2013 Lost connection to MySQL server during query
in:
[SELECT project_version_major, project_version_minor FROM zen_project_version WHERE project_version_key = 'Zen-Cart Database']

2006 MySQL server has gone away
in:
[select count(*) as total from zen_sessions where sesskey = 'a98ff4ba1faa571ac8d8d7343acca8f9']