PDA

View Full Version : MyDNS crashes one more than one machine, something to worry about?

StrikerNL
30th June 2009, 10:15
Over the past week we've seen this happening twice on different machines (virtual machines, KVM-qemu, by the way):

Jun 28 13:30:28 ispconfig kernel: [2261270.357488] mydns[24252]: segfault at 0 ip 0804bb38 sp bf8e2e30 error 4 in mydns[8048000+33000]
Jun 28 13:30:30 ispconfig kernel: [2261272.364809] mydns[24264]: segfault at 0 ip 0804bb38 sp bf8e2e30 error 4 in mydns[8048000+33000]
Jun 28 13:30:31 ispconfig kernel: [2261273.547787] mydns[24319]: segfault at 0 ip 0804bb38 sp bf8e2e30 error 4 in mydns[8048000+33000]

And about 40 more lines of that, at which point MyDNS completely stops working.

messages.0:Jun 25 14:46:20 ispconfig kernel: [66694.721223] mydns[8031]: segfault at 0 ip 0804bb38 sp bf9bc760 error 4 in mydns[8048000+33000]
messages.0:Jun 25 14:46:20 ispconfig kernel: [66694.845825] mydns[8035]: segfault at 0 ip 0804bb38 sp bf9bc760 error 4 in mydns[8048000+33000]
messages.0:Jun 25 14:46:20 ispconfig kernel: [66695.049560] mydns[8042]: segfault at 0 ip 0804bb38 sp bf9bc760 error 4 in mydns[8048000+33000]
messages.0:Jun 25 14:46:20 ispconfig kernel: [66695.296392] mydns[8055]: segfault at 0 ip 0804bb38 sp bf9bc760 error 4 in mydns[8048000+33000]
messages.0:Jun 25 14:46:21 ispconfig kernel: [66695.600034] mydns[8063]: segfault at 0 ip 0804bb38 sp bf9bc760 error 4 in mydns[8048000+33000]

And about 40 more lines. Same as above.

Is this just a fluke, or something to worry about? By the way the hardware in this server has worked fine for nearly two years, I'm fairly sure this shouldn't be the issue. Also it happened on two different physical servers.
till
30th June 2009, 10:38
We run mydns on a few of our servers without probems. Which mydns version do you use?
StrikerNL
30th June 2009, 10:46
root@ispconfig:~# mydns --version
mydns (mydns) 1.2.8.15 (MySQL 5.0.67)

On both servers. MyDNS has run fine for a couple of months, these crashes are new. Basically wondering if it's anything to worry about.
till
30th June 2009, 10:48
Did you find anything related to this in the syslog? Maybe you should try to update to the latest mydns-ng version.
StrikerNL
30th June 2009, 10:51
What I found in the syslogs can be seen in the first post (segfaults).

MyDNS was compiled from source as per the instructions in the old Ubuntu 8.10/ISPConfig 3 installation guide. It's not an actual package. Can I upgrade from source easily, or replace it by package?
till
30th June 2009, 10:53
As far as I know there is no package. I think it should be enough to just download the enw sources and then run configure, make and make install. You might have to make a backup of the mydns.conf before the update as I'am not sure if the make install will overwrite it.
StrikerNL
30th June 2009, 10:58
### mydns version 1.2.8.27 installed!

I'll let you know if there are any more issues. Thanks!