Date: Mon, 6 Aug 2007 11:11:03 GMT From: "vladislav V. Prodan" <universite@ukr.net> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/115242: Incorrect work ntpd Message-ID: <200708061111.l76BB3Bl076443@www.freebsd.org> Resent-Message-ID: <200708061120.l76BK1mI032931@freefall.freebsd.org>
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>Number: 115242
>Category: misc
>Synopsis: Incorrect work ntpd
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Aug 06 11:20:01 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator: vladislav V. Prodan
>Release: 7.0-CURRENT
>Organization:
>Environment:
FreeBSD otrada.od.ua 7.0-CURRENT FreeBSD 7.0-CURRENT #1: Sat Aug 4 16:03:28 EEST 2007 vlad11@otrada.local:/usr/obj/usr/src/sys/otrada.2 i386
>Description:
After several hours ntpd, it is deteriorating. At 6.2-Stable ntpd kept clear several weeks stratum 2, and seven hours of receiving stratum 3. We have put in cron restart ntpd every three hours.
# cat /etc/rc.conf | grep ntpd
ntpd_enable="YES"
ntpd_program="/usr/sbin/ntpd" # path to ntpd, if you want a different one.
ntpd_config="/etc/ntp.conf" # ntpd(8) configuration file
ntpd_sync_on_start="YES" # Sync time on ntpd startup, even if offset is h
ntpd_flags="-p /var/run/ntpd.pid"
# cat /etc/ntp.conf
#-----<< stratum 1 >>------#
server montpelier.ilan.caltech.edu
server clock.via.net
#server ntp1.cs.mu.OZ.AU
server vega.cbk.poznan.pl
##server time.nist.gov
server time-A.timefreq.bldrdoc.gov
###server ntp3.imvp.ru
server ntp.nasa.gov
#-----<< stratum 2 >>------#
server 193.140.151.9
server 129.132.2.21
server 216.27.190.202
server ntp.colocall.net
server burka.carrier.kiev.ua
#server ntp.cis.rv.ua
server mail.nla.od.ua
server www.nla.od.ua
server apophis.onua.edu.ua
driftfile /var/run/ntp.drift
statistics peerstats
statistics loopstats
statistics clockstats
logfile /var/log/ntp.log
keys /etc/ntp.key
trustedkey 1
requestkey 1
controlkey 1
####### end ntp.conf ######
# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
+ns01.deu.edu.tr 131.188.3.221 2 - 129 512 177 148.003 38.147 5.372
*swisstime.ee.et 129.132.2.22 2 - 62 512 377 65.933 23.781 2.385
io.berkeley.net .INIT. 16 - 382 1024 0 0.000 0.000 4000.00
+212.111.205.73 132.163.4.102 2 - 71 512 377 31.124 11.602 1.407
+212.111.205.74 209.81.9.7 2 - 130 512 377 32.749 5.303 4.975
After restart ntpd:
# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
-montpelier.ilan .USNO. 1 u 53 128 377 235.554 1.071 0.939
+clock.via.net .GPS. 1 u 95 128 377 213.797 1.419 1.118
+vega.cbk.poznan .PPS. 1 u 43 128 377 70.693 2.595 0.336
*time-B.timefreq .ACTS. 1 u 43 128 377 181.738 4.051 1.051
+ntp-nasa.arc.na .GPS. 1 u 55 128 377 225.393 5.468 0.957
-ns01.deu.edu.tr 131.188.3.221 2 u 41 128 375 139.256 7.891 18.671
-swisstime.ee.et 129.132.2.22 2 u 93 128 377 64.917 6.019 3.261
io.berkeley.net .INIT. 16 u 880 1024 0 0.000 0.000 4000.00
-zeus.colocall.n 132.163.4.103 2 u 103 128 377 13.226 -14.406 0.972
xburka.carrier.k 195.2.64.5 2 u 107 128 377 13.232 -82.647 3.691
-212.111.205.73 192.12.19.20 2 u 95 128 377 28.439 -12.242 0.887
-212.111.205.74 212.111.205.73 3 u 103 128 377 28.958 -17.884 1.462
#ntptrace
localhost: stratum 2, offset 0.002816, root distance 0.181288
time-B.timefreq.bldrdoc.gov: stratum 1, offset 0.000000, root distance 0.001300, refid 'ACTS'
In addition, ntpd why a two processes. Maybe the inappropriateness of one group led rapid degradation?
#ps -auxw | grep ntpd
root 35092 0,0 0,2 4624 1944 ?? Ss 12:59 0:00,14 /usr/sbin/ntpd -g -c /etc/ntp.conf -p /var/run/ntpd.pid
root 35093 0,0 0,2 4624 1952 ?? S 12:59 0:00,00 /usr/sbin/ntpd -g -c /etc/ntp.conf -p /var/run/ntpd.pid
>How-To-Repeat:
Run ntpd a couple of hours and get a result.
>Fix:
#cat /etc/crontab | grep ntpd
* */4 * * * root /etc/rc.d/ntpd restart > /dev/null 2>&1
>Release-Note:
>Audit-Trail:
>Unformatted:
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