You need to differentiate your clusters. They're distinguished by name, multicast address and multicast port in cluster-service.xml.
The HA-JNDI provider url is used to locate an HA-JNDI server. After that, HA-JNDI lookups use round-robin load balancing throughout the cluster so your requests don't necessarily go to the same HA-JNDI server.
Thank you for your help.
Here is the solution :