We can restart the application role, email role and DB role from the UI, but since the past few days, we can see that the DB role restart doesn't work. Application and Email role restart works properly.
+1 we too are facing this issue.
+1 I faced the same issue.
I found both DB & Email failed to restart yesterday.
Do you get an error message?
Adam, No there is no error message.
How do you know that it hasn't worked?
The DB role restart would take a few seconds, and the website would show a error establishing a database connection for starters.
If the server isn't heavily loaded it should restart very quickly. After the restart, run:
mysql -e "show status LIKE 'Uptime';"
You should see a value close to zero.