I have a Quartz Job that I want to fire every minute. The job itself contains logic to check to see if there is a process to run and if there is, this job could take 45 minutes to complete.
Using a Simple Trigger, will Quartz fire this job off every minute even if there is one already running? Or if the interval is set to 1 minute, does that mean that Quartz will wait 1 minute after the job is done before it fires the next job?
If the trigger is set to fire every minute, it will fire every minute (and a new job instance will be created and invoked).
Unless the related job is marked #DisallowConcurrentExecution.
Related
I want to implement a delay task and found a cadence cron example, how to use cadence to implement a delay task?
Cron is for periodic execution of some functionality.
If you need to delay a task you can call sleep and the beginning of the workflow and then call an activity that executes the task.
Cadence supports both activity and workflow delaying.
Activity delay can be achieved with Workflow.Sleep API
Workflow delay can be achieved with DelayStart option. See https://github.com/uber-go/cadence-client/blob/e66e2d4da8def80e7a5730b824a2de7a28f5c050/internal/client.go#L415
For regular workflows, this will delay execution that many seconds, then start.
For cron workflows, this will delay ONLY the FIRST execution. For example you want to set up an hourly cron workflow but you want it to start running from next week on Monday at 9AM. You can pass delayStart seconds option to delay till that Monday between 8AM and 9AM so it will start at 9AM since it's the next schedule.
I have some scheduled daily running pipelines.
Sometimes the scheduled trigger start time [Run start time] gets offset by few seconds [1s to 5s].
This is happening to all the pipelines having the same trigger.
Some of pipes use IR and some of them don't.
Trying to understand why it's happening.
Ex. Pipeline trigger offset by 1 second
Ashwin, yes this happens sometimes maybe due to a lag / latency between a trigger to start and actual start of a pipeline just like you clicking a button and time taken by the event behind that button to occur
But this does not hamper the execution of your pipeline
I have a ADFV2 trigger that runs every 2 minutes. The pipeline that is called usually takes just over a minute to run but sometimes it takes over 2 minutes but if that happens the trigger kicks in again and runs regardless of the previous trigger still running or not. Is there any way to stop this overlap?
The trigger needs to run every 2 minutes.
Thanks.
There is a concurrency setting in the pipeline definition. Set it to 1. The trigger will create an event, but it will be set to Queued state until previous job completes
I have a Quartz v1.x stateful job. The repeat interval is let's say 1 minute. The job itself typically terminates within a second, but it might happen that it lasts long, let's say 5 minutes. The scheduler prevents parallel run, but when the long running job finishes, it starts it again over and over again those, which were missed during the long running job. In this example, 5 other runs will be scheduled right after the long execution finishes. What I want is to make the scheduler "forget" the missed starts. E.g. if a job starts at 12:00 and finished at 12:05, then simply omit the runs at 12:01, 12:02, 12:03, 12:04, and depending on the exact finish, even 12:05. Is this somehow possible?
I need stateful job for preventing the parallel execution. Stateless job with proper annotation is not an option, because we are using Quartz version 1.x. I already tried playing around with the misfire policies (e.g. MISFIRE_INSTRUCTION_DO_NOTHING), but it seems that these are not intended for such situations. Could anyone help me?
I need to create schedulers to execute jobs(class files) at specified intervals..For Now, I'm using Quartz Scheduler which triggers the jobs at defined intervals from the time of triggering of it.
For Eg: Consider I'm giving a cron expression to run for every one hour starting at morning 9.My first run will be at 9 and my second run will be at 10 and so on.
If my job is taking 20 minutes to execute then in that case this method is not that much efficient.
What I need to do is to schedule a job for every one hour from the completion time of the previously ran job
For Eg: Consider my job to run every one hour is triggered at 9 and for the first run it took 20 minutes to run, so for the next time the job should trigger only at 10:20 instead of 10 (ie., one hour from the completion of previous ran job)
I need to know whether there are any methods in Quartz Scheduling to achieve this or any other logic I need to do.
If anyone could help me out on this,it would be very helpful for me.
You can easily achieve this by job-chaining your job executions. There are various approaches you can choose from:
(1) Implement a Quartz JobListener and in its jobWasExecuted method, that is invoked by Quartz whenever a job finishes executing, re-fire your job.
(2) Look at the Quartz JobChainingJobListener that you can use to implement simple job chaining scenarios. Please note that the functionality of this listener is very limited as it does not allow you to insert delays between job executions, there is no support for conditions that must be met before target jobs are executed etc. But you can use it as a good starting point to implement (1).
(3) Use QuartzDesk (our commercial product) or any other product that allows you to create job chains while externalizing and managing all job dependencies outside of your application. A job chain can have multiple target jobs that can be executed immediately, with a fixed delay or at arbitrary time in the future produced by a JavaScript expression. It also allows you to implement somewhat more sophisticated works flows, such as firing a target job when multiple source jobs complete their execution etc. I am attaching screenshots showing you what a simple job chain that re-executes Job1 with a 1 minute delay upon Job1's completion (with any job execution status) looks like: