[CentOS] C6: ntpd time reset +277092510.162464 s

Rainer Traut tr.ml at gmx.de
Mon Sep 3 03:41:25 EDT 2012


Am 31.08.2012 16:58, schrieb Tom Grace:
> On 31/08/12 15:34, Rainer Traut wrote:
>> Am 31.08.2012 16:19, schrieb Tom Grace:
>>> If the clock is wrong by (if I remember correctly) about 30 mins it will
>>> take so long to drift back to being correct that NTPd gives up.
>>
>> Hmm, no it still does time resets in my tests iIf I set the clock -27s
>> of timesource.
>> This happens:
>> Aug 31 16:30:14 aitcsdb002 ntpd[6062]: time reset +27.006389 s
>
> Ah, it turns out I was wrong about the 30 mins thing, that relates to
> some other issue with NTP giving up and quitting if the clock is
> drifting around too much.

Thanks Tom and Dave for your answers.

I double checked with real hardware - there it works - so this looks to 
me like a bug in ESXi5 running RHEL6/C6 and ntpd.

We are running latest VMware ESXi5 patch 768111 and latest RHEL/CentOS. 
I followed VMware's best practices closely:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006427

Means, no time sync using vmware-tools, just ntpd with no local timesource.

Rainer


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