* This prevents stack trace generation for this exception type.
     *
     * @return null to skip stack trace generation
     */
    @Override
    public synchronized Throwable fillInStackTrace() {
        return null;
    }

                    source.put("level", event.getLevel());
                    source.put("loggerName", event.getLoggerName());
                    source.put("message", event.getMessage());
                    source.put("throwable", event.getThrowable() != null ? event.getThrowable() : "");
                    source.put("timestamp", event.getTimestamp());
                    bulkRequest.add(client.prepareIndex().setIndex(indexName).setSource(source));

                }
                jobLog.setScriptResult(ret.toString());
            }
            jobLog.setJobStatus(Constants.OK);
        } catch (final Throwable t) {
            logger.warn("Failed to execute job: id={}, script={}", id, script, t);
            jobLog.setJobStatus(Constants.FAIL);

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

    @Test
    public void test_stackTraceForMessageOnlyConstructor() {
        // Test that stack trace is not writable when using message-only constructor

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

    @Test
    public void test_constructor_withVariousExceptionTypes() {
        // Test constructor with different exception types as cause
        String message = "SSO process failed";

            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) {

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

    @Test
    public void test_stackTrace() {
        // Test that stack trace is properly set
        DictionaryException exception = new DictionaryException("Stack trace test");

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

    @Test
    public void test_stackTraceWithCause() {
        // Test that stack trace is properly preserved with cause
        String innerMessage = "Inner exception";

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

    @Test
    public void test_stackTrace() {
        // Test that stack trace is generated properly
        LdapConfigurationException exception = new LdapConfigurationException("Stack trace test");

            fail("Should have thrown an exception for unregistered class");
        } catch (Exception e) {
            // Find the root cause - it should be related to unregistered class
            Throwable rootCause = e;
            while (rootCause.getCause() != null && rootCause.getCause() != rootCause) {
                rootCause = rootCause.getCause();
            }
            String message = rootCause.getMessage();