Trigger Error when Triggering immediate Quartz Job with Grails - exception

Question

I am setting up a system where users can request tasks be run asynchronously.
I am storing these tasks in a table in Grails Domain Class ScheduledTask.
I have two Quartz Jobs
CheckForScheduledTasksJob
Triggered every 30 seconds
RunActionJob
Triggered on demand when needed
(In the future there will be a configurable number of these running at a time.)
Currently the code flow is:
CheckForScheduledTasksJob
CheckForScheduledTasksJob {
void execute() {
taskService.checkForScheduledTasks()
}
}
TaskService
void checkForScheduledTasks() {
ScheduledTask scheduleTask = getNextPendingTask()
if (scheduleTask) {
Map params = [ scheduleTask:scheduleTask ]
RunActionJob.triggerNow(params)
}
}
At this point I get the following error:
| Error 2014-01-02 15:00:01,112 [quartzScheduler_QuartzSchedulerThread] ERROR core.ErrorLogger - An error occurred while scanning for the next triggers to fire.
Message: Couldn't acquire next trigger: Couldn't retrieve trigger: com.mypath.RunActionJob
Line | Method
->> 2848 | acquireNextTrigger in org.quartz.impl.jdbcjobstore.JobStoreSupport
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 2759 | execute in org.quartz.impl.jdbcjobstore.JobStoreSupport$40
| 2757 | execute . . . . . . . . . in ''
| 3787 | executeInNonManagedTXLock in org.quartz.impl.jdbcjobstore.JobStoreSupport
| 2756 | acquireNextTriggers . . . in ''
^ 272 | run in org.quartz.core.QuartzSchedulerThread
Caused by JobPersistenceException: Couldn't retrieve trigger: com.mypath.RunActionJob
->> 1533 | retrieveTrigger in org.quartz.impl.jdbcjobstore.JobStoreSupport
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 2808 | acquireNextTrigger in ''
| 2759 | execute . . . . . . . . . in org.quartz.impl.jdbcjobstore.JobStoreSupport$40
| 2757 | execute in ''
| 3787 | executeInNonManagedTXLock in org.quartz.impl.jdbcjobstore.JobStoreSupport
| 2756 | acquireNextTriggers in ''
^ 272 | run . . . . . . . . . . . in org.quartz.core.QuartzSchedulerThread
The code for RunActionJob is still being developed. All it looks like so far is:
class RunActionJob implements InterruptableJob, Serializable {
boolean interrupted = false
static triggers = {
}
void execute(JobExecutionContext context) {
log.info ("HERE " + (new Date()))
ScheduledTask task = context.getMergedJobDataMap()?.scheduleTask
return
}
void interrupt() {
interrupted = true
}
}
Thanks in advance for any help or responses.

Answer 1

By trial and error I eventually found that the cause of this problem was passing the class ScheduledTask in the params. I think that there were serialization errors with the class.
If instead I just passed ScheduledTask.id in the params, and then converted the id to the full object in the RunActionJob, then everything started working as expected.