[ntp:questions] "No association ID's returned" after a period of time

Brian J. Murrell brian at interlinx.bc.ca
Thu Aug 27 19:20:52 UTC 2009


[ repost given my last one never showed up on the group.  apologies in
advance for duplicates. ]

Hello.

I have an NTP server here in my network which I use to sync from some
servers on the Internet and then I sync my local network's clocks to it.

For some time now, this local time reference server has been losing it's
peers as such:

# echo peers | ntpq
No association ID's returned

If I simply restart the server, it will again sync with it's peers and
things will be good for a while again, but eventually, the above will
re-occur.

My configuration is as follows:

driftfile /var/lib/ntp/ntp.drift
statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable
server ca.pool.ntp.org
server ca.pool.ntp.org
server pool.ntp.org
server ntp.ubuntu.com
restrict -4 default kod notrap nomodify nopeer noquery
restrict -6 default kod notrap nomodify nopeer noquery
restrict 127.0.0.1
restrict ::1

Any ideas as to why this might be happening, or hints on how to debug
it?

The version of the ntpd server on this troubled machine is:

ntpd 4.2.4p4 at 1.1520-o Wed May 13 21:05:57 UTC 2009 (1)

Startup messages from the restart I just initiated:

Aug 27 09:47:19 linux ntpd[13347]: ntpd 4.2.4p4 at 1.1520-o Wed May 13 21:05:57 UTC 2009 (1)
Aug 27 09:47:19 linux ntpd[13348]: precision = 1.000 usec
Aug 27 09:47:19 linux ntpd[13348]: Listening on interface #0 wildcard, 0.0.0.0#123 Disabled
Aug 27 09:47:19 linux ntpd[13348]: Listening on interface #1 wildcard, ::#123 Disabled
Aug 27 09:47:19 linux ntpd[13348]: Listening on interface #2 lo, ::1#123 Enabled
Aug 27 09:47:19 linux ntpd[13348]: Listening on interface #3 eth0, 1234:5678:919:0:7a3:a2ee:ef1a:8b74#123 Enabled
Aug 27 09:47:19 linux ntpd[13348]: Listening on interface #4 eth0, fe80::2d0:a2ee:ef1a:8b74#123 Enabled
Aug 27 09:47:19 linux ntpd[13348]: Listening on interface #5 lo, 127.0.0.1#123 Enabled
Aug 27 09:47:19 linux ntpd[13348]: Listening on interface #6 eth0, 10.75.22.3#123 Enabled
Aug 27 09:47:19 linux ntpd[13348]: Listening on interface #7 eth0:1, 10.75.22.8#123 Enabled
Aug 27 09:47:19 linux ntpd[13348]: kernel time sync status 0040
Aug 27 09:47:19 linux ntpd[13348]: frequency initialized -29.254 PPM from /var/lib/ntp/ntp.drift

Listing peers now shows:

# echo peers | ntpq
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 ip-174-142-75-1 129.128.5.210    2 u   11   64    7   23.005  45866.3   1.393
 zeus.yocum.org  65.212.71.102    2 u   11   64    7   21.446  45862.0   2.440
 p1-ha-inbound-g 136.159.2.9      3 u    7   64    7   76.035  45861.4   0.943
 europium.canoni 193.79.237.14    2 u    9   64    7  114.840  45860.0   1.409

Thanx in advance for any hints you can provide!

b.

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