Spring TaskScheduler not accurate [SPR-6981]

[spring-projects-issues]

Simon Wong opened SPR-6981 and commented

I got the latest task-basic spring samples from svn. I have tried to changed the cron expression to "0/10 * * * * ?" and verify the triggering time. I found that the triggering time is not exactly every ONCE for every 10 seconds. It might execute twice and have some time variation.

Mon Mar 15 11:00:40 CST 2010 <-- correct
Mon Mar 15 11:00:49 CST 2010 <-- incorrect time and also should not trigger, as it is incorrect trigger time
Mon Mar 15 11:00:50 CST 2010 <-- trigger twice??
Mon Mar 15 11:01:00 CST 2010 <-- correct again

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Affects: 3.0.1

Issue Links:

• CronTrigger is not triggered at correct time [SPR-7004] #11669 CronTrigger is not triggered at correct time ("duplicates")