Dag-Erling Smørgrav пишет: > Did something change in our resolver / getaddrinfo() recently? Check > this out: > > des_at_soe ~% cat /etc/ntp.conf > server europe.pool.ntp.org iburst > server europe.pool.ntp.org iburst > server europe.pool.ntp.org iburst > server europe.pool.ntp.org iburst > server europe.pool.ntp.org iburst > server europe.pool.ntp.org iburst > des_at_soe ~% ntpq -pn > remote refid st t when poll reach delay offset jitter > ============================================================================== > 81.169.180.26 .INIT. 16 u - 512 0 0.000 0.000 4000..00 > 81.169.180.26 .INIT. 16 u - 512 0 0.000 0.000 4000..00 > 81.169.180.26 .INIT. 16 u - 512 0 0.000 0.000 4000..00 > 81.169.180.26 .INIT. 16 u - 512 0 0.000 0.000 4000..00 > 81.169.180.26 .INIT. 16 u - 512 0 0.000 0.000 4000..00 > *81.169.180.26 192.53.103.104 2 u 2 64 77 63.218 -19.045 3.331 > > europe.pool.ntp.org returns a different address every time you query it, > and this used to work correctly. I don't know when it changed; it > worked fine before I last rebooted my NTP server five days ago, but its > userland is from December 16. > > It is *not* a name server issue: > > des_at_soe ~% host europe.pool.ntp.org > europe.pool.ntp.org has address 81.169.180.26 > europe.pool.ntp.org has address 77.66.32.156 > europe.pool.ntp.org has address 217.8.241.75 > europe.pool.ntp.org has address 130.226.232.145 > europe.pool.ntp.org has address 87.32.0.19 > des_at_soe ~% host europe.pool.ntp.org > europe.pool.ntp.org has address 87.32.0.19 > europe.pool.ntp.org has address 81.169.180.26 > europe.pool.ntp.org has address 77.66.32.156 > europe.pool.ntp.org has address 217.8.241.75 > europe.pool.ntp.org has address 130.226.232.145 > > Somehow, ntpd (or libc) is caching the result of the lookup where it > previously didn't. > > But this doesn't make sense, since neither ntpd nor libc nor > /etc/{nsswitch,ntp,resolv}.conf have changed since it last worked. > > For now, I'm going to work around it by explicitly using > [1-3].europe.pool.ntp.org, but I'd really like to know what's going > on... > > DES Well, tried that and found that if you rapidly issue a host command the results still the same (for 1 or 2 secs). > host 3.europe.pool.ntp.org 3.europe.pool.ntp.org has address 212.13.207.101 3.europe.pool.ntp.org has address 87.229.78.162 3.europe.pool.ntp.org has address 193.228.143.13 3.europe.pool.ntp.org has address 192.108.114.23 3.europe.pool.ntp.org has address 194.238.48.3 > host 3.europe.pool.ntp.org 3.europe.pool.ntp.org has address 212.13.207.101 3.europe.pool.ntp.org has address 87.229.78.162 3.europe.pool.ntp.org has address 193.228.143.13 3.europe.pool.ntp.org has address 192.108.114.23 3.europe.pool.ntp.org has address 194.238.48.3 > host 3.europe.pool.ntp.org 3.europe.pool.ntp.org has address 87.229.78.162 3.europe.pool.ntp.org has address 193.228.143.13 3.europe.pool.ntp.org has address 192.108.114.23 3.europe.pool.ntp.org has address 194.238.48.3 3.europe.pool.ntp.org has address 212.13.207.101 Try using this config: server 0.europe.pool.ntp.org iburst server 1.europe.pool.ntp.org iburst server 2.europe.pool.ntp.org iburst server 3.europe.pool.ntp.org iburst -- Sphinx of black quartz judge my vow.Received on Mon Jan 28 2008 - 08:10:07 UTC
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