[Freeipa-users] ntpd frequency error xxx PPM exceeds tolerance 500 PPM

[Prasun Gera]

Has this got anything to do with ipa ? The messages started only recently,
which makes me think that it's not a hardware issue. There were only two
notable changes to this system recently. The hdd had to be replaced, and a
replica was set up. Could either have any part to play ?

On Thu, Sep 10, 2015 at 6:03 AM, Prasun Gera <prasun.gera at gmail.com> wrote:

> The hardware is not very old (ivybridge). The entries appear every few
> minutes in the log. The /etc/ntp.conf has not been modified manually. It
> lists 3 servers - 0.rhel.pool.ntp.org, 1 and 2. At the end, there are
> also a couple of additional local servers with the comment added by
> /sbin/dhclient-script. The replica on the same network with an identical
> ntp.conf file doesn't have these messages in the current log. However, if I
> go back to a week, I see similar messages there too.  The ping to public
> ntp servers varies from to a few ms to ~50 ms. The ping to local servers is
> under 1 ms. I followed steps from the first link (ntpd -qg), and the
> messages have stopped for now, but I suspect that they will reappear later.
> That's what happened last time I tried that solution. This is the output
> from ntpq -pn on the master:
>
>      remote           refid      st t when poll reach   delay   offset
>  jitter
>
> ==============================================================================
> +38.229.71.1     204.123.2.5      2 u   39   64  377   44.300  -1311.8
> 7.668
> +64.6.144.6      128.252.19.1     2 u   25   64  377   38.184  -1327.6
>  12.615
> -129.250.35.251  200.98.196.212   2 u   30   64  377   14.649  -1318.8
> 7.079
>  127.127.1.0     .LOCL.          10 l    -   64    0    0.000    0.000
> 0.000
> *localnetip1  localnetref1  2 u   55   64  377    0.349  -1316.0   8.264
> -localnetip2  localnetref2    3 u   64   64  377    0.459  -1309.6  10.516
>
>
> On Thu, Sep 10, 2015 at 5:27 AM, Andrew Holway <andrew.holway at gmail.com>
> wrote:
>
>> If could be the server is trying to access the time server over a heavily
>> congested network which could cause these types of problems.
>>
>>
>> How old is the hardware?
>> How often to these entries appear in the log?
>> What is the ping / traceroute to the time server you are using?
>> Are there any other machines on the same local network that are using
>> this timeserver? Do they have problems?
>>
>>
>>
>>
>> On 10 September 2015 at 14:18, Prasun Gera <prasun.gera at gmail.com> wrote:
>>
>>> So I did a bit of googling and tinker panic 0 only makes sense for
>>> virtual machines. Is there any way to confirm if it is indeed a hardware
>>> issue ?
>>>
>>> On Thu, Sep 10, 2015 at 5:16 AM, Andrew Holway <andrew.holway at gmail.com>
>>> wrote:
>>>
>>>> Thats odd. You would normally not need it on bare metal. It could be
>>>> broken hardware.
>>>>
>>>> On 10 September 2015 at 14:05, Prasun Gera <prasun.gera at gmail.com>
>>>> wrote:
>>>>
>>>>> Thanks. I'm not virtualizing though. Should I still add it ?
>>>>>
>>>>> On Thu, Sep 10, 2015 at 5:02 AM, Andrew Holway <
>>>>> andrew.holway at gmail.com> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I assume you are virtualising.
>>>>>>
>>>>>> Try adding "tinker panic 0" to /etc/ntp.conf.
>>>>>>
>>>>>> It should make it tolerant to heavily drifting virtual clocks.
>>>>>>
>>>>>> Cheers,
>>>>>>
>>>>>> Andrew
>>>>>>
>>>>>> On 10 September 2015 at 13:46, Prasun Gera <prasun.gera at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> OS: RHEL 7.1 w IDM
>>>>>>>
>>>>>>> I'm seeing these messages in my master's log messages. I don't know
>>>>>>> if it's related, but I think I started seeing them after I set up a
>>>>>>> replica. Everything seems to be working fine, but I'm worried that things
>>>>>>> will break if delta grows beyond a point. I tried steps in
>>>>>>> https://access.redhat.com/solutions/35640, but it didn't really
>>>>>>> help. The messages still appear regularly in the log.
>>>>>>>
>>>>>>> --
>>>>>>> Manage your subscription for the Freeipa-users mailing list:
>>>>>>> https://www.redhat.com/mailman/listinfo/freeipa-users
>>>>>>> Go to http://freeipa.org for more info on the project
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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