public void stop() {
        try {
            if (start.compareAndSet(true, false)) {
                scheduledFuture.cancel(true);
                FIXED_EXECUTOR_SERVICE.shutdown();
            }
            LOGGER.info("Executable dead job checker stopped!");
        } catch (Throwable t) {
            LOGGER.error("Executable dead job checker stop failed!", t);
        }
    }
fix the job that running is true and gmtModified too old
lts-jobtracker/src/main/java/com/github/ltsopensource/jobtracker/support/checker/ExecutableDeadJobChecker.java