Errormessage: 
			    
SELECT DISTINCT a.cat_id, b.name, b.url FROM 
(SELECT distinct b.cat_id , count(b.cat_id)  tot
FROM comclass a
JOIN comclass b on a.comp_id = b.comp_id
where a.cat_id = 10843
AND b.cat_id != 0
GROUP BY b.cat_id  HAVING tot > 2   ORDER BY tot desc LIMIT 50 ) a
JOIN comclass c ON c.cat_id = a.cat_id
JOIN categories b ON b.id = a.cat_id
WHERE c.city_id = 11294
LIMIT 10
			    
			    
MySQL server has gone away