2013 - Lost connection to MySQL server during query

select count(*) as total from products_options popt, products_attributes patrib where patrib.products_id='47' and patrib.options_id = popt.products_options_id and popt.language_id = '2'

[XT SQL Error]

2006 - MySQL server has gone away

select count(*) as total from sessions where sesskey = 'dkg043816lc5ojjvqrsph3utr7'

[XT SQL Error]