Re: [Pdns-users] tcp listener issue - hopefully fixed
On Mon, Aug 23, 2010 at 11:37:42AM +0100, Simon Bedford wrote: Just returned from annual leave to this welcome news, has anyone had a chance to try it as yet and investigate whether the bug still manifests? And does it no longer happen when running Brad's test script? Simon, Sadly we found that the previous code drop, while stable, still exhibited the same problem. We've fixed yet another bug that might be causing the issue, and we are currently testing that. This drop can be found on http://svn.powerdns.com/snapshots/pdns-recursor-3.3-pre.tar.bz2 If you compile the program below, and run it on your pdns server, you'll probably see it print '0' and then a very large number. If you could share that output with us, it could tell us if we are on the right track. http://pastie.org/1124088 http://pastie.org/1124088.txt To compile, save as .cpp file and compile with 'g++ -O2 testing.cpp -o testing', and run with './testing'. Good luck! Bert ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
Re: [Pdns-users] tcp listener issue - hopefully fixed
On Sun, Aug 29, 2010 at 04:56:14PM +0200, bert hubert wrote: We've fixed yet another bug that might be causing the issue, and we are currently testing that. This drop can be found on http://svn.powerdns.com/snapshots/pdns-recursor-3.3-pre.tar.bz2 Our testing shows that the problem disappeared! Many thanks to Christian Hofstaedtler. If this was the final problem, this also explains why only some people are seeing it. There are hardware platforms that are highly immune to this bug (Michel Stol measured this), but we've seen an Openvirtuozo hosted Linux being very vulnerable to it. On my own testing hardware, the problem was relatively rare. For the people who care, the root cause appeared to be doing non-atomic updates to the TCP client count. The release process for 3.3 can now start - only 1 feature request left to finish. Bert ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
Re: [Pdns-users] tcp listener issue - hopefully fixed
-Original Message- From: pdns-users-boun...@mailman.powerdns.com [mailto:pdns-users- boun...@mailman.powerdns.com] On Behalf Of bert hubert Sent: Sunday, August 29, 2010 11:31 AM To: Mike Cc: Brad Dameron; pdns-users@mailman.powerdns.com Subject: Re: [Pdns-users] tcp listener issue - hopefully fixed On Sun, Aug 29, 2010 at 04:56:14PM +0200, bert hubert wrote: We've fixed yet another bug that might be causing the issue, and we are currently testing that. This drop can be found on http://svn.powerdns.com/snapshots/pdns-recursor-3.3-pre.tar.bz2 Our testing shows that the problem disappeared! Many thanks to Christian Hofstaedtler. If this was the final problem, this also explains why only some people are seeing it. There are hardware platforms that are highly immune to this bug (Michel Stol measured this), but we've seen an Openvirtuozo hosted Linux being very vulnerable to it. On my own testing hardware, the problem was relatively rare. For the people who care, the root cause appeared to be doing non-atomic updates to the TCP client count. The release process for 3.3 can now start - only 1 feature request left to finish. Bert Good to hear Bert. I'll run it through the ringer on Monday and see if we can reproduce the problem. Cross fingers that it is fixed. Thanks, Brad This email may contain confidential and privileged material for the sole use of the intended recipient. Any review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please contact the sender by reply email and delete all copies of this message. ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
