I have downloaded mod_jk.so and configured using apxs.
The apache instance is starting fine without
LoadModule jk_module /usr/lib64/apache/modules/mod_jk.so
But facing the error when I uncomment the above line in httpd.conf file
-- Unit httpd@httpdmyinstance01.service has begun starting up.
Apr 30 16:27:33 mylocal.host.com systemd[1]: httpd@httpdmyinstance01.service: main process exited, code=exited, status=1/FAILURE
Apr 30 16:27:33 mylocal.host.com kill[115209]: kill: cannot find process ""
Apr 30 16:27:33 mylocal.host.com systemd[1]: httpd@httpdmyinstance01.service: control process exited, code=exited status=1
Apr 30 16:27:33 mylocal.host.com systemd[1]: Failed to start httpd - httpdmyinstance01.
-- Subject: Unit httpd@httpdmyinstance01.service has failed -- Defined-By: systemd
the issue is, there is a log file for mod_jk module.
and the system is not able to write to that particular log location.(its under root user)
Changed the log location and the issue is fixed.