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Redis Error – It was not possible to connect to the redis server. There was an authentication failure; check that passwords or client certificates.

Today in this article, we will see how to fix Redis error “It was not possible to connect to the redis server. There was an authentication failure; check that passwords or client certificates.“

We will cover few possible resolutions which could help you fix the issue.

Issue Description

Redis connection throws an error,

StackExchange.Redis.RedisConnectionException: ‘It was not possible to connect to the redis server(s). There was an authentication failure; check that passwords (or client certificates) are configured correctly. SocketFailure on localhost:6379/Interactive, Initializing/NotStarted, last: NONE, origin:

Resolution

I found the error is due to configuration settings required for a Redis connection being missing.

Resolution 1

Before trying any fix, please make sure the Redis server is up and running. This error may occur if Redis Server is down or faulted.

Resolution 2

Please make sure your connection details including username and password are accurate.

Resolution 3

Sometimes a network bleep could lead to such connectivity issues. Mainly transient errors are common in cloud environment.

Please make sure resiliency for the connection is implemented.

Please visit: – Best practices for Redis cache management

It’s recommended that if you set abortConnect=false in your connection string.

As default behavior, Redis will auto-reconnect if a network has any transient error occurs.

The default value for abortConnect is true.

I was able to fix the error by using the below code (for .NET). However, you may try identifying similar settings in project based on other language like Java, python or node etc.

var configurationOptions = new ConfigurationOptions
                {
                    EndPoints = { $"{Configuration.GetValue<string>("RedisCache:Host")}: 
                    {Configuration.GetValue<int>("RedisCache:Port")}" },
                    Ssl = true,
                    AbortOnConnectFail = false,
                };
                var multiplexer = ConnectionMultiplexer.Connect(configurationOptions)

Resolution 4

Please re-verify certificates configuration are accurate. Please visit this for more details.

Reference :

• Best practices for Redis cache managment

• Redis-Dependency Injection of the ConnectionMultiplexer

• REDIS CLI COMMANDS

That’s all! Happy coding!

Does this help you fix your issue?

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Happy Coding !!

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