[ntp:questions] Date Jumped

Richard B. Gilbert rgilbert88 at comcast.net
Mon Jan 25 15:00:12 UTC 2010


Ryan Malayter wrote:
> On Sun, Jan 24, 2010 at 9:23 PM, Danny Mayer <mayer at ntp.org> wrote:
>> That's not what I said. I said that this *cannot* happen on the local
>> server after the first time it steps the clock no matter what the remote
>> servers say, even if all of the remote servers agree on the time. The
>> step size is too large for it to be processed by ntpd.
> 
> "Cannot happen"? I wasn't aware than ntpd's source code had been proven correct.
> 
> In my IT career, I've observed that when an end user or tester reports
> an issue, and a programmer says "that cannot happen"... the
> user/tester is correct 99% of the time.
> 

If I see a notation in code saying, in effect, "can't get here" I add 
whatever call means "suicide with crash dump" if it's not already 
present.  I don't get many crash dumps but if the impossible happens I 
like to have it documented.




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