named and ntpd start order in rc.d
glarkin at FreeBSD.org
Wed Dec 3 16:08:18 PST 2008
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Nerius Landys wrote:
>> FreeBSD 7.0. I am having a problem when ntpd starts at bootup. It
>> continues to have 2 processes running, the process which does the DNS lookup
>> fails to exit, and ntpd fails to adjust the clock even after days of
>> running. Immediately after bootup and several hours or days later this is
>> what I get:
>> # ps -U root | grep ntpd
>> 87837 ?? Ss 0:00.03 /usr/sbin/ntpd -c /etc/ntp.conf -p
>> 87838 ?? S 0:00.00 /usr/sbin/ntpd -c /etc/ntp.conf -p
>> If I do a "/etc/rc.d/ntpd restart" on a running system it fixes the problem,
>> and only one of the ntpd processes remains, and the clock gets adjusted.
>> I have named running as a caching name server on my system. The contents of
>> my /etc/resolv.conf:
>> domain nerius.com
>> nameserver 127.0.0.1
>> My /etc/rc.conf:
>> I believe that the problem with ntpd is that named is started AFTER ntpd.
>> Trying to reproduce problem. On a running system. I shut down named. Then
>> I restart ntpd, then I start named. I can reproduce the problem that
>> happens on bootup - ntpd has 2 processes and does not adjust the clock.
>> Restarting ntpd while named is running fixes the problem
>> I believe that the fix for this is to add a dependency to /etc/rc.d/ntpd
>> script, adding "named" to "REQUIRE" section in comments. In your opinion,
>> is this a robust fix? For example the line in my /etc/rc.d/ntpd script that
>> looks like so:
>> # REQUIRE: DAEMON ntpdate cleanvar devfs
>> would be changed to this:
>> # REQUIRE: DAEMON ntpdate cleanvar devfs named
> Modifying /etc/rc.d/ntpd in this manner did not fix the problem. I
> still have 2 ntpd processes running indefinitely after bootup of the
> system, until I manually issue a "/etc/rc.d/ntpd restart", after which
> the ntpd runs fine. As a separate test, I tried adjusting my
> resolv.conf to point to an external name server, and I disabled named
> at startup, and used the original /etc/rc.d/ntpd. I still got the
> same problem - 2 ntpd processes running indefinitely.
> Does anyone know why I'm getting 2 ntpd processes running after bootup
> (and ntpd fails to adjust the clock as a result)? Any suggested fix
> would be appreciated.
I don't know why those processes are hung after boot, but in order to
troubleshoot the problem, I suggest that you modify the /etc/rc.d/ntpd
script to invoke ntpd from truss and log the output to a file, e.g.
/tmp/truss.log.$$. Once you've rebooted, kill the processes and post
the the log files on a web site somewhere so we can have a look at them.
Also, what are the contents of your /etc/ntp.conf file?
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