javascript - not able to connect to redis in nodejs - Stack Overflow

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First thing first, the details:

node version: v16

Using redislabs cloud (v6.2.3)

npm package redis version 4.0.3

Here's the code...

const redis = require("redis");
require("dotenv").config();

const client = redis.createClient({
  host: process.env.REDIS_URI,
  port: process.env.REDIS_PORT,
  password: process.env.REDIS_PASSWORD
});

client.on("connect", () => {
  console.log("Connected to our redis instance!");
  client.set("iAmAKey", "Value");
});

On running it doesn't output anything :( and just quits simply after some time.

Any help will be appreciated. Thanks!

First thing first, the details:

node version: v16

Using redislabs cloud (v6.2.3)

npm package redis version 4.0.3

Here's the code...

const redis = require("redis");
require("dotenv").config();

const client = redis.createClient({
  host: process.env.REDIS_URI,
  port: process.env.REDIS_PORT,
  password: process.env.REDIS_PASSWORD
});

client.on("connect", () => {
  console.log("Connected to our redis instance!");
  client.set("iAmAKey", "Value");
});

On running it doesn't output anything :( and just quits simply after some time.

Any help will be appreciated. Thanks!

• javascript
• node.js
• redis
• node-redis

Share Improve this question Follow asked Feb 3, 2022 at 14:35 Amresh Prasad SinhaAmresh Prasad Sinha 13611 silver badge77 bronze badges 5

• console.log(process.env) to see if you manage to get them. – ikhvjs Commented Feb 3, 2022 at 14:41
• Yep it logs the var correctly. – Amresh Prasad Sinha Commented Feb 3, 2022 at 14:57
• client.on('error', (err) => console.log('Redis Client Error', err)); Any error from this? – ikhvjs Commented Feb 3, 2022 at 15:00
• Nope no error :( The client is not connecting to redis ig as stated by Guy Rose. But the weird thing is its not throwing error. I cant find any working example now of node-redis which works with redis labs :/ – Amresh Prasad Sinha Commented Feb 3, 2022 at 16:46
• This is correct for the behaviour. You can still bind an event to the client even you didn't connect to the redis server and that's why there is no error. – ikhvjs Commented Feb 4, 2022 at 7:40

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 6

Well, I made it work now. Adding this as a reference for any future wanderer with the same issue.

So the munity suggested to use URL instead.

const redis = require("redis");
require("dotenv").config();

(async () => {
  const client = redis.createClient({
    url: `redis://default:${process.env.REDIS_PASSWORD}@${process.env.REDIS_URI}:${process.env.REDIS_PORT}`,
  });

  client.on("error", (err) => console.log("Redis Client Error", err));

  await client.connect();

  await client.set("key", "value");
  console.log("Redis Connected!")
  const value = await client.get("key");
  console.log(value);
})();

Here's the issue for future reference: Not able to connect to redis-labs cloud redis server #1892

The call to .createClient creates a client but doesn't actually connect to Redis. So the connect event never fires. Node Redis 4.x supports promises so you really don't need the callback at all. You can acplish the same thing with:

const redis = require("redis");
const client = redis.createClient();

await client.connect();
await client.set('foo', 'bar');
let foo = client.get('foo');

Note that I removed the usage of dotenv and just have it connect to Redis on localhost in my sample code for brevity.

additionnel information to @Amresh this is what worked for me:

  url: `redis://${process.env.REDIS_PASSWORD}@${process.env.REDIS_URI}:${process.env.REDIS_PORT}`,

without default word.

I faced the same issue in Node 14 using Redis ^4.3.1. Changing the version to ^3.1.2 worked for me.

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