I am using spring3.2 for taskscheduling. I am currently run the job for every 3 hours
what i am looking is start the cron job initally when application starts but never again.
and how would i stop the scheduled task if i don't need means?
I am new to the Spring task scheduling. Please help me?
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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 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?
Let me get straight to the question. I have two questions relating to the Quartz Scheduler working with a JDBC job store.
Suppose if my app crashes, I know that quartz will retry the jobs that should have been fired during the down time. What about the jobs that were getting executed at that point of time? And what about the failed retries which were happening? Would they also be handled?
What is this option? - org.quartz.jobStore.maxMisfiresToHandleAtATime in the properties file? Is it the maximum number of misfires that quartz will handle once it comes back up after say a crash?
Thanks in advance
I am using GAE Java for my web application and I need to run a scheduled task every 30 seconds. However, I know that the minimum is 1 minute. Any ideas (and possibly working example ) of how to do that? I've read that you can use Task Queues instead, but couldn't find how to schedule queue tasks.
You can "schedule tasks" by specifying when they should run. They have a parameter that tells it the delay to wait so you create 2 task queues one runs "now" (delay 0) and the other runs with 30sec delay. See the countdown property.https://developers.google.com/appengine/docs/python/taskqueue/tasks#countdown_arg
You can then have the 1minute cron do that.
However, the frontend will never sleep plus you will consume more with the task queues. You can also use a single backend and have it run 2 threads or your own scheduler in a loop. Keep a cron to restart the backend if it goes down (which will after about 15min)
I am using quartz scheduler in my spring project. I have to run a job after another job which is scheduled to run in every 15 mins? I cant run this job concurrently as both of this jobs have to access same mail account using different protocols(one to send:smtp and other to receive: imap) and it may cause problems. Please reply quickly, as its an urgent requirement.
Just write a wrapper job class that launches second job after the first. You could then reuse separate jobs in the future if there will be any necessity.
You could do something with writing a job listener to recognize when the first job ends, and have it start the second. But the solution first suggested by mindas is easier - wrap both your jobs in another Job implementation, which is the one you actually schedule.