DNSCACHE / High CPU LOAD & Socket error ?

[Danny Mayer]

At 09:16 AM 9/16/2004, Nicolas LIENARD wrote:
>Hello,
>I'm using BIND for DNS CACHE.
>
>Using debian package, version is: BIND 9.2.1
>
>Sometimes, CPU incread to 100% and we don't know why...
>
>When trying to stop named properly , it didn"t... only a kill worked.
>
>Because we have lot of queries (~ 500 queries /s) , we tuned the named 
>conf with this options:
>
>recursive-clients 10000;
>tcp-clients 5000;
>
>(otherwise, there are "maximum reached" messages).
>
>Other named options are standards:
>
>         coresize        default;
>         datasize        default;
>         files           default;
>         stacksize       default;
>
>         recursion       yes;
>         fetch-glue      yes;
>         fake-iquery     no;
>         notify          no;
>         auth-nxdomain   yes;
>         multiple-cnames yes;
>         allow-transfer  { none; };
>
>         cleaning-interval       30;
>         heartbeat-interval      0;
>         interface-interval      0;
>
>         lame-ttl        600;
>         max-ncache-ttl  1080;
>
>
>Here the log during the high CPU Load:
>
>Sep 16 14:44:23 nscache0 named[24351]: socket.c:1100: unexpected error:
>Sep 16 14:44:23 nscache0 named[24351]: internal_send: 62.23.125.234#0: 
>Invalid argument
>Sep 16 14:44:23 nscache0 named[24351]: client 62.23.125.234#0: error 
>sending response: invalid file
>
>Sep 16 14:44:23 nscache0 named[24351]: socket.c:1100: unexpected error:
>Sep 16 14:44:23 nscache0 named[24351]: internal_send: 62.23.125.234#0: 
>Invalid argument
>Sep 16 14:44:23 nscache0 named[24351]: client 62.23.125.234#0: error 
>sending response: invalid file
>[...]
>
>This message appears 2000 times in log... what does this message mean ?
>
>I saw the same error on Google: 
>http://www.cctec.com/maillists/nanog/historical/0402/msg00523.html
>but don"t give any solution.

Upgrade to 9.2.3 at least. That's a pretty old version. 9.2.4 is still a 
release
candidate if you don't want to go with pre-release versions. There's a
pretty good chance that the problem has already been fixed.

Danny

>The CPU of the box is a PIII 1Ghz with 2Go RAM.
>
>Thanks in advance.
>
>Regards,
>
>Nicolas