-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Will,
On 04/06/2011 03:01 AM, Will Roberts wrote: > Hi, > > I'm using unbound 1.4.6 on 40ish machines, and for the most part it > works fantastically. On one my machines however it seems to randomly > stop responding. I'm not convinced the fault here lies with unbound, but > as far as I can tell it's the only thing that seems to fail (which > triggers everything else since they can no longer resolve anything). That sounds bad. > When this issue happens, I can't communicate with unbound via > unbound-control and it will never resolve anything. I can cleanly shut > it down and start a new instance and it will behave exactly the same. > The only solution I've found is to restart the VPS. I have another VPS > from the same provider which is setup almost identically and it has > never had this issue. So, it is somehow unique to that machine. Can you see in 'top' what unbound is doing? (is it using cpu, 100% in a busy loop?, it is not responding to unbound-control, so it must be completely hosed somehow) netstat -su may be interesting (packet counters for UDP). Another thing you can do is use 'gcore' to make a coredump of the 'failed' unbound process. (and then kill it and start a new unbound for your production). Then you can use 'gdb' and your compiled unbound executable to read the core image and produce a stack backtrace what it is doing. > I've got debug logging on and the log file has dozens of requests per > minute up until the issue occurred, then nothing until it received > SIGTERM and shut down. The next time this happens (could be > hours/days/weeks) is there anything else I can check that would explain > why it does not appear to be even receiving the lookup requests? Well it should respond to the unbound-control utility. If it does not this means it is somehow no longer processing the main loop, or that network traffic does not reach it. Best regards, Wouter -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org/ iEYEARECAAYFAk2cAtQACgkQkDLqNwOhpPjEHgCfbQptajftrYpsIgTCeM866qFz EBEAnjRp+iUukwJxvfjC+eP8tltViCvh =NvQB -----END PGP SIGNATURE----- _______________________________________________ Unbound-users mailing list [email protected] http://unbound.nlnetlabs.nl/mailman/listinfo/unbound-users
