CODEWITHSUNDEEP
node.jsscheduler
Umesh Sehta
Umesh Sehta

Reputation: 10659

How node-scheduler working in this scenerio

I am new in NodeJs and now I want to use node-scheduler, but i have just one query, please give me suggestion regarding this.

https://github.com/node-schedule/node-schedule

When I setup a scheduler that run in every 5 Minutes, If the scheduler does 
not completed within 5 minutes. So my question is that then the scheduler 
will start another thread or not?

Please solve my query.

Thanks.

Upvotes: 1

Views: 401

Answers (1)

robertklep
robertklep

Reputation: 203514

Since jobs don't seem to have a mechanism to let the scheduler know they are done, jobs will be scheduled according to their scheduled time alone.

In other words: if you schedule a job to run every 5 minutes, it will be started every 5 minutes, even if the job itself takes more than 5 minutes to complete.

To clarify: this doesn't start a new thread for each job, as JS is single-threaded. If a job blocks the event loop (for instance by doing heavy calculations), it is possible for the scheduler to not be able to start a new job when its time has arrived, but blocking the event loop is not a good thing.

Upvotes: 2

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