Bug 82340 - NTP does not query the time server frequently enough to prevent drift
NTP does not query the time server frequently enough to prevent drift
Status: CLOSED NOTABUG
Product: Red Hat Linux
Classification: Retired
Component: ntp (Show other bugs)
8.0
i686 Linux
medium Severity medium
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Assigned To: Harald Hoyer
Brian Brock
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2003-01-21 09:33 EST by Michael Lee Yohe
Modified: 2007-04-18 12:50 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2003-01-21 11:59:13 EST
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Description Michael Lee Yohe 2003-01-21 09:33:44 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 Galeon/1.2.7 (X11; Linux i686; U;) Gecko/20030102

Description of problem:
My system generally gains two minutes in a week period.  This system has been
running non-stop for two weeks now, and was four minutes fast.  I have
configured NTP (using redhat-config-date) so that it would query the time server
for updates to keep the clock syncronized.  I have noticed that it had not
queried at all during the two week period.  Upon running redhat-config-date
again, it manually checked the time server and then corrected the time drift.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. see description
    

Actual Results:  Clock drifts fast...

Expected Results:  Clock should stay in sync with nightly queries to the time
server.

Additional info:

$ rpm -q ntp
ntp-4.1.1a-9
Comment 1 Harald Hoyer 2003-01-21 11:15:17 EST
what does ntpdc say?

# /usr/sbin/ntpdc
ntpdc> peers
     remote           local      st poll reach  delay   offset    disp
=======================================================================
....
Comment 2 Michael Lee Yohe 2003-01-21 11:53:07 EST
$ /usr/sbin/ntpdc 
ntpdc> peers
     remote           local      st poll reach  delay   offset    disp
=======================================================================
=time.nist.gov   5.0.0.0         16  512    0 0.00000  0.000000 0.00000
Comment 3 Harald Hoyer 2003-01-21 11:59:13 EST
so it does not connect... your /etc/ntp.conf should look like:

restrict default ignore
restrict 192.43.244.18 mask 255.255.255.255 nomodify notrap noquery
restrict 127.0.0.1
driftfile /etc/ntp/drift
broadcastdelay 0.008
authenticate yes
keys /etc/ntp/keys
server 192.43.244.18
Comment 4 Michael Lee Yohe 2003-01-21 12:09:05 EST
Okay - then perhaps this bug needs to be Component == redhat-config-date.  When
I configured ntp at installation, I expected it to query the server once in a
while.  This default configuration apparently does not query the server due to
an initial configuration issue.

The period by which an update can be made should be configurable by
redhat-config-date.

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