Cron running twice for the same job.

[pabloherre]

I have a single job entry in the database, when the server time reach the sleepUnitl time, the job is being executed twice inside the onDocument method.

Here are my settings:

MongoDB Schema

const schema = new Schema(
    {
      name: { type: String, required: true },
      sleepUntil: { type: Date, default: new Date(), required: true },
      interval: { type: String, required: true },
      data: { type: Schema.Types.Mixed }
    },
    {
      timestamps: true
    }
  );

MondoDB Entry

{
    "_id": ObjectId("65d37bbf7933cf20f1064ee3"),
    "name": "JOB_TO_RUN",
    "interval": "0 0 6 * * *",
    "sleepUntil": ISODate("2024-03-19T09:00:00.000Z"),
    "data": {},
    "updatedAt": ISODate("2024-03-01T15:15:14.647Z")
}

Cron job execution code

const { MongoCron } = require('mongodb-cron');

module.exports = async app => {
  const mongooseClient = app.get('mongooseClient');
  const collection = await mongooseClient.connections[0].collections['cron-jobs'];

  const cron = new MongoCron({
    collection,
    onStart: () => console.info('\t✓ Cron jobs.'),
    onDocument: doc => console.count(), // You will get a 2 console logs here!
    onError: async err => console.error(err),
    nextDelay: 1000,
    reprocessDelay: 1000,
    idleDelay: 1000
  });

  cron.start();
};

[origooo]

I'm potentially running into similar behaviour. Does it seem to stop doing it when you increase e.g. nextDelay? For me it seem to ignore the interval if I set a nextDelay. My interval while testing is set to run at 0, 15, 30, and 45 seconds, but with nextDelay (or idleDelay) set to e.g. 10 seconds, it runs every tenth second. The implication of this is that I can't have a reasonable nextDelay set and my CPU usage is getting high...