Fatal error: SQL ERROR [ mysql4 ]

MySQL server has gone away [2006]

SQL

SELECT config_name, config_value FROM config WHERE is_dynamic = 1

BACKTRACE

FILE: includes/db/mysql.php
LINE: 176
CALL: dbal->sql_error()

FILE: includes/cache.php
LINE: 37
CALL: dbal_mysql->sql_query()

FILE: style.php
LINE: 81
CALL: cache->obtain_config()

in /home/web/accs/vbstreets/webroots/forum/includes/db/dbal.php on line 697