Sticky sessions not working with JBoss EAP 6.4 Domain + Apache mod_cluster with session replication

[gian.honorio]

I have an environment with a JBoss EAP 6.4 domain controlling 4 nodes, and to perform the load balancing between cluster members I'm using Apache with the mod_cluster. After all configured the application worked correctly with load balancing and session replication, but the sessions are not sticky, every request made by the same client is being sent to a different server, which causes the requests to be very slow and time consuming.

jboss-web.xml

<?xml version="1.0" encoding="UTF-8"?>

<jboss-web xmlns="http://www.jboss.com/xml/ns/javaee"

           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

           xsi:schemaLocation="http://www.jboss.com/xml/ns/javaee http://www.jboss.org/j2ee/schema/jboss-web_6_0.xsd"

           version="6.0">

    <context-root>app/server</context-root>

    <replication-config>

        <replication-trigger>SET_AND_GET</replication-trigger>

        <replication-granularity>SESSION</replication-granularity>

    </replication-config>

</jboss-web>

domain.xml

<subsystem xmlns="urn:jboss:domain:modcluster:1.2">

    <mod-cluster-config advertise-socket="modcluster" proxy-list="192.168.8.91:6666" balancer="appclustergroup" sticky-session="true" sticky-session-force="false" connector="ajp">

        <dynamic-load-provider>

            <load-metric type="busyness"/>

        </dynamic-load-provider>

    </mod-cluster-config>

</subsystem>

httpd.conf

<IfModule manager_module>

        Listen 6666

        ManagerBalancerName appclustergroup

        KeepAliveTimeout 5

        MaxKeepAliveRequests 0

        ProxyPreserveHost On

        ProxyPass / balancer://appclustergroup/app/ stickysession=JSESSIONID|jsessionid

        ProxyPassReverse / balancer://appclustergroup/app/

        ProxyPassReverseCookiePath / /

        <VirtualHost *:6666>

                EnableMCPMReceive on

                AdvertiseFrequency 30

                <Location />

                        Require all granted

                </Location>

                <Location /modcluster_manager>

                        SetHandler mod_cluster-manager

                        Order deny,allow

                        Allow from 192.168.0.0/23

                        Require all granted

                </Location>

        </VirtualHost>

</IfModule>

Am I forgetting anything to make the sticky sessions work properly? Every help is welcome. Thanks!