Node Redis does not work on my windows computer even though the server is up and running

Question

const express = require("express");
const redis = require("redis");
const app = express();

const client = redis.createClient({
  url: "redis://[email protected]",
});

client.on("connect", function () {
  console.log("redis connected");
  console.log(`connected ${redisClient.connected}`);
});

client.on("error", (err) => {
  console.log(err);
});

app.listen(process.env.PORT || 3000, () => {
  console.log("Node server started");
});

The above code does not show any connection to redis server even though I have checked the EC2 redis instance by connecting using Redsmin. hosting details in Redsmin

This is a very simple thing to do but the error that I get cannot be googled.

Node server started C:\Users\Sithira_105661\Desktop\Projects\Learning\Redis\node_modules@node-redis\client\dist\lib\client\index.js:387 return Promise.reject(new errors_1.ClientClosedError()); ^

ClientClosedError: The client is closed at Commander._RedisClient_sendCommand (C:\Users\Sithira_105661\Desktop\Projects\Learning\Redis\node_modules@node-redis\client\dist\lib\client\index.js:387:31) at Commander.commandsExecutor (C:\Users\Sithira_105661\Desktop\Projects\Learning\Redis\node_modules@node-redis\client\dist\lib\client\index.js:160:154) at Commander.BaseClass. [as set] (C:\Users\Sithira_105661\Desktop\Projects\Learning\Redis\node_modules@node-redis\client\dist\lib\commander.js:8:29) at Object. (C:\Users\Sithira_105661\Desktop\Projects\Learning\Redis\redis.js:19:8) at Module._compile (node:internal/modules/cjs/loader:1101:14) at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10) at Module.load (node:internal/modules/cjs/loader:981:32) at Function.Module._load (node:internal/modules/cjs/loader:822:12) at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12) at node:internal/main/run_main_module:17:47

Help me understand the issue. Thanks in advance.

Casanova

can you first make sure that the server is reachable with the following CLI cmd: redis-cli -u redis://<url> – Maryannemarybella

Answer 1

finally found the solution. I used node-redis 3.0.0 rather than 4 and the code works fine. I do not know why it does not work in latest node-redis . If any of you guys are getting this issue use node-redis 3

Casanova

thank you bro. I was struggling for 3 days and I was about to go crazy. Even though I did everything completely right, it just wasn't working. and finally "npm i [email protected]" its workkkkk – Mien

Your welcome. I was also struggling with this but luckily stumbled upon the solution. – Casanova

Almost pulled my hair out, thanks so much – Gaekwar

Major version "3" is not supporting the Hash commands – Slater

Damn you save my life and this redis so painful don't tell us any thing. – Diminutive

Answer 2

I used node-redis 3.1.2 rather than 4 and the code works fine.

Rommel

Answer 3

I don't thing we should decrease the version from 4 to 3.

we can use -

const redis = require('redis');

const client = redis.createClient();

   
(async () => {
    await client.connect();
})();

client.on('connect', () => console.log('Redis Client Connected'));
client.on('error', (err) => console.log('Redis Client Connection Error', err));

Tincher

Answer 4

If you're using redis ^4.0.0, you can do this:

const { createClient } = require('redis');
const { REDIS_HOST_URL } = require('../config');

const client = createClient({ url: REDIS_HOST_URL });

(async () => {
    await client.connect();
})();

client.on('connect', () => console.log('::> Redis Client Connected'));
client.on('error', (err) => console.log('<:: Redis Client Error', err));

You can read more on their documentation here.

Diploblastic

Answer 5

Please check your ec2 redis connection

    const client = redis.createClient({
       url: "redis://username:password@ec2_endpoint:port",
     });

Connection string format: redis[s]://[[username][:password]@][host][:port]

Heiduc

Answer 6

You are using a very old version of Redis, an abandoned project by Microsoft called OpenTech Redis.

I suggest you checkout Memurai. Memurai is an up-to-date native Windows port of Redis that derives from that project (see this commit).

Memurai is also available with a free Developer Edition.

Disclaimer: I work in Memurai.

Plumose

Answer 7

In version 4.0.1, we have to add .connect() to run redis.

They have migration guide

This is my code, but it seems to not work well.

async function connectRedis(){

    try {

        const redisURL = '<link-redis-provider>';

        const client = createClient({
           url: redisURL
        });

        await client.connect();
        console.log('Cache is ready');

    } catch (error) {
       console.log('Connect to cache is failed')
    }
}
module.exports = {connectRedis}

Washerwoman

Answer 8

Change to Version 3.1.2

1. remove node_modules and package-lock
2. open package.json
3. edit redis to version 3.1.2 and save it
4. run npm install

if you just want to install direct :

npm i [email protected]

Bend

Answer 9

const redis = require('redis');
const client = redis.createClient({
    host: '<hostname>',
    port: <port>,
    password: '<password>'
});

client.on('error', err => {
    console.log('Error ' + err);
});

you can read detail at here https://docs.redis.com/latest/rs/references/client_references/client_nodejs/

Bookbinding

Answer 10

i think the issue may be due to v4+ using typescript in source code. if your server code is not typescript compatible. could be the issue .

Shel

Answer 11

I had a similar experience. I attributed the cause of the issue with the redis server I am using which is older than 5.0. So, perhaps you are in a similar situation.

According to the node-redis documentation,

"Node Redis should work with older versions of Redis, but it is not fully tested and we cannot offer support." However, "< 5.0" is marked not supported.

Hager

Answer 12

install the redis client 3.1.2 just put 3.1.2 in dependencies in package.json next to redis

"dependencies" : { "redis": "3.1.2" }

Melda

Answer 13

Most of the previous answers point in the correct direction. However, one minor change which caused me an hour to figure out was semi-colon and parenthesis.

Error:

(async () => { client.on('error', (err) => console.log('Redis Client Error', err)); })
    ^
    
TypeError: (intermediate value)(...) is not a function

It was happening due to change in redis package of nodejs. From 4.x.x versions, the API to connect database has significantly changed.

The correct syntax now is:

(async () => { client.on('error', (err) => console.log('Redis Client Error', err)); })();

Inside immediately Invoked Function Expressions (IIFE) require parenthesis to invoke them.

PS: async and await are necessary as Node Redis now uses native Promises by default for all functions.

Documentation: https://github.com/redis/node-redis/blob/master/docs/v3-to-v4.md

Cumberland