Redis内存不足异常,但仍有大量内存

StackeExchange.Redis 在.NET核心C#项目中与Redis交互的项目。

StackExchange.Redis.RedisServerException: OOM command not allowed when used memory > 'maxmemory'

问题是我们的可用内存量太多了。我们使用Elasticache,因此很容易查找:

我们还可以通过一个shell连接到Elasticache,看到内存可用,并与之进行良好的交互。

    public class RedisTimeConnectionManager : IRedisConnectionManager
{
    // More info about the Lazy<> pattern https://stackoverflow.com/questions/28792196/how-does-connectionmultiplexer-deal-with-disconnects
    // Additional information about the multiplexer: https://github.com/StackExchange/StackExchange.Redis/blob/master/docs/Basics.md
    private static Lazy<ConnectionMultiplexer> RedisConnectionMultiplexer = new Lazy<ConnectionMultiplexer>(() =>
    {
        return ConnectionMultiplexer.Connect(ConnectionString);
    });

    private static string ConnectionString { get; set; }

    public RedisTimeConnectionManager(string connectionString)
    {
        ConnectionString = connectionString;
    }

    public ConnectionMultiplexer GetConnectionMultiplexer()
    {
        return RedisConnectionMultiplexer.Value;
    }

    public IDatabase GetDatabaseConnection()
    {
        return RedisConnectionMultiplexer.Value.GetDatabase();
    }
}

然后我将这个连接层传递给我的redis“时间”管理器。这是引发OOM错误的代码:

public class TimeRedisManager : ITimeRedisManager
{
    private IRedisConnectionManager RedisConnectionManager { get; }

    public TimeRedisManager(IRedisConnectionManager redisConnectionManager)
    {
        RedisConnectionManager = redisConnectionManager;
    }

    public async Task<RedisUserTimelineGetValueDto> GetValueAsync(string id)
    {
        string key = $"time:{id}";

        HashEntry[] entries = await RedisConnectionManager.GetDatabaseConnection().HashGetAllAsync(key);

        // Parse and return values...
    }
}

.NET核心2.1 StackExchange.Redis版本2.0.513

-当这个异常发生时,它会一直发生。重新启动与Redis交互的服务没有任何作用。只有重新启动Elasticache节点才能解决问题。