部署到 centos ，出现错误：【127.0.0.1:6379/0】The operation is not allowed on non-connected sockets about freeim

[wanglixin]

Unhandled exception. System.Exception: 【127.0.0.1:6379/0】The operation is not allowed on non-connected sockets.
---> System.IO.IOException: The operation is not allowed on non-connected sockets.
at System.Net.Sockets.NetworkStream..ctor(Socket socket, FileAccess access, Boolean ownsSocket)
at System.Net.Sockets.NetworkStream..ctor(Socket socket, Boolean ownsSocket)
at FreeRedis.Internal.DefaultRedisSocket.Connect()
at FreeRedis.Internal.DefaultRedisSocket.Write(CommandPacket cmd)
at FreeRedis.RedisClient.SingleInsideAdapter.<>c__DisplayClass5_01.<AdapterCall>b__0() at FreeRedis.RedisClient.LogCall[T](CommandPacket cmd, Func1 func)
at FreeRedis.RedisClient.SingleInsideAdapter.AdapterCall[TValue](CommandPacket cmd, Func2 parse) at FreeRedis.RedisClient.Call[TValue](CommandPacket cmd, Func2 parse)
at FreeRedis.RedisClient.Ping(String message)
at FreeRedis.Internal.RedisClientPoolPolicy.PrevReheatConnectionPool(ObjectPool1 pool, Int32 minPoolSize) --- End of inner exception stack trace --- at FreeRedis.Internal.ObjectPool.ObjectPool1.GetFree(Boolean checkAvailable)
at FreeRedis.Internal.ObjectPool.ObjectPool1.Get(Nullable1 timeout)
at FreeRedis.RedisClient.PoolingAdapter.GetRedisSocket(CommandPacket cmd)
at FreeRedis.RedisClient.PubSub.Subscribe(Boolean psub, String[] channels, Action3 handler) at FreeRedis.RedisClient.Subscribe(String channel, Action2 handler)
at ImServer..ctor(ImServerOptions options) in D:\work\im\ImCore\ImServer.cs:line 61
at ImServerExtenssions.<>c__DisplayClass1_0.b__0(IApplicationBuilder appcur) in D:\work\im\ImCore\ImServer.cs:line 30
at Microsoft.AspNetCore.Builder.MapExtensions.Map(IApplicationBuilder app, PathString pathMatch, Boolean preserveMatchedPathSegment, Action1 configuration) at Microsoft.AspNetCore.Builder.MapExtensions.Map(IApplicationBuilder app, PathString pathMatch, Action1 configuration)
at ImServerExtenssions.UseImServer(IApplicationBuilder app, ImServerOptions options) in D:\work\im\ImCore\ImServer.cs:line 28
at imServer.Startup.Configure(IApplicationBuilder app, ILoggerFactory loggerFactory) in D:\work\im\imServer\Startup.cs:line 35
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.b__0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass15_0.b__1(IApplicationBuilder app)
at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.b__0(IApplicationBuilder app)
at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host)
at imServer.Program.Main(String[] args) in D:\work\im\imServer\Program.cs:line 11