[Originally raised against MQ: https://java.net/jira/browse/MQ-346]
During startup, the following entry is written to the log...
2013-10-22 15:27:12,442 WARNING glassfish 4.0 javax.enterprise.resource.resourceadapter.com.sun.enterprise.connectors.jms.util _ThreadID=15;_ThreadName=WrapperSimpleAppMain; jmsra.upgrade_check_failed
...despite this, all of the JMS functionality seems to work fine.
...appears to suggest that the WARN level is inappropriate.