The problem described in this Knowledgebase article has been completely fixed since Parallels Plesk 11.5 (see the release notes).
Webserver reconfiguration fails with an error like:
New configuration files for the Apache web server were not created due to the errors in configuration templates: httpd: Syntax error on line 221 of /etc/httpd/conf/httpd.conf: Syntax error on line 8 of /etc/httpd/conf.d/zz010_psa_httpd.conf: Syntax error on line 16 of /usr/local/psa/admin/conf/vhosts_bootstrap.conf: Could not open configuration file /var/www/vhosts/domain13gcl.a10-52-59-230.qa.plesk.ru/conf/13382830970.33967600_httpd.include: Permission denied
Incorrectly set context on the webserver configuration files.
Install the package which provides the semanage utility:
# yum install policycoreutils-python
Change the context type for webserver configuration files:
# semanage fcontext -a -t httpd_sys_content_t "/var/www/vhosts/[^/]*/conf(/.*)?"
Apply your context type changes:
# restorecon -Rv /var/www/vhosts/
Reconfigure webserver configurations:
# /usr/local/psa/admin/sbin/httpdmng --reconfigure-all