Creating 2nd connection to to Redis sentinel deployment using the same ConfigurationOptions instance fails with exception. (original) (raw)

Creating 2nd connection to to Redis sentinel deployment using the same ConfigurationOptions instance fails with exception.

What is expected

Creating multiple connections with the same configuration instance should succeed.

What is observed

Failure with exception.
It looks like ConfigurationOptions instance passed to ConnectionMultiplexer.Connect is getting modified.

NOTE: Cloning ConfigurationOptions before connect also does not work.

Setup

Redis sentinel deployment with 2 slaves : Docker compose is attached.
OS : Ubuntu 20.04 LTS
.NET Core Version : 3.1.25
Redis NuGet Package Version: StackExchange.Redis 2.5.61

Start the sentinel cluster with default sentinel port

docker-compose up --scale redis-sentinel=3 -d

Run the below sample application.
Demo sample program

using System; using System.IO; using System.Net; using System.Net.NetworkInformation; using System.Runtime.InteropServices; using StackExchange.Redis;

namespace netcore31 { class Program { static void Main(string[] args) { ConfigurationOptions configurationOptions = ConfigurationOptions.Parse("localhost"); configurationOptions.ServiceName = "mymaster"; configurationOptions.Password = "str0ng_passw0rd";

        // 1st Connection
         using var firstConnection = ConnectionMultiplexer.Connect(configurationOptions);
         System.Console.WriteLine(firstConnection.GetStatus());
         IDatabase database = firstConnection.GetDatabase();
         database.StringSet("SomeKey","SomeValue");
         System.Console.WriteLine(database.StringGet("SomeKey"));

         
         // Eastblishing second connection 2nd throws exception
         using var secondConnection = ConnectionMultiplexer.Connect(configurationOptions);
        
         System.Console.WriteLine(secondConnection.GetStatus());
  }

} }

ConfigurationOptions object passed to ConnectionMultiplexer.Connect is getting changed hence

https://hub.docker.com/r/bitnami/redis-sentinel/

version: '2'

networks: app-tier: driver: bridge

services: redis: image: 'bitnami/redis:latest' environment: - REDIS_REPLICATION_MODE=master - REDIS_PASSWORD=str0ng_passw0rd networks: - app-tier ports: - '6379' redis-slave: image: 'bitnami/redis:latest' environment: - REDIS_REPLICATION_MODE=slave - REDIS_MASTER_HOST=redis - REDIS_MASTER_PASSWORD=str0ng_passw0rd - REDIS_PASSWORD=str0ng_passw0rd ports: - '6379' depends_on: - redis networks: - app-tier redis-sentinel: image: 'bitnami/redis-sentinel:latest' environment: - REDIS_MASTER_PASSWORD=str0ng_passw0rd depends_on: - redis - redis-slave ports: - '26379-26381:26379' networks: - app-tier