How do I kill connections to Azure SQL database if I can't access it?
To see existing connections on Azure SQL DB I use this query:
SELECT c.session_id, c.net_transport, c.encrypt_option, s.status, c.auth_scheme, s.host_name, s.program_name, s.client_interface_name, s.login_name, s.nt_domain, s.nt_user_name, s.original_login_name, c.connect_time, s.login_time FROM sys.dm_exec_connections AS c JOIN sys.dm_exec_sessions AS s ON c.session_id = s.session_id --WHERE c.session_id = @@SPID; --WHERE status = 'sleeping' ORDER BY c.connect_time ASC
To KILL all connections except mine (SPID) I use this query:
DECLARE @kill varchar(8000) = ''; SELECT @kill = @kill + 'KILL ' + CONVERT(varchar(5), c.session_id) + ';' FROM sys.dm_exec_connections AS c JOIN sys.dm_exec_sessions AS s ON c.session_id = s.session_id WHERE c.session_id <> @@SPID --WHERE status = 'sleeping' ORDER BY c.connect_time ASC EXEC(@kill)
This issue was caused by Azure automated backups failing to end sessions correctly. None of the other answers worked as they all require you to be able to connect to the database, and I was unable to do this. I ended up speaking on the phone to Microsoft Support for some hours, during which they were also unable to connect to the database for the same reason.
The resolution, from their end, was to migrate the database to a new node, which is not something that Azure users can do, so if you encounter this level of issue, really the best (and only) thing to do is to contact Microsoft support ASAP.
I do recommend trying out some of the other suggestions here first, but without the ability to make any connections you will be stuck.
Because this occurred during the process of upgrading a database on Azure, we implemented a procedure of disabling automated backups before upgrading databases as a precaution, and the problem has not reoccurred for us.
If those connections are still hung and not timed out, you can use t-sql KILL command to kill them.
Another option is to use DAC . See details here on MSDN.
If none of these options help, please email me details of your server and DB on shantanu dot kurhekar at microsoft dot com and I can help.