During Enterprise Server Load Balancer installation for Apache on Solaris, the installer updates LD_LIBRARY_PATH in the apachectl script. However, the installer does not correctly write the /usr/lib/mps path. On Solaris, the Apache security instance will not start without this path in LD_LIBRARY_PATH.
This issue exists only on Solaris platforms. To work around the issue, add /opt/SUNWappserver/appserver/lib/lbplugin/lib to your LD_LIBRARY_PATH.