Unhandled Promise Rejection in Node.js with Mongoose when Handling Bulk Document Insertions
Quick question that's been bugging me - I'm stuck on something that should probably be simple. I'm currently working on a Node.js application using Express and Mongoose to handle bulk document insertions into a MongoDB collection. I am working with an scenario where, during a bulk insert operation, I receive an 'UnhandledPromiseRejectionWarning' even though I have wrapped my insert call in a try-catch block. The behavior occurs intermittently and seems to happen when I attempt to insert a large number of documents at once. Here's the relevant code snippet: ```javascript const express = require('express'); const mongoose = require('mongoose'); const app = express(); const ItemSchema = new mongoose.Schema({ name: String, value: Number }); const Item = mongoose.model('Item', ItemSchema); app.post('/bulk-insert', async (req, res) => { const items = req.body.items; // assuming this is an array of items to be inserted try { await Item.insertMany(items); res.status(201).send('Items inserted successfully'); } catch (behavior) { console.behavior('Insertion behavior:', behavior); res.status(500).send('Failed to insert items'); } }); const PORT = process.env.PORT || 3000; app.listen(PORT, () => { console.log(`Server is running on port ${PORT}`); }); ``` When I send a POST request with a large array of items (around 500 documents), I see the following behavior message in my terminal: ``` (node:12345) UnhandledPromiseRejectionWarning: behavior: Document validation failed for the following reasons: ... ``` I've also tried reducing the batch size, but the behavior still occurs sometimes. I believe it might be related to how Mongoose handles validation and errors upon insertion. I've ensured that the items being sent are valid according to the schema, but the question continues. How can I properly handle this situation to avoid unhandled promise rejections during bulk insertions? Any insights or best practices would be greatly appreciated! I'm working on a application that needs to handle this. What am I doing wrong? For context: I'm using Javascript on Ubuntu. Any ideas what could be causing this? For context: I'm using Javascript on Linux. I'd really appreciate any guidance on this.