Getting a lot of IOExceptions even if there are no messages to receive

[paulreicherdt-annalect]

Hello,

suddently, we face an issue where we got a lot of IOExceptions even if there are no messages to receive/process. All the exceptions have the same pattern:

System.IO.IOException: The AMQP transport failed to open because the inner transport tls3 is closed. at Microsoft.Azure.Amqp.ExceptionDispatcher.Throw(Exception exception) at Microsoft.Azure.Amqp.AsyncResult.End[TAsyncResult](IAsyncResult result) at Microsoft.Azure.Amqp.Transport.AmqpTransportInitiator.ConnectAsyncResult.End(IAsyncResult result) at Microsoft.Azure.Amqp.Transport.AmqpTransportInitiator.<>c.b__17_1(IAsyncResult r) at System.Threading.Tasks.TaskFactory1.FromAsyncCoreLogic(IAsyncResult iar, Func2 endFunction, Action1 endAction, Task1 promise, Boolean requiresSynchronization) --- End of stack trace from previous location --- at Azure.Messaging.ServiceBus.Amqp.AmqpConnectionScope.CreateAndOpenConnectionAsync(Version amqpVersion, Uri serviceEndpoint, Uri connectionEndpoint, ServiceBusTransportType transportType, IWebProxy proxy, String scopeIdentifier, TimeSpan timeout) at Microsoft.Azure.Amqp.FaultTolerantAmqpObject1.OnCreateAsync(TimeSpan timeout, CancellationToken cancellationToken) at Microsoft.Azure.Amqp.Singleton1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken) at Microsoft.Azure.Amqp.Singleton1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.Amqp.AmqpConnectionScope.OpenReceiverLinkAsync(String identifier, String entityPath, TimeSpan timeout, UInt32 prefetchCount, ServiceBusReceiveMode receiveMode, String sessionId, Boolean isSessionReceiver, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.Amqp.AmqpReceiver.OpenReceiverLinkAsync(TimeSpan timeout, UInt32 prefetchCount, ServiceBusReceiveMode receiveMode, String identifier, CancellationToken cancellationToken) at Microsoft.Azure.Amqp.FaultTolerantAmqpObject1.OnCreateAsync(TimeSpan timeout, CancellationToken cancellationToken) at Microsoft.Azure.Amqp.Singleton1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken) at Microsoft.Azure.Amqp.Singleton1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken) at Microsoft.Azure.Amqp.Singleton1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken) at Microsoft.Azure.Amqp.Singleton1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.Amqp.AmqpReceiver.ReceiveMessagesAsyncInternal(Int32 maxMessages, Nullable1 maxWaitTime, TimeSpan timeout, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.Amqp.AmqpReceiver.ReceiveMessagesAsyncInternal(Int32 maxMessages, Nullable1 maxWaitTime, TimeSpan timeout, CancellationToken cancellationToken) --- End of inner exception stack trace --- at Azure.Messaging.ServiceBus.Amqp.AmqpReceiver.ReceiveMessagesAsyncInternal(Int32 maxMessages, Nullable1 maxWaitTime, TimeSpan timeout, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.Amqp.AmqpReceiver.<>c.<<ReceiveMessagesAsync>b__44_0>d.MoveNext() --- End of stack trace from previous location --- at Azure.Messaging.ServiceBus.ServiceBusRetryPolicy.RunOperation[T1,TResult](Func4 operation, T1 t1, TransportConnectionScope scope, CancellationToken cancellationToken, Boolean logTimeoutRetriesAsVerbose) at Azure.Messaging.ServiceBus.ServiceBusRetryPolicy.RunOperation[T1,TResult](Func4 operation, T1 t1, TransportConnectionScope scope, CancellationToken cancellationToken, Boolean logTimeoutRetriesAsVerbose) at Azure.Messaging.ServiceBus.Amqp.AmqpReceiver.ReceiveMessagesAsync(Int32 maxMessages, Nullable1 maxWaitTime, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.ServiceBusReceiver.ReceiveMessagesAsync(Int32 maxMessages, Nullable`1 maxWaitTime, Boolean isProcessor, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.ReceiverManager.ReceiveAndProcessMessagesAsync(CancellationToken cancellationToken) }

And we are not sure where we need to look into... ports, firewall, another protocoll? We use ServiceBusTransportType.AmqpWebSockets with topics.

Best regards Paul

[paulreicherdt-annalect]

Nevermind.. found the problem