There is a typo in the $JBCS_HOME/httpd/conf.d/mod_jk.conf.sample configuration sample that I noticed when doing a review of the LB config guide. It also exists in the documentation, I'll fix that one.

The following comment should say "SSL KEY SIZE" instead of "SSK KEY SIZE":

# JkOptions indicates to send SSK KEY SIZE
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories