2006 - MySQL server has gone away

select p.products_id, pd.products_name, p.products_price, p.products_tax_class_id, p.products_image, p2c.categories_id, cd.categories_name from products p, products_description pd, products_to_categories p2c, categories_description cd where p.products_status = '1' and p.products_id = '53630' and pd.products_id = '53630' and p2c.products_id = '53630' and pd.language_id = '1' and cd.categories_id = p2c.categories_id and cd.language_id = '1'

[XT SQL Error]

2006 - MySQL server has gone away

select count(*) as total from sessions where sesskey = '135bdd11cdeb1599ab6562ce921c84ec'

[XT SQL Error]