Apache Httpd failed to start with "Cannot load mod_security2 module" error on RHEL 8 or 9

Solution Verified - Updated -

Issue

  • After yum update Apache Httpd on RHEL 8.x or 9.x failed to start with below error.
Jul 06 11:00:47 localhost httpd[852468]: httpd: Syntax error on line 163 of /etc/httpd/conf/httpd.conf: Syntax error on line 1 of /etc/httpd/conf.modules.d/10-mod_security.conf: Cannot load modules/mod_security2.so into server: libyajl.so.2: cannot open shared object file: No such file or directory
  • mod_security module in Apache Httpd preventing it from starting with libyajl dependency error.

Environment

  • Red Hat Enterprise Linux (RHEL)
    • 8.x
    • 9.x
  • RHEL Apache httpd 2.4.x
  • Red Hat JBoss Core Services (JBCS) Apache httpd
    • 2.4.x
  • mod_security

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