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Technical issues regarding Quartz Scheduler

jonrand pajo

Joined: Mar 15, 2010
Posts: 1
We are facing some technical issues regarding Quartz Scheduler.

Set up :
We have 3 jboss app servers, which are load balanced and each having a quartz scheduler associated to them. These schedulers use JobStoreCMT way of storing the jobs and retrieving. We have a job say 'X'. We have a cron trigger associated with this job X to be scheduled daily at 0000 hrs.

Issue faced :
1) When this job X starts executing after sometime we see that another instance of the same job X is executing at a difference of 5 to 10 mins. 2) We have seen instances when misfire of job has occurred, still the job has started to execute as per the scheduled time.
3) At some instances we have found that when misfire occur, the scheduler returns the Trigger as SimpleTrigger rather than CronTrigger

Queries :
1) How is misfire triggered in a scheduler?
2) How do schedulers interact in a load balanced environment?
Rob Spoor

Joined: Oct 27, 2005
Posts: 20273

Let's move this to Other Open Source Projects.

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Martijn Verburg

Joined: Jun 24, 2003
Posts: 3275

Hi Jonrand and Welcome to Javaranch. What version of Quartz are you using? Are you using the one bundled with Jboss?

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