Application Error

Fatal error: Uncaught exception 'Exception' with message 'mysql_query(): Got error 28 from storage engine
Original SQL query: SELECT main.* , language.prop_id as language_val   FROM `xt_documents_library` as main  LEFT JOIN xt_documents_library_props AS language 
                        ON (    WHERE 1   AND (`language`.prop_type='language' AND language.prop_id IN('5') )  AND'1'  GROUP BY  ORDER BY main.added_on  DESC   LIMIT 0, 8 
' in /var/www/status89/data/www/
Stack trace:
#0 /var/www/status89/data/www/ CommonClass::mydie()
#1 /var/www/status89/data/www/ CommonClass->mydie()
#2 /var/www/status89/data/www/ CommonClass->sql_exec()
#3 /var/www/status89/data/www/ in /var/www/status89/data/www/ on line 0