I have two nodes setup in a cluster using TCP port 7600 and I see them join the cluster in the logs. On Master: [Host Controller] 15:07:18,293 INFO [org.jboss.as.domain.controller] (Host Controller Service Threads - 7) WFLYHC0019: Registered remote slave host "dev-slave1", JBoss Keycloak 6.0.1 (WildFly 8.0.0.Final) On Slave: [Host Controller] 15:03:12,603 INFO [org.jboss.as.host.controller] (Host Controller Service Threads - 3) WFLYHC0148: Connected to master host controller at remote://10.10.10.77:9999 In the WildFly admin panel I see the server group: auth-server-group which is ha and then I see both servers in the group and they are both green. I've set the distributed-cache setup to 2 in domain.xml, so it should be sharing session information: <distributed-cache name="sessions" owners="2"/> <distributed-cache name="authenticationSessions" owners="2"/> <distributed-cache name="offlineSessions" owners="2"/> <distributed-cache name="clientSessions" owners="2"/> <distributed-cache name="offlineClientSessions" owners="2"/> <distributed-cache name="loginFailures" owners="2"/> <distributed-cache name="actionTokens" owners="2"> Here is the logs on the master showing there a new cluster has been received: 2019-08-26 15:03:19,776 INFO [org.infinispan.CLUSTER] (MSC service thread 1-1) ISPN000094: Received new cluster view for channel ejb: [dev-master|0] (1) [dev-master] 2019-08-26 15:03:19,779 INFO [org.infinispan.CLUSTER] (MSC service thread 1-3) ISPN000094: Received new cluster view for channel ejb: [dev-master|0] (1) [dev-master] 2019-08-26 15:03:19,780 INFO [org.infinispan.CLUSTER] (MSC service thread 1-2) ISPN000094: Received new cluster view for channel ejb: [dev-master|0] (1) [dev-master] 2019-08-26 15:03:19,780 INFO [org.infinispan.CLUSTER] (MSC service thread 1-4) ISPN000094: Received new cluster view for channel ejb: [dev-master|0] (1) [dev-master] 2019-08-26 15:03:19,875 INFO [org.infinispan.CLUSTER] (MSC service thread 1-1) ISPN000094: Received new cluster view for channel ejb: [dev-master|0] (1) [dev-master] And on the slave: 2019-08-26 15:07:29,567 INFO [org.infinispan.CLUSTER] (MSC service thread 1-2) ISPN000094: Received new cluster view for channel ejb: [dev-slave1|0] (1) [dev-slave1] 2019-08-26 15:07:29,572 INFO [org.infinispan.CLUSTER] (MSC service thread 1-3) ISPN000094: Received new cluster view for channel ejb: [dev-slave1|0] (1) [dev-slave1] 2019-08-26 15:07:29,572 INFO [org.infinispan.CLUSTER] (MSC service thread 1-4) ISPN000094: Received new cluster view for channel ejb: [dev-slave1|0] (1) [dev-slave1] 2019-08-26 15:07:29,574 INFO [org.infinispan.CLUSTER] (MSC service thread 1-1) ISPN000094: Received new cluster view for channel ejb: [dev-slave1|0] (1) [dev-slave1] 2019-08-26 15:07:29,635 INFO [org.infinispan.CLUSTER] (MSC service thread 1-3) ISPN000094: Received new cluster view for channel ejb: [dev-slave1|0] (1) [dev-slave1] I believe I read somewhere that I was supposed to see the master and slave together in the logs an not just master or slave. Maybe this is my issue, but I don't know how to resolve it. I can't use multi-cast as it's disabled in AWS and almost all cloud providers. When I launch the master and let it come up, then launch the slave I can see all the traffic for the session on the master. As soon as I stop the master, the slave is looking for the master, but when I click on the website, it just hangs waiting for a connection and then eventually logs me out, and I end up logging back in, and now I'm on the slave node. The shared sessions are not happening. Is there something else I need to do or set? I have this setup in my domain.xml configuration as well: <server-group name="auth-server-group" profile="ha"> <jvm name="default"> <heap size="64m" max-size="512m"/> </jvm> <socket-binding-group ref="ha-sockets"/> <system-properties> <property name="jboss.cluster.tcp.initial_hosts" value="10.10.10.77[7600],10.10.10.27[7600]"/> </system-properties> </server-group> In my host.xml on the slave I have this setup to reach back to the master as the domain controller <domain-controller> <remote protocol="remote" host="${jboss.domain.master.address}" port="${jboss.domain.master.port:9999}" security-realm="ManagementRealm"/> </domain-controller> Any help would be appreciated