Handling SQL Integrity Constraint Violation Exceptions This tutorial will guide you through handling `SQLIntegrityConstraintViolationException` when persisting objects that violate database constraints. Step 1: Catch the EJB Exception Catch a `javax.ejb.EJBException` which wraps the underlying exception. try { // persistence transactions } catch (Exception e) { if (e instanceof javax.ejb.EJBException) { logger.debug("Exception instance of javax.ejb.EjbException"); } } Step 2: Get the Underlying Exception Get the underlying exception from the `EJBException` using `e.getCause()`. try { // persistence transactions } catch (Exception e) { if (e instanceof javax.ejb.EJBException) { logger.debug("Exception instance of javax.ejb.EjbException"); Throwable cause = e.getCause(); if (cause != null) { ...