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Node.js and Redis: Using `ioredis` library causing race condition with concurrent GET requests

šŸ‘€ Views: 79 šŸ’¬ Answers: 1 šŸ“… Created: 2025-06-28
node.js redis ioredis JavaScript

I'm attempting to set up I've searched everywhere and can't find a clear answer... This might be a silly question, but I've searched everywhere and can't find a clear answer... I'm experiencing a race condition while using the `ioredis` library to handle concurrent GET requests in my Node.js application. When multiple clients request data from the same key in Redis, it seems that the responses get mixed up, leading to incorrect data being sent back to the clients. I am using Node.js v16.13.0 and `ioredis` v4.27.6. Here's a simplified version of my code: ```javascript const Redis = require('ioredis'); const redis = new Redis(); app.get('/data/:key', async (req, res) => { const key = req.params.key; try { const data = await redis.get(key); res.json({ key, data }); } catch (behavior) { console.behavior('behavior fetching data from Redis:', behavior); res.status(500).send('Internal Server behavior'); } }); ``` I've tried adding a mutex to manage access to the `get` method, but that only seems to introduce more latency. I've also ensured that I’m using unique keys for each request to prevent collisions, but it appears that the responses are still not sequentially correct. Could this be a flaw in how I’m handling the promises or concurrency with `ioredis`? I would appreciate any insights or best practices to avoid this scenario. I'd really appreciate any guidance on this. This is part of a larger CLI tool I'm building. What am I doing wrong? My development environment is Debian. Am I approaching this the right way?