The error is from the JGroups which is used for all the master/slave communication. The error itself does not indicate above issue, but can not say for sure. I have not heard of similar issues from our testing. But will investigate further. Let us know if find any further information.
You can ask what ACK message explanations in AS7 or JGroups forums.
Thanks for the info,but there are some more findings around this issue :
When the resource adapter is deployed as a module it does not show up on the Jboss console-resource adapters tab.
This seems like an issue with JBoss domain controller which manages connection definition for modules that are not deployed centrally through the JBoss console.
The exception while loading the metadata is:
Reason: TEIID31097 Metadata load requires a connection factory.
** The other important aspect is when the resource adapter is deployed as rar file with <archive> tag in domain.xml, the rar gets deployed and also shows up on the JBoss Console.