How are you refreshing the object?  Are you using EntityManager.refresh()?

EclipseLink caches by default.  To disable the shared cache use the persistence.xml property,
"eclipselink.cache.shared.default"="false"

Although disabling the shared cache is not normally the best idea.  You can refresh an object using EntityManager.refresh() or the Query hint "eclipselink.refresh"="true".  EclipseLink also has cache invalidation, several different caching types, clustered cache coordination, and other options.

Are you using the same EntityManager?  An EntityManager normally represents a transaction context, and will cache all objects locally read through it.  You should normal get a new EntityManager per transaction or per request.

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James
http://www.nabble.com/EclipseLink---Users-f26658.html