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Cron triggers fire continuously for hours for some time zones every few milliseconds

See original GitHub issue

Created a Redisson Cron tigger for the Australia/Sydney time zone that will fire at 6PM every day, every week. Cron Expression - 0 0 18 ? * 2,3,4,5,6,7,1 Timezone - Australia/Sydney

Expected behavior Expected that the trigger will fire at 18 every day for sydney only once

Actual behavior With redisson version - 3.17.5 the trigger fires at 18 sydney as expected. But it doesnt stop firing. It fires every few millis for hours together and this drains all our server resources. Are cron expressions evaluated differently now? This was working as expected with redisson version - 3.16.4. We recently upgraded to 3.17.5 and started seeing this issue

Steps to reproduce or test case Create a simple cron trigger for sydney that fires every day at 6Pm with the below call - RScheduledExecutorService.schedule(Runnable task, CronSchedule cronSchedule); Code snippet - final String cronExpr = "0 0 18 ? * 2,3,4,5,6,7,1"; CronSchedule cronSchedule = CronSchedule.of(cronExpr, ZoneId.of("Australia/Sydney")); RScheduledExecutorService executor = redisson.getExecutorService(name(), config.codec(), config.executorOptions()); executor.schedule(task, cronSchedule);

With 3.16.4 the code was - final String cronExpr = "0 0 18 ? * 2,3,4,5,6,7,1"; CronSchedule cronSchedule = CronSchedule.of(cronExpr); cronSchedule.getExpression().setTimeZone(TimeZone.getTimeZone(ZoneId.of("Australia/Sydney"))); RScheduledExecutorService executor = redisson.getExecutorService(name(), config.codec(), config.executorOptions()); executor.schedule(task, cronSchedule);

Redis version redis-server -v Redis server v=7.0.0 sha=00000000:0 malloc=libc bits=64 build=fa9ffba7836907da

Redisson version 3.17.5

Redisson configuration int workers = 10; int executorThreads = 10; long taskRetryIntervalSeconds = TimeUnit.MINUTES.toSeconds(10); long defaultTaskTimeoutSeconds = TimeUnit.HOURS.toSeconds(8);

private int redissonTimeout = 6000;
private int redissonRetryAttempts = 6;
private int redissonRetryInterval = 3000;
private int redissonPingConnectionInterval = 50000;
private long redissonDnsMonitorInterval = 60000;
private int redissonSubscriptionPoolSize = 100;