12.0 for Linux


The site active users being dropped and the site page became unavailable.

In the domains proxy_error_log file the following entries can be observed:

2014/12/12 13:41:38 [error] 4459#0: *881104 connect() to unix:/var/www/vhosts/system/ failed (11: Resource temporarily unavailable) while connecting to upstream, client:, server:, request: "GET /in/?u=cm9ja2VuaW5uYW5hbm5lfGlufDI1MHwxfDN8fG5vfDV8dW5kZWZpbmVk HTTP/1.1", upstream: "fastcgi://unix:/var/www/vhosts/system/", host: ""


This is software issue #PPPM-2357


By default, interaction between NGINX and PHP-FPM is configured to use UNIX sockets. Sites with high load are exceeding OS limitations. However, there are no options in Plesk GUI to change from UNIX socket to TCP at the moment. And manual changes in configuration files for domains are getting overwritten by Plesk.

The issue will be fixed in future versions of Plesk.

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  • 0
    Muhammad Hassaan

    When we can except issue to be solved? It generate a big lose for website and revenue. The issue is already 4 months old and identified, then what you are waiting for ??

  • 0
    Lev Iurev

    @Muhammad, we do not have exact ETA for this issue

  • 0
    Muhammad Hassaan

    @Lev for the time being don't provide exact ETA but at-least help us to debug this issue :(

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