Error Code: 2013. Lost connection to MySQL server during query

Question

I got the Error Code: 2013. Lost connection to MySQL server during query error when I tried to add an index to a table using MySQL Workbench. I noticed als

Answer 1

This usually means that you have "incompatibilities with the current version of MySQL Server", see mysql_upgrade. I ran into this same issue and simply had to run:

mysql_upgrade --password The documentation states that, "mysql_upgrade should be executed each time you upgrade MySQL".