Keith Wall created QPID-6406:
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             Summary: ACO generates attribute set events even if the attribute 
value is not changed
                 Key: QPID-6406
                 URL: https://issues.apache.org/jira/browse/QPID-6406
             Project: Qpid
          Issue Type: Bug
          Components: Java Broker
            Reporter: Keith Wall
            Assignee: Keith Wall


I notice that when updating a single attribute of an object through the Web 
Management UI (for instance, a port's binding address attribute), the 
underlying store is written many times.  Further investigation showed that 
there is a separate save being generated for every attribute sent from the UI 
(which includes values that have no changed).

There is an expression in AbstractConfiguredObject#changeAttributes that 
appears to want to prevent unchanged values causing set attribute events, but a 
logic defect means this is not the case. 



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