ref="../../javax/persistence/PessimisticLockException.html" title="class in javax.persistence">PessimisticLockException</a></code> - if pessimistic locking
         fails and the transaction is rolled back</dd>
<dd><code><a href="../../javax/persistence/LockTimeoutException.html" title="class in javax.persistence">LockTimeoutException</a></code> - if pessimistic locking
         fails and only the statement is rolled back</dd>
<dd><code><a href="../../javax/persistence/PersistenceException.html" title="clas