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From "Jack Krupansky" <j...@basetechnology.com>
Subject Re: leap second bug
Date Sun, 01 Jul 2012 16:15:21 GMT
Interesting:

"
The sequence of dates of the UTC second markers will be:

2012 June 30, 23h 59m 59s
2012 June 30, 23h 59m 60s
2012 July 1, 0h 0m 0s
"

See:
http://wwp.greenwichmeantime.com/info/leap-second.htm

So, there were two consecutive second " markers" which were literally 
distinct, but numerically identical.

What "design pattern" for timing did Linux violate? In other words, what 
lesson should we be learning to assure that we don't have a similar problem 
at an application level on a future leap second?

-- Jack Krupansky

-----Original Message----- 
From: Óscar Marín Miró
Sent: Sunday, July 01, 2012 11:02 AM
To: solr-user@lucene.apache.org
Subject: Re: leap second bug

Thanks Michael, nice information :)

On Sun, Jul 1, 2012 at 5:29 PM, Michael McCandless <
lucene@mikemccandless.com> wrote:

> Looks like this is a low-level Linux issue ... see Shay's email to the
> ElasticSearch list about it:
>
>
> https://groups.google.com/forum/?fromgroups#!topic/elasticsearch/_I1_OfaL7QY
>
> Also see the comments here:
>
>      http://news.ycombinator.com/item?id=4182642
>
> Mike McCandless
>
> http://blog.mikemccandless.com
>
> On Sun, Jul 1, 2012 at 8:08 AM, Óscar Marín Miró
> <oscarmarinmiro@gmail.com> wrote:
> > Hello Michael, thanks for the note :)
> >
> > I'm having a similar problem since yesterday, tomcats are wild on CPU
> [near
> > 100%]. Did your solr servers did not reply to index/query requests?
> >
> > Thanks :)
> >
> > On Sun, Jul 1, 2012 at 1:22 PM, Michael Tsadikov <michael@myheritage.com
> >wrote:
> >
> >> Our solr servers went into GC hell, and became non-responsive on date
> >> change today.
> >>
> >> Restarting tomcats did not help.
> >>
> >> Rebooting the machine did.
> >>
> >>
> >>
> http://www.wired.com/wiredenterprise/2012/07/leap-second-bug-wreaks-havoc-with-java-linux/
> >>
> >
> >
> >
> > --
> > Whether it's science, technology, personal experience, true love,
> > astrology, or gut feelings, each of us has confidence in something that
> we
> > will never fully comprehend.
> >  --Roy H. William
>



-- 
Whether it's science, technology, personal experience, true love,
astrology, or gut feelings, each of us has confidence in something that we
will never fully comprehend.
--Roy H. William 


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