The documentation says the default for stickySessionForce is true looking at the configuration in mod-cluster-jboss-beans.xml:

<property name="stickySessionForce">false</property>

Furthermore the description for stickySessionRemove is unclear:

"Indicates whether the httpd proxy should remove session stickiness in the event that the balancer is unable to route a request to the node to which it is stuck. This property is ignored if stickySession is false. "

This is not clear to me: what does it do? remove session stickiness - from what (session? node? cluster? balancer? proxy?) and for how long (for one fail-over? forever? for that session?)