Warnings in the JON agent log "We got a 500 with the following response body back: ..." when managing EAP6 server

Issue

• We are seeing floods of these errors in our agent logs:

2012-09-20 11:21:19,972 WARN  [ResourceContainer.invoker.daemon-2] (rhq.modules.plugins.jbossas7.ASConnection)- We got a 500 with the following response body back: {"outcome" : "failed", "failure-description" : "JBAS014792: Unknown attribute name", "rolled-back" : true}
2012-09-20 11:21:20,057 WARN  [ResourceContainer.invoker.daemon-1] (rhq.modules.plugins.jbossas7.ASConnection)- We got a 500 with the following response body back: {"outcome" : "failed", "failure-description" : "JBAS014792: Unknown attribute name", "rolled-back" : true}