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From "Claus Ibsen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CAMEL-11632) QuartzScheduledPollConsumerScheduler causes trigger misfires on each application start
Date Tue, 12 Sep 2017 11:00:01 GMT

    [ https://issues.apache.org/jira/browse/CAMEL-11632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16162796#comment-16162796
] 

Claus Ibsen commented on CAMEL-11632:
-------------------------------------

The existing quartz consumer already does that by checking of the cron/tz was changed and
then only does a reschedule if needed.

> QuartzScheduledPollConsumerScheduler causes trigger misfires on each application start
> --------------------------------------------------------------------------------------
>
>                 Key: CAMEL-11632
>                 URL: https://issues.apache.org/jira/browse/CAMEL-11632
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-quartz2
>    Affects Versions: 2.19.0
>            Reporter: Viktor Khoroshko
>            Assignee: Claus Ibsen
>             Fix For: 2.19.4, 2.20.0
>
>
> Recently I noticed that on application start Quartz founds and triggers misfired triggers:
> {code:java}
> INFO o.s.s.q.LocalDataSourceJobStore - Handling 1 trigger(s) that missed their scheduled
fire-time.
> {code}
> That wasn't not the realistic case in my scenario - since I could see in a database that
NEXT_FIRE_TIME is much ahead of the current time.
> After digging a little I found the issue in the *QuartzScheduledPollConsumerScheduler*:
> {code:java}
>  // Ensure the cron schedule is updated
> CronTrigger newTrigger = existingTrigger.getTriggerBuilder().withSchedule(CronScheduleBuilder.cronSchedule(getCron()).inTimeZone(getTimeZone())).build();
> quartzScheduler.rescheduleJob(triggerKey, newTrigger);
> {code}
> There 2 issues here:
> 1. Job is rescheduled even if nothing has been changed (i.e. cron expression, cron timezone)
> 2.  *existingTrigger.getTriggerBuilder()* returns trigger builder with START_TIME of
existing trigger which, surely, is the past. This is causing the described bug - NEXT_FIRE_TIME
is calculated based on the old START_TIME and is in the past also. So rescheduled trigger
becomes misfired trigger immediately.
> Proposal:
> 1. Do not reschedule job if nothing has been changed.
> 2. If job needs to be rescheduled - make sure to set START_TIME to a current date.



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