Hi,
We suddenly started experiencing intermittent connectivity issues with a VM with SQL Server 2014 installed (from gallery, this is not SQL Azure). We have another VM on the same VNET and Affinity group and running web services which connect to the SQL server. The problems started to exhibit on the 9th of October with users being disconnected from their sessions with error "provider: TCP Provider, error: 0 - The specified network name is no longer available" and "semaphore timeout period has expired". The application has been stable for a number of weeks until now. The users connect and disconnect to a number of databases from their desktop app which uses webservices on an application server which in turn queries the SQL Server. Normally, these are network connectivity issues but I have checked and re-checked our network and the ping times are within acceptable range from the client 11ms and between the application server and SQL Server<1ms. Nothing has drastically changed on our network which brings me to think if anything has changed on the Azure network that we don't know about. We connect to the Azure VNET over a Site-to-Site VPN from our corporate office. I need to find a solution soon or will have to bring the application back on premise.
1) I have shutdown and restarted the VMs
2) Restarted our router
3) Installed the latest SQL Native client on both the application server and desktop client
4) Updated SQL Server 2014 to CU3
Any help is appreciated.
Thanks