}
            };
            Runtime.getRuntime().addShutdownHook(shutdownCallback);

            systemMonitorTask = TimeoutManager.getInstance()
                    .addTimeoutTarget(new SystemMonitorTarget(), ComponentUtil.getFessConfig().getSuggestSystemMonitorIntervalAsInteger(),
                            true);

            if (ComponentUtil.getFessConfig().isLogNotificationEnabled()) {

                }
            };
            Runtime.getRuntime().addShutdownHook(shutdownCallback);

            systemMonitorTask = TimeoutManager.getInstance()
                    .addTimeoutTarget(new SystemMonitorTarget(), ComponentUtil.getFessConfig().getThumbnailSystemMonitorIntervalAsInteger(),
                            true);

            if (ComponentUtil.getFessConfig().isLogNotificationEnabled()) {

        logNotificationTarget = new LogNotificationTarget();
        final int interval = ComponentUtil.getFessConfig().getLogNotificationFlushIntervalAsInteger();
        timeoutTask = TimeoutManager.getInstance().addTimeoutTarget(logNotificationTarget, interval, true);
    }

    /**
     * Stops the log notification timer and performs a final flush.
     */
    @PreDestroy
    public void destroy() {

                        .addTimeoutTarget(logNotificationTarget, ComponentUtil.getFessConfig().getLogNotificationFlushIntervalAsInteger(),
                                true);
            }

            if (options.hotThread != null) {
                hotThreadMonitorTask = TimeoutManager.getInstance().addTimeoutTarget(new HotThreadMonitorTarget(), options.hotThread, true);
            }

        sendHeartbeat();

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final int interval = fessConfig.getCoordinatorPollIntervalAsInteger();
        pollTask = TimeoutManager.getInstance().addTimeoutTarget(this::poll, interval, true);

        if (logger.isInfoEnabled()) {
            logger.info("CoordinatorHelper started: instanceId={}", instanceId);
        }
    }

    /**

                        final int interval = fessConfig.getLoadControlMonitorIntervalAsInteger();
                        loadControlMonitorTask =
                                TimeoutManager.getInstance().addTimeoutTarget(new LoadControlMonitorTarget(this), interval, true);
                    }
                }
            }
        }
    }

    /**
     * Gets a map of filtered environment variables.