Is there a way to queue thousands of misfired jobs in quartz scheduler?
I want to avoid having all misfired jobs to fire all at once.
We're using quartz 2.2.1.
Just limit the amount of concurrently executable jobs.
For example set the property org.quartz.threadPool.threadCount to 10 will cause that only 10 jobs could be executed in parallel. I.e. other jobs will be queued (depending on your MisfireInstructions).
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I am using Quartz & Spring Batch framework and scheduled almost 84 jobs. I have noticed recently that some of the jobs are not executing at all when above 80 jobs are scheduled to run.
If I schedule around 30 jobs then each jobs are executing on time and found no issue.
Not sure how to track down the root cause but i believe it could be the issue of unavailability of thread to each jobs. Any idea to sort out this issue ?
You can specify the number of threads:
org.quartz.threadPool.threadCount = 100
Look this post for default thread number: What is the quartz default thread count
I was wondering if is possible to configure quartz to execute a job under a dedicated worker thread. In another words, say I have quartz configured with a SimpleThreadPool of size 5. And I have a job that fires every 10 seconds, and i want a dedicated worker thread to run this job. Is there a way to configure quartz trigger|job|scheduler to do that?
Other workers in thread pool may free to execute any others jobs scheduled.
I want that specific job execute with no time waiting, if other workers are busy.
I have written scheduler jobs to take reports in Quartz. I'm getting exceptions such as the one below whenever I try to take the new report:
"Two repeated jobs are already running"
It won't allow me to start the scheduler. Some of the existing schedules are running repeatedly. How can I find that particular scheduler and stop it in Quartz?
When scheduling a task in Quartz, you have the ability to set misfires and rescheduling. This could be used in the example scenario whereby there is a job that runs every 30 mins, and potentially there could be a backlog and and the job would execute for longer than 30 mins. To prevent the same job running twice you could use the #DisallowConcurrentExecution. Once complete the job would then execute the second instance that is queued by using simpleSchedule().withMisfireHandlingInstructionNowWithExistingCount().
Now in Spring Scheduler there doesn't appear to be this fine grained ability, with just the fixed-rate and fixed-delay options to schedule it every 30 mins or wait 30 mins after the previous job completed. Without using the hammer route of restricting to a single thread, as I want to increase the thread count for other batch jobs to run concurrently, what would be the best method of recreating the Quartz behaviour?
So it looks like with the basic Spring Scheduler there isn't such a mechanism. To do this either use the Spring Quartz Scheduler, or Quartz directly.
Do java Quartz Scheduler support Asynchronous job scheduling.If so,is it by default or have to customize jobs to run asynchronously.
Not only it supports this behaviour but there is basically no other way. Once you schedule a job and a trigger (in any thread) this job will be executed asynchronously in a thread pool. You have some control over that thread pool like the number of threads.
Another issue is parallel execution of the same job. By default the same job can run in multiple threads started by different threads, unless the job is stateful.
Yes and it should be by default. I am using Quartz in my Grails application for my website and it spins off new threads for each job.