Example of logged message:

DEBUG [org.hibernate.ejb.AbstractEntityManagerImpl] (pool-1-thread-1) HHH015013: Returning null (as required by JPA spec) rather than throwing EntityNotFoundException, as the entity (org.jboss.as.test.integration.jpa.cfgfile.Employee) does not exist: javax.persistence.EntityNotFoundException: Unable to find org.jboss.as.test.integration.jpa.cfgfile.Employee with id 1

Example exception stack trace is here http://pastebin.com/B6tXEmyK.

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