I was able to successfully upgrade to 2.15, but after running overnight MySQL quit running and will not restart. I am getting the following error when checking the status of MySQL in Linux. 'Can’t connect to local MySQL server through socket ‘/tmp/mysql.sock’ Check that mysqld is running and that the socket: ‘/tmp/mysql.sock’ exists!. I also see the following error in the browser SQLSTATE[HY000] [2002] Connection refused.
This is my second attempt to upgrade to this version with the same results.
Note: I am doing an incremental upgrade from version 1.12.
Which version of mysql? Did you by chance upgrade that software as well? Also, /tmp/mysql.sock is an unusual (and not terribly secure) place for the socket to exist. Is that how it is configured in /etc/my.cnf? Are you able to connect to mysql via the root user or mysql user on the server mysqld is (supposedly) running?