vagrant glassfish 4.1 cluster no session replication

I have a problem to implementing a highly available cluster glassfish 4.1 in Centos 6.x

Session's replication doesn't work anyway and availability is skipped on deploy.

When I deploy clusterjsp.war, the glassfishs logs show :

384     INFO    clusterjsp was successfully deployed in 192 milliseconds.(details)         javax.enterprise.system.core   18 janv. 2016 17:37:54.763     {levelValue=800, timeMillis=1453138674763}
383     INFO    visiting unvisited references(details)         javax.enterprise.system.tools.deployment.common       18 janv. 2016 17:37:54.605         {levelValue=800, timeMillis=1453138674605}
382     INFO    ================== availabilityEnabled skipped(details)              18 janv. 2016 17:37:54.543        {levelValue=800, timeMillis=1453138674543}
381     INFO    uploadFileName=clusterjsp.war(details)        org.glassfish.admingui         18 janv. 2016 17:37:54.536     {levelValue=800, timeMillis=1453138674536}
380     INFO    GUI deployment: uploadToTempfile(details)     org.glassfish.admingui         18 janv. 2016 17:37:54.518     {levelValue=800, timeMillis=1453138674518}

================== availabilityEnabled skipped(details), i don't have any more details. The text stay the same.

Multicast works fine, and there are few tutorials about glassfish cluster

I have a Vagrant project which contains scripts used at the below address : vagant cluster 4.1

I’m a java developper and a junior Linux server SysAdmin

any help is welcome!

thanks a lot