insertMany with large data

[Navyroot]

I try to insert data with insertMany in Mongoose .

console.log('Starting...')
let data = JournalDetails.find().lean()
    // data maybe over 80000
    JournalDetails.deleteMany({})
    JournalDetails.insertMany(data)
console.log('done Journal details!')

but it alway execute two time when call it(1 time) .

Version

• Mongoose version 5.7.1
• Mongo version 4.0.10
• Node version 8.11.3
• Meteor version 1.8.1

[AbdelrahmanHafez]

My first guess would be that this is an issue with the code calling this code snippet, since the console.log(...); runs twice, this has nothing to do with mongoose. If you could provide a reproduction script that would be very helpful.

[Navyroot]

• Code Server Side

export const migrateDataDecimal = new ValidatedMethod({
 name: 'app.migrateDataDecimal',
 mixins: [CallPromiseMixin],
 validate: null,
 async run() {
   if (Meteor.isServer) {
     console.log('Starting...');
     let data
     data = await Journals.find().lean()
     await Journals.deleteMany({})
     await Journals.insertMany(data)
     console.log('done Journal!');
     return `Success`
   }
 },
})

• Code Client Side
  I called it from client side

// methods on client
migrateData() {
      this.loading = true
      migrateDataDecimal
        .callPromise()
        .then(res => {
          this.loading = false
          console.log('res', res)
        })
        .catch(err => {
          this.loading = false
          console.log('err', err)
        })
}

[AbdelrahmanHafez]

It's not easy for me to reproduce using a client side/server side code kind of thing. There is a lot that could change in my setup that would make my test inaccurate.

Can you abstract your code in a single script that reproduces the issue? An example would look like the first code snippet in #8371 (comment).

[vkarpov15]

So what exactly is the issue here? It looks like your code runs twice, and one of those times it takes longer to execute than the other. Is that the problem, or do you not expect the code to run twice?