When starting JBoss Data Grid 6 server, WARN messages are printed like "Ignoring XML attribute isolation, please remove from configuration file"

Issue

• When starting datagrid 6 server I see the following warn messages:

12:32:59,007 WARN  [org.jboss.as.clustering.infinispan.subsystem] (ServerService Thread Pool -- 20) Ignoring XML attribute isolation, please remove from configuration file

• What config change do i have to make? I tried removing the isolation attribute from the locking element here:

<distributed-cache name="default" mode="SYNC" segments="20" owners="2" remote-timeout="30000" start="EAGER">
    <locking acquire-timeout="30000" concurrency-level="1000" striping="false"/>
    <transaction mode="NONE"/>
    <compatibility enabled="true"/>
</distributed-cache>

But it didn't make any difference.