How to solve the error when calling redis in golang

Golang is an increasingly popular programming language, and Redis is a popular in-memory database, but during use, you are likely to encounter various bugs and errors. One of the common problems is an error when Golang calls Redis.

First of all, you need to make sure that your project has the relevant dependencies installed correctly. If you are using golang's redis client library, you can install it with the following command:

go get github.com/go-redis/redis

If you get an error when trying to connect to Redis, you should check whether your redis configuration is correct. For example, you need to ensure that the redis service is running on your computer and that information such as port number and password are correctly configured.

Next, let’s take a look at some common errors that may occur when Golang connects to Redis:

1. "dial tcp: i/o timeout"

This The error usually means that the client cannot connect to the redis server. When this happens, you should check a few questions:

• Is your server started
• Is your server running on the correct port
• Does your firewall allow inbound connections to this port?

If you have checked all of these factors and are still unable to connect, consider checking that your network connection is functioning properly and try connecting using a different application to the same server.

2. "ERR invalid password"

If you receive this error, then you need to ensure that the password for the Redis server has been set correctly. In Golang, you can set the password by:

redis.NewClient(&redis.Options{
    Addr:     "localhost:6379",
    Password: "",
    DB:       0,
})

3. "ERR unknown command"

If the command you try to run is not supported by the Redis server, you will encounter this error . Make sure your client code is compatible with the Redis server version.

4. "ERR wrong number of arguments"

You will encounter this error when the command you ask Redis to execute is incorrect. This may be caused by incorrect Redis client code.

5. "ERR max number of clients reached"

If your application's concurrent access to Redis exceeds the maximum number of client connections, you will encounter this error. You can increase the maximum number of connections to resolve this issue. In Golang, you can set the maximum number of connections through the following method:

redis.NewClient(&redis.Options{
    Addr:     "localhost:6379",
    Password: "",
    DB:       0,
    PoolSize: 100,
    MaxRetries: 3,
})

The above are some problems and solutions that may be encountered when Golang connects to Redis. Make sure your Golang code is correctly configured and connected to the Redis server. When you encounter problems, you can use this article as a reference to solve the problem faster.

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