While sending request from API to Service bus, error occured "No such host is known" (09b49113)

Hi Team,

We are using service bus to do some back-end process and it is running properly and processing the requests but all of sudden it threw error "No such host is known".

We are using below code to send message to Service Bus:

Message message = new Message(Encoding.UTF8.GetBytes(data));
QueueClient queueClient = new QueueClient(ServiceBusConnectionString, queueName);
await queueClient.SendAsync(message).ConfigureAwait(false);  

And getting error below at that time:

[ERR] Queue Message handler encountered an exception One or more errors occurred. (No such host is known) (09b49113)

Note: This is a intermittent issue.

Please let me know the root cause of this issue.