Lost connection to MySQL server during query<br>select id,classid,ttid,onclick,plnum,totaldown,newspath,filename,userid,username,firsttitle,isgood,ispic,istop,isqf,ismember,isurl,truetime,lastdotime,havehtml,groupid,userfen,titlefont,titleurl,stb,fstb,restb,keyboard,title,newstime,jiance,biaozhunleixing,chubanshe,isbn,chubanshijian,tushumulu,ppass,enname,book360,biaozhunmingcheng,chubanshijian2,biaozhunzhuangtai,titlepic,softwriter,softfj,language,softtype,softsq,star,filetype,filesize,downpath,softsay from ***_ecms_downloadlw where classid in (291,298,300,301,303,305,306,308,309,310,311,312) order by lastdotime DESC limit 1230,10