"Resource ... has multiple availabilities without an endtime [result returns more than one elements] - will attempt to remove the extra ones" in the JBoss ON server.log file

Issue

• The JBoss ON Server hangs when trying to shut it down;
• The following WARN message is logged in our server.log file:

WARN  [org.rhq.enterprise.server.measurement.AvailabilityManagerBean] (http-/10.33.0.12:7080-22) Resource [Resource[id=10737, uuid=null, type=<null>, key=null, name=null, parent=<null>]] has multiple availabilities without an endtime [result returns more than one elements] - will attempt to remove the extra ones