Quartz.NET executing job only once

Question

I am trying to make simple scheduled job in Quartz.NET 2.0

I've read about a similar problem but it didn't work out for me.

The problem is that the job gets executed only once after the StartAt trigger.

Here is my code:

public EntityMappingSvc()
{
    IJobDetail job = JobBuilder.Create<EntityMappingJob>().WithIdentity("QueueJob").Build();
    TriggerBuilder tb = TriggerBuilder.Create();
    tb.WithIdentity("StdTrigger");
    tb.WithSimpleSchedule(a => a.WithIntervalInMinutes(1));
    tb.StartAt(new DateTimeOffset(new DateTime(2012, 11, 20, 10, 55, 0)));
    tb.ForJob(job);
    ITrigger trigger = tb.Build();
    Global.sched.ScheduleJob(job, trigger);
}

protected void Application_Start(object sender, EventArgs e)
{
    Global.factory = new StdSchedulerFactory();
    Global.sched = Global.factory.GetScheduler();
    Global.sched.Start();

    GC.KeepAlive(factory);
    GC.KeepAlive(sched);
}

The job is simple... but to test it i had to raise an error that is caught and handled separate and does not influence the actual job.

After it runs the job the first time, it gets blocked in

while (runnable == null && run)
{
     Monitor.Wait(this, 500);
}
if (runnable != null)
{
     ran = true;
     runnable.Run();
}

in the Run method in SimpleThreadPool.

Any suggestions?

PS: the application is a WCF IIS hosted service.

Edited:

TriggerBuilder tb = TriggerBuilder.Create();
tb.WithIdentity("StdTrigger");
tb.WithCronSchedule("0 1 * * * ?");
tb.StartAt(new DateTimeOffset(new DateTime(2012, 11, 20, 10, 45, 0)));
tb.ForJob(job);
ICronTrigger trigger = tb.Build() as ICronTrigger;
Global.sched.ScheduleJob(job, trigger);

still not working.

same problem.

score 3 · Answer 1 · answered Sep 13 '13 at 10:11

I just had the same issue, the reason your original job was only running the first time with the simple schedule is you need to specify .RepeatForever()

tb.WithSimpleSchedule(a => a.WithIntervalInMinutes(1).RepeatForever());

With the cronschedule you don't need to specify reapeatforever but personally I prefer using the simple schedule where possible as it is a lot more readable.

score 1 · Accepted Answer · answered Nov 20 '12 at 09:16

1

I had a similiar problem. Replace notations:

GC.KeepAlive(factory);
GC.KeepAlive(sched);

with simple static pointer to scheduler:

private static scheduler _scheduler;
...
_scheduler.Start();

answered Nov 20 '12 at 09:16

Johnny_D

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I already did that, the factory and the scheduler are static in Global.asax but are public so that i can instantiate them from the service constructor. – GxG Nov 20 '12 at 09:18
The only difference with my case in trigger type, try cron one. – Johnny_D Nov 20 '12 at 09:21
still nothing, check the edit maybe i did not use the Cron right – GxG Nov 20 '12 at 09:45
2

yeap, you have to specify repeat interval like this via slash `"0 1/1 * * * ?`", which means every minute. – Johnny_D Nov 20 '12 at 09:54
it is aliiiiiiiiiiiiiiive!!! i've been struggling with this for the past 2 days... Thank you so much!!! – GxG Nov 20 '12 at 09:58

Quartz.NET executing job only once

2 Answers2