* when the specified user does not exist in the system.
 */
public class FessUserNotFoundException extends FessSystemException {

    /** Serial version UID for serialization compatibility */
    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new FessUserNotFoundException with the specified username.
     *
     * @param username the username that was not found
     */

    }

    @Test
    public void test_serialVersionUID() {
        // Test that the exception has a serialVersionUID field
        FessUserNotFoundException exception1 = new FessUserNotFoundException("user1");
        FessUserNotFoundException exception2 = new FessUserNotFoundException("user2");

        // Both instances should be of the same class
        assertEquals(exception1.getClass(), exception2.getClass());
    }

                    }
                    throw new FessUserNotFoundException(username);
                });
            } else {
                logger.warn("Password change not applied by authentication manager: username={}", username);
            }
        } catch (final FessUserNotFoundException e) {
            throw e;
        } catch (final Exception e) {