@Override
        public void doWork() {
            try {
                timer.advanceClock(WORK_TIMEOUT_MS);
            } catch (InterruptedException ex) {
                // Ignore.
            }
        }
SystemTimerReaper wraps a {@link Timer} and starts a reaper thread
to expire the tasks in the {@link Timer}.
server-common/src/main/java/org/apache/kafka/server/util/timer/SystemTimerReaper.java