CODEWITHSUNDEEP
node.jswindowsredisnode-redis
Codedeyya
Codedeyya

Reputation: 361

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

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.

Upvotes: 8

Views: 23127

Answers (13)

Abhishek Shakya
Abhishek Shakya

Reputation: 131

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

Upvotes: 0

Muneeb Ejaz
Muneeb Ejaz

Reputation: 884

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" }

Upvotes: 0

Joel Lim
Joel Lim

Reputation: 1

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.

Upvotes: 0

Tiger
Tiger

Reputation: 1

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 .

Upvotes: 0

Сайф Абаза
Сайф Абаза

Reputation: 21

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]

Upvotes: 1

Iklan Hits
Iklan Hits

Reputation: 101

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/

Upvotes: 0

Merlin Le
Merlin Le

Reputation: 11

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}

Upvotes: 1

Inx Maurya
Inx Maurya

Reputation: 1155

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));

Upvotes: 6

Victor Nwagu
Victor Nwagu

Reputation: 61

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.

Upvotes: 4

Benedetto
Benedetto

Reputation: 749

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.

Upvotes: 2

anonystick
anonystick

Reputation: 362

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

Upvotes: 10

Codedeyya
Codedeyya

Reputation: 361

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

Upvotes: 28

Pavan Singh
Pavan Singh

Reputation: 76

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]

Upvotes: 2

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