[news.eclipse.rt.eclipselink] Re: Exception when using EclipseLink JPA i

[michael.obrien@xxxxxxxxxx (Michael OBrien)]

Yvon,
  Hi, verify that your persistence-unit provider is explicitly set to 
org.eclipse.persistence.jpa.PersistenceProvider.  It may have defaulted to 
essentials in the past if left out as is the case on GlassFish with 
TopLink Essentials.

See:
http://wiki.eclipse.org/EclipseLink/Examples/JPA/OC4J_Web_Tutorial#Persistence.xml

<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence 
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd";>
 <persistence-unit name="DataBridging" transaction-type="JTA">
   <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
..

   thank you
   /michael