2013 - Lost connection to MySQL server during query

SELECT max(quantity) as qty FROM personal_offers_by_customers_status_1 WHERE products_id='1483044678' AND quantity<='1'

[XT SQL Error]

2006 - MySQL server has gone away

select count(*) as total from sessions where sesskey = '5be84v7n5tubpr95n9c4i418a2'

[XT SQL Error]