[G] Environment - Fatal Error

GE.Mysql Error - Query execution fail. Message: MySQL server has gone away
Query: "SELECT
ID,
UID,
URL_String_LNG1 as URL_String,
URL_String_LNG1 as URL_String_Def,
Alt_URL_Active,
Alt_URL_LNG1 AS Alt_URL,
Alt_URL_Doc_ID,
Parent_ID
FROM
GDE_CMS_Documents
WHERE UID = 'SITE_MAP'".