System.Net.Sockets.SocketException

Guest User

7y2kCognitive Services

Hi Team

I am trying to readmessage2device, each time want to readmessage2device, i often get this websocket exception.

This method it does the following for running;

private static async Task Main(string[] args)
{
Console.WriteLine("IoT Hub App - Read device to cloud messages.");
var connectionString = new EventHubsConnectionStringBuilder(new Uri(s_eventHubsCompatibleEndpoint), s_eventHubsCompatiblePath, s_iotHubSasKeyName, s_iotHubSasKey);
s_eventHubClient = EventHubClient.CreateFromConnectionString(connectionString.ToString());
var runtimeInfo = await s_eventHubClient.GetRuntimeInformationAsync();
var d2Partitions = runtimeInfo.PartitionIds;
CancellationTokenSource cts = new CancellationTokenSource();
Console.CancelKeyPress += (s, e) =>
{
e.Cancel = true;
cts.Cancel();
Console.WriteLine("Exiting...");
};
var tasks = new List();
foreach(string partition in d2Partitions)
{
tasks.Add(ReceiveMessagesFromDeviceAsync(partition, cts.Token));
}
Task.WaitAll(tasks.ToArray());
}
}
}

What could be the reason for this? Firewall issue or network, cant seem to understand where its getting it from.

15 Replies

Know the answer? Post it — somebody with the same question will find it here.

Hemant Jindal7y ago
Accepted answer
please let me know what time suits to you. i am available now
Guest User7y ago
sure lets do it@08am CAT morning. is it fine on your side?
Guest User7y ago
Please check your mail, anydesk is set
Hemant Jindal7y ago
[email protected]

if possible can we use anydesk instead of teamviewer
Guest User7y ago
Hi Hemant

email me your mail, i send you my teaviewer details to debug.
Hemant Jindal7y ago
your settings seems Ok

kindly s_iotHubSasKeyName = "myservices"; with s_iotHubSasKeyName = "service"; and verify

if possible i can access your machine in the night (IST) and debug/troubleshoot
Guest User7y ago
az iot hub show --query properties.eventHubEndpoints.events.path --name {your IoT Hub name}

"universityiothub";

Inside my Main class, i am doing that by using this s_eventhubClient = EventHubClient.CreateFromConnectionString(connectionString.ToString()));

connectionString.ToString() return type object for my properties defined for reference and memory allocation CLR does this as a microsoft rule. Or am i missing something more important?
Hemant Jindal7y ago
az iot hub show --query properties.eventHubEndpoints.events.path --name {your IoT Hub name} and assign returned value to s_eventHubsCompatiblePath.
Guest User7y ago
Hemant

Please see what i am declaring from the variable members before they got passed on from the method in Main.;

// az iot hub show --query properties.eventHubEndpoints.events.endpoint --name {your IoT Hub name}
private readonly static string s_eventHubsCompatibleEndpoint = "sb://iothub-ns-university-2081416-42bc501981.servicebus.windows.net/";
// Event Hub-compatible name
// az iot hub show --query properties.eventHubEndpoints.events.path --name {your IoT Hub name}
private readonly static string s_eventHubsCompatiblePath = "universityiothub";
// az iot hub policy show --name service --query primaryKey --hub-name {your IoT Hub name}
private readonly static string s_iotHubSasKey = "*****=";
private readonly static string s_iotHubSasKeyName = "myservices";
private static EventHubClient s_eventHubClient;

But i am still facing the same problem, what could be the issue?
Hemant Jindal7y ago
Please verify s_eventHubsCompatiblePath is correct. make sure that this is filled from built in events. i assume that you have used iot hub name

run this command on cloud shell to get the endpoint path:

az iot hub show --query properties.eventHubEndpoints.events.path --name YourIoTHubName
Guest User7y ago
Hi Hemant
I have removed endpoint, im still facing the websocket exception error. Correct me on one thing, i have verify using Azure CLI as to see the connectionString, keyName, etc. Why am i still getting the issue? I am also using deviceExplore to test, im getting an exception as well not running.
Hemant Jindal7y ago
remove Endpoint= from compatibleEndpoint and try

i have tried to connect to my IOT hub and not faced any problem
Guest User7y ago
Hi Nehmant

I got now different error on UR scheme is not valid. I provided all my connection string as per below line 75 as being this line of code; what am missing now?

var connectionString = new EventHubsConnectionStringBuilder(new Uri(s_eventHubsCompatibleEndpoint), s_eventHubsCompatiblePath, s_iotHubSasKeyName, s_iotHubSasKey);
s_eventHubClient = EventHubClient.CreateFromConnectionString(connectionString.ToString());
Hemant Jindal7y ago
https://stackoverflow.com/questions/57472707/how-to-solve-unhandle-exceptionsystem-net-socket-socketexception-in-azure-iot-r
Hemant Jindal7y ago
two possible approaches:
verify shared access key
try to connect with direct connectionstring
you can also refer this link https://docs.microsoft.com/en-us/azure/iot-hub/quickstart-send-telemetry-dotnet you shall be able to download few sample as well