Log files are increasing very fast and do not rotate: open_basedir restriction in effect

Symptoms

• Log rotation does not work for a domain

• Some log files are very big in Plesk > Domains > example.com > File Manager in folder Home directory > logs

• Errors related to open_basedir continuously appear in Domains > example.com > Logs:

  open_basedir restriction in effect. File(/) is not within the allowed path(s): (/var/www/vhosts/example.com/:/tmp/) in /var/www/vhosts/example.com/httpdocs/wp-includes/functions.php on line 1501

Cause

The log rotation is failing as a result of the file's rapid growth.
The PHP errors related to open_basedir restriction are rapidly increasing the log file as website application tries to access root path (' / ') but it's not allowed as open_basedir is set to {WEBSPACEROOT}{/}{:}{TMP}{/}.

Resolution

1. Log into Plesk

2. Navigate to Domains > example.com > PHP Settings and set the value of open_basedir to none

3. Review the website application code so that the open_basedir directive can be safely enabled again