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

Symptoms

• Cannot open the website hosted in Plesk:

  508 Resource limit is reached

• /var/www/vhosts/system/example.com/logs/error_log contains the following entries:

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

Cause

Subscription hit entry processes limit.

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. Login to Plesk > Subscriptions > example.com and determine system user for the subscription:

2. Connect to the server via SSH as root;

3. Determine the USER_ID:

   # cat /etc/passwd | grep johndoe
   johndoe:x:10008:1003::/var/www/vhosts/example.com:/bin/false

   Note:  johndoe is the system user from step 1

4. Increase entry processes limit by running:

   # lvectl set USER_ID –maxEntryProcs NEW_LIMIT –save

   Where:
   USER_ID – uid of the subscription user;
   NEW_LIMIT – new maximum number of connections. Default value is 20.

   For example:

   # lvectl set 10008 –maxEntryProcs=50 -save

   OR

   Remove the limits for the user, if increasing does not help:

   # lvectl set 10008 –unlimited