High throughput send to EventHubs resulting into MessagingException / TimeoutException / Server was unable to process the request errors

Question

We are experiencing lots of these exceptions sending events to EventHubs during peak traffic:

\"Failed to send event to EventHub. Exception : Microsoft.ServiceBus.Me

Answer 1

After a lot of digging we decided to stop setting the PK for posted messages, and the issue simply went away!. We were using GUID as PK. We start to get very few erros on the Azure Portal, and no more exceptions. Hope this helps someone else