ScheduledExecutorService-任务scheduleAtFixedRate停止运行

   // List of active sessions Id for which need to send ping
    private List<Long> activeSessionIds = new ArrayList<>(); 
    
    sessionKeepAliveTask = scheduledExecutorService.scheduleAtFixedRate(() -> {
                log.info("Sending ping for all active sessions");
                var t1 = System.currentTimeMillis();
                this.activeSessionIds.forEach((sessionId) -> {
                    try {
                        this.sendKeepalive(sessionId);
                    } catch (Exception e) {
                        log.error("Error occurred while sending ping for session: {}", sessionId);
                    }
                });
                var t2 = System.currentTimeMillis();
                log.info("Time taken for sending ping for {} sessions: {}", activeSessionIds.size(), (t2-t1));
            }, 1L, 25, TimeUnit.SECONDS);

中的值 activeSessionIds

你知道我在这里遗漏了什么吗?