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java.lang.ClassCastException: weblogic.jndi.internal.WLEventContextImpl cannot be cast to javax.sql.DataSource	at weblogic.persistence.BasePersistenceUnitInfo.lookUpDataSource(	at weblogic.persistence.BasePersistenceUnitInfo.lookUpDataSources(	at weblogic.persistence.BasePersistenceUnitInfo.init(	at weblogic.persistence.BaseJPAIntegrationProvider.createPersistenceUnitInfo(	at weblogic.persistence.AbstractPersistenceUnitRegistry.storeDescriptors(