https://www.eclipse.org/lists/eclipselink-users/msg01855.html
RE: [eclipselink-users] TransactionRequiredException in JPA/JSF applicat
eclipselinkusersjpajsf
https://docs.oracle.com/javaee/6/api/javax/transaction/TransactionRequiredException.html
TransactionRequiredException (Java EE 6 )
java ee