created php session directory is not writable by apache
php_admin_value session.save_path /var/clients/client3/web1/tmp directory defined in httpd config is not writable by apache.
ls -ald /var/clients/client3/web1/tmp drwxr-xr-x 2 web1 client3 4096 Nov 26 06:25 /var/clients/client3/web1/tmp