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我将 SignalR 与 redis 背板一起使用。要设置它，我使用简单的代码

var redisConfig = new RedisScaleoutConfiguration("connectionString","eventKey");
GlobalHost.DependencyResolver.UseRedis(redisConfig);

一切正常，但我开始出现以下异常。

Portal UI 中未处理的异常：System.InvalidOperationException：队列已满。在 Microsoft.AspNet.SignalR.Messaging.ScaleoutStream.Send（Func2 send, Object state) at Microsoft.AspNet.SignalR.Infrastructure.Connection.Send(ConnectionMessage message) at Microsoft.AspNet.SignalR.Transports.TransportConnectionExtensions.SendCommand(ITransportConnection connection, String connectionId, CommandType commandType) at Microsoft.AspNet.SignalR.Transports.ForeverTransport.ProcessRequestCore(ITransportConnection connection) at Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequestPostGroupRead(HostContext context, String groupsToken) at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod[T1,T2,T3,TResult](Func4 func, T1 arg1, T2 arg2, T3 arg3) --- 从先前引发异常的位置结束堆栈跟踪 --- 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 在 System.Runtime.CompilerServices。 Microsoft.Owin.Mapping.MapMiddleware.d__0.MoveNext() 处的 TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) --- 从先前引发异常的位置结束堆栈跟踪 --- 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.d__5.MoveNext() --- 从先前抛出异常的位置结束堆栈跟踪--- - 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 在 System.Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware 的 Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）1.<Invoke>d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware1.d__0.MoveNext() --- 从先前抛出异常的位置结束堆栈跟踪---在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task任务）在 Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.d__5.MoveNext() --- 从先前抛出异常的位置结束堆栈跟踪---在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 在 Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.d__2.MoveNext() --- 堆栈跟踪从之前抛出异常的位置结束---在 Microsoft.Owin.Host.SystemWeb.IntegratedPipeline。StageAsyncResult.End(IAsyncResult ar) at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

我查看了 redis 缓存。好像没问题。它有足够的空间。

'队列已满'是什么意思？这是什么队列？如何避免此类异常？

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