Re: [tor-relays] [WARN] Your system clock just jumped 100 seconds forward; assuming established circuits no longer work.

[Zenaan Harkness <zen@xxxxxxxxxxxx>]

On 2/18/14, D.S. Ljungmark <spider@xxxxxxxxxxx> wrote:
> On Tue, Feb 18, 2014 at 12:02 PM, Zenaan Harkness <zen@xxxxxxxxxxxx> wrote:
>> My tor logs (running on Debian) are showing this warning:
>> [WARN] Your system clock just jumped 100 seconds forward; assuming
>> established circuits no longer work.
>>
>> I tried running openntpd as well as ntp packages (debian), and both
>> display the same problem - once or twice a day I get this jump in time
>> of in the order of a couple of minutes.

> Are you on a virtual machine?  Do you control the VM host? If not, it could
> be that your host is migrating your VM, or not scheduling it properly,
> which causes time drifts inside the VM.

No VM, an older 32-bit box, 1GiB RAM, no swap.

On 2/19/14, Andreas Krey <a.krey@xxxxxx> wrote:
> It may just be that your machine completely hangs for a while
> occasionally; that will look to tor like a clock jump in that
> direction. Either hard disk timeouts of some kind, or serious
> swapping. If VM then also possibly the entire VM being starved
> occasionally.

Default Debian ntp servers/ config:
server 0.debian.pool.ntp.org iburst
server 1.debian.pool.ntp.org iburst
server 2.debian.pool.ntp.org iburst
server 3.debian.pool.ntp.org iburst
etc
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