Symptoms
Apache does not start:
[root@websrv01 ~]# /etc/init.d/httpd start Starting httpd: [Thu Jun 08 08:58:08 2017] [notice] POA VHosts: module has registered its hooks.
httpd.worker: Syntax error on line 574 of /etc/httpd/conf/httpd.conf: Syntax error on line 1 of /etc/httpd/conf.d/modhostinglimits.conf: Cannot load /etc/httpd/modules/mod_hostinglimits.so into server: /etc/httpd/modules/mod_hostinglimits.so: undefined symbol: ap_runtime_dir_relative
[FAILED]
Cause
The package "mod_hostinglimits-1.0-32" is incompatible with "httpd-2.2".
Resolution
Downgrade "mod_hostinglimits" to version 1.0-27:
yum downgrade mod_hostinglimits
To avoid Apache crash during updates\hotfixes installation, exclude "mod_hostinglimits" from yum processing, having added the line to /etc/yum.conf:
exclude=mod_hostinglimits*