[ale] Time jumping forward on RHEL6.3

[Jim Kinney]

Very strange. None of the rhel 6.3's I have are showing this at all. 
Then again, they are all VMs so things are quite different.

I have not seen it on any of the Centos 6.3 physical systems either. 
Keep us posted.

Take a B meson counter and turn it on. You may be having an issue with 
time reversal asymmetries :-)

http://blogs.nature.com/news/2012/11/particle-physicists-confirm-arrow-of-time-for-b-mesons.html


On 11/20/2012 11:26 AM, Lightner, Jeff wrote:
>
> Last week I noticed the time on two new servers we installed with 
> RHEL6.3 had jumped forward even though we had ntpd running and use 
> local time sources here.  I reconfigured ntp then with RedHat's GUI 
> for same then verified the hwclock was updated (and not using UTC) 
> then for good measure rebooted both to make sure the system time was 
> still correct.
>
> Yesterday morning I had set myself a reminder to re-verify and time 
> was still OK on both servers. I again rebooted to verify the system 
> time was set properly on boot.
>
> We were installing new software and it suggested adding the "-x" 
> option to ntpd which we did and restarted ntpd.   I again verified 
> time was still ok after that.
>
> Last night I noticed that at some point the time had again leapt 
> forward as it had last week.   This was by about 9 hours and 14 
> minutes.   It appears ntpd aborted (presumably due to the --x option 
> that prevents skewing) due to large gap in time (720000).
>
> This morning both servers are ahead by about 20 hours on system time 
> even though ntpd has not been running since yesterday's abort.
>
> I've looked through all cron and anacron files and can't find anything 
> that would be setting time automatically.
>
> A ticket has been opened with RedHat support but I'm wondering if 
> anyone has seen something like this and has any ideas what might be 
> causing it or how to prevent it.  We'll be running cluster software on 
> these two nodes so having time synchronizes is especially important.
>
> We do run many other RHEL (4, 5 & 6) servers as well as HP-UX and 
> Windows servers and workstations all using our internal time devices 
> as the NTP time source so I'm mystified as to why these two servers 
> have the issue.
>
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-- 
James P. Kinney III

Every time you stop a school, you will have to build a jail. What you gain at one end you lose at the other. It's like feeding a dog on his own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain

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