The connection multiplexer can only be configured once exception

[futurify-ydang]

I have configure second level cache for NHibernate to use redis cache in my project. But i just face The connection multiplexer can only be configured once exception. Can you show me the reason? Thanks

var connectionMultiplexer = ConnectionMultiplexer.Connect("localhost:6379,allowAdmin=true");
            connectionMultiplexer.GetServer("localhost", 6379).FlushAllDatabases();
            RedisCacheProvider.SetConnectionMultiplexer(connectionMultiplexer);
            RedisCacheProvider.SetOptions(new RedisCacheProviderOptions()
            {
                Serializer = new NetDataContractCacheSerializer(),
                CacheConfigurations = new[]
                {
                    new RedisCacheConfiguration("NHibernate.Cache.StandardQueryCache")
                    {
                        Expiration = TimeSpan.FromSeconds(9)
                    }
                }
            });

            cfg.DataBaseIntegration(x =>
            {
                x.ConnectionProvider<DriverConnectionProvider>();
                x.ConnectionStringName = GlobalConstant.DefaultConnectionString;
                x.LogSqlInConsole = true;
                x.LogFormattedSql = true;

                switch (ServerHelper.ServerType)
                {
                    case GlobalConstant.PostgresServer:
                        x.Dialect<PostGis20Dialect>();
                        x.Driver<NpgsqlDriver>();
                        //<property name="hbm2ddl.keywords">none</property>
                        break;

                    case GlobalConstant.MySqlServer:
                        x.Dialect<MySQL57SpatialDialect>();
                        x.Driver<MySqlDataDriver>();
                        break;

                    default:
                        x.Dialect<MsSql2012GeometryDialect>();
                        x.Driver<SqlClientDriver>();
                        break;
                }
            });
            cfg.SetProperty("current_session_context_class", "web");
            cfg.SetProperty("cache.provider_class", "NHibernate.Caches.Redis.RedisCacheProvider, NHibernate.Caches.Redis");            //cfg.SetProperty("cache.provider_class", "NHibernate.Caches.SysCache.SysCacheProvider,NHibernate.Caches.SysCache");
            cfg.SetProperty("cache.use_query_cache", "true");
            cfg.SetProperty("cache.use_second_level_cache", "true");
            cfg.AddAssembly(Assembly.GetExecutingAssembly());

[TheCloudlessSky]

Hey! If RedisCacheProvider.SetConnectionMultiplexer is called more than once, it will throw this exception. So, you're either calling it from somewhere else or the code that you pasted is being called more than once.

[futurify-ydang]

thanks for your comments. I have call it twice so that this exception has been thrown