Empty Infinispan data directories related to session passivation in JBoss EAP 6

Issue

• When using session replication there is no disk writing although it is defined in the configuration?
• The ${jboss.server.data.dir}/infinispan/web/repl directory exists but it is empty
• There is a directory ${jboss.server.data.dir}/infinispan/web/default-host/ but it is empty