Cannot open website hosted in Plesk: 508 Resource limit is reached

Symptoms

• Cannot open the website hosted in Plesk:

  CONFIG_TEXT: 508 Resource limit is reached

• Errors in /var/www/vhosts/system/example.com/logs/error_log:

  CONFIG_TEXT: mod_hostinglimits: Error on LVE enter: LVE(10598) HANDLER(fcgid-script)

Cause

The subscription hits the entry processes limit in the LVE configuration.

Entry processes limit restricts the number of concurrent connections to dynamic (PHP & CGI) scripts for the subscription user.

Resolution

Adjust the limits for system user:

1. Log in to Plesk.

2. Go to Subscriptions > example.com and determine the system user of the subscription:

   

3. Connect to the server via SSH as root.

4. Determine the USER_ID, e.g. 10008:

   # grep -i "johndoe" /etc/passwd
   johndoe:x:10008:1003::/var/www/vhosts/example.com:/bin/false

   Note: johndoe is the system user from step 2.

5. Increase entry processes limit by running:

   # lvectl set 10008 –-maxEntryProcs=50 –save

   Where:

   • 10008 - uid of the subscription user;
   • 50 - new maximum number of connections. The default value is 20.

   Or remove the limits for the user completely:

   # lvectl set 10008 --unlimited