This one sounds like a duplicate of #1293867. Your my.cnf has settings pointing to /usr/share/mysql and this upgrade renames that dir. In my case, the upgrade also silently modified my my.cnf for me, but Puppet restored the original setting and hence breakage.
This one sounds like a duplicate of #1293867. Your my.cnf has settings pointing to /usr/share/mysql and this upgrade renames that dir. In my case, the upgrade also silently modified my my.cnf for me, but Puppet restored the original setting and hence breakage.