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Re: hard crash on leap second

On Wed, Dec 31, 2008 at 08:20:41PM -0600, Ron Johnson wrote:
> On 12/31/08 20:05, Ken Irving wrote:
>> On Wed, Dec 31, 2008 at 07:48:41PM -0600, Ron Johnson wrote:
>>> On 12/31/08 19:19, Ken Irving wrote:
>>>> On Wed, Dec 31, 2008 at 04:02:03PM -0900, Ken Irving wrote:
>>>>> On Wed, Dec 31, 2008 at 07:25:25PM -0500, Travis Crump wrote:
>>>>>> I had a hard crash of my lenny system precisely when the leap second was
>>>>>> added.  While X has flaked in the past, I've never had a hard crash
>>>>>> before.  I have no other evidence they were related, but I wasn't doing
>>>>>> anything unusual at the time.  Any ideas?
>>>>> Could you clarify when this happened?  Your message has a 
>>>>> timestamp of 07:25:25PM -0500, but I thought the leap second was 
>>>>> to be applied at
>>>>> midnight.  Or maybe you're referring to a system in another timezone?
>>>> Duh... Of course this was done at midnight UTC.  I see in my logs:
>>>>   Dec 31 14:59:59 isto kernel: Clock: inserting leap second 23:59:60 UTC
>>> Do you run ntp?
>> Yes.
> That's why I didn't see it, then, since I run ntpdate every three hours.  
> But that's probably also what the -0.56 second step is at 18:03.
> $ sudo grep 'time server' /var/log/syslog
> Dec 31 09:03:02 haggis ntpdate[3653]: adjust time server  
> offset 0.438687 sec
> Dec 31 12:03:02 haggis ntpdate[7156]: adjust time server  
> offset 0.439682 sec
> Dec 31 15:03:01 haggis ntpdate[8467]: adjust time server  
> offset 0.439121 sec
> Dec 31 18:03:01 haggis ntpdate[9521]: step time server offset 
> -0.562385 sec

I see the same as that in a machine running ntpdate.  I used to mainly use
ntpdate, but saw lots of references (though I have no citations to offer)
recommending ntp over ntpdate, and find that it *just works" now when I set
up a machine.


Ken Irving

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