assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    @Test
    public void test_serialization() {
        // Test that the exception has the correct serialVersionUID field

        try {
            helper = ComponentUtil.getLogNotificationHelper();
        } catch (final Exception e) {
            return;
        }

        String throwableStr = null;
        final Throwable thrown = event.getThrown();
        if (thrown != null) {
            final StringWriter sw = new StringWriter();
            thrown.printStackTrace(new PrintWriter(sw));
            throwableStr = sw.toString();

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    @Test
    public void test_serialVersionUID() {
        // Test that exception is serializable
        String message = "Serialization test";

            return null;
        }

        @Override
        public void log(String msg) {
        }

        @Override
        public void log(String message, Throwable throwable) {
        }

        @Override
        public String getServerInfo() {
            return null;
        }

        @Override
        public String getInitParameter(String name) {

            } else if (logger.isInfoEnabled()) {
                logger.info("SuggestCreator is stopped.");
            }
            exitCode = Constants.EXIT_FAIL;
        } catch (final Throwable t) {
            logger.error("SuggestCreator terminated unexpectedly.", t);
            exitCode = Constants.EXIT_FAIL;
        } finally {
            if (systemMonitorTask != null) {

                default:
                    logger.error("Unknown thumbnail result: {} -> {}", thumbnailId, responseData.getUrl());
                    break;
                }
            } catch (final Throwable t) {
                logger.warn("Failed to create thumbnail: {} -> {} ({}:{})", thumbnailId, responseData.getUrl(),
                        t.getClass().getCanonicalName(), t.getMessage());

        }
    }

    private static void assertThrows(final Class<? extends Throwable> expectedType, final Runnable runnable) {
        try {
            runnable.run();
            throw new AssertionError("Expected " + expectedType.getSimpleName() + " to be thrown");
        } catch (final Throwable t) {
            if (!expectedType.isInstance(t)) {

            return null;
        }

        @Override
        public void log(String msg) {
        }

        @Override
        public void log(String message, Throwable throwable) {
        }

        @Override
        public String getServerInfo() {
            return "MockServer/1.0";
        }

        @Override
        public String getInitParameter(String name) {

            events.add(new LogNotificationEvent(((Number) source.get("timestamp")).longValue(), (String) source.get("level"),
                    (String) source.get("loggerName"), (String) source.get("message"), (String) source.get("throwable")));
            docIds.add(hit.getId());
        }

        final int maxDetailsLength = fessConfig.getLogNotificationMaxDetailsLengthAsInteger();

            } else if (logger.isInfoEnabled()) {
                logger.info("ThumbnailGenerator is stopped.");
            }
            exitCode = Constants.EXIT_FAIL;
        } catch (final Throwable t) {
            logger.error("ThumbnailGenerator terminated unexpectedly.", t);
            exitCode = Constants.EXIT_FAIL;
        } finally {
            if (systemMonitorTask != null) {