In the latest version of Wildfly (8.2.0) there is a warning looking like
[org.jboss.as.txn] (ServerService Thread Pool -- 46) JBAS010153: Node identifier property is set to the default value. Please make sure it is unique.
To get rid of this you have to change the standalone.xml file. Change this part
<subsystem xmlns="urn:jboss:domain:transactions:2.0">
<core-environment>
<process-id>
<uuid/>
</process-id>
</core-environment>
<recovery-environment socket-binding="txn-recovery-environment" status-socket-binding="txn-status-manager"/>
</subsystem>
to look like this
<subsystem xmlns="urn:jboss:domain:transactions:2.0">
<core-environment node-identifier="wildfly1">
<process-id>
<uuid/>
</process-id>
</core-environment>
<recovery-environment socket-binding="txn-recovery-environment" status-socket-binding="txn-status-manager"/>
</subsystem>
Of course you can use any value as identifier and “wildfly1” is just an example. Make sure not to use more than 23 characters.