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From Jens Rantil <jens.ran...@tink.se>
Subject Re: Reelection takes a long time
Date Tue, 24 Nov 2015 10:46:25 GMT
Longer than 30 seconds (which is our general lock timeout in applications),
but shorter than 3 minutes. I'd guess 2 minutes.

I'll see if I can restart the master tonight to get some logs.

/J

Cheers,
Jens

On Mon, Nov 23, 2015 at 3:29 PM, Camille Fournier <camille@apache.org>
wrote:

> What does "a bit too long" mean here? 10 seconds? Two minutes? Longer,
> shorter?
>
> Any snippets from the log during election would also be helpful.
>
> Thanks
> C
> On Nov 23, 2015 7:49 AM, "Jens Rantil" <jens.rantil@tink.se> wrote:
>
> > Hi,
> >
> > *Problem:* We are running a Zookeeper ensemble that takes a bit too long
> > time before a new master is elected when the old one is brought down.
> >
> > *Question:* Which configuration settings do I need to change to decrease
> > the time before a reelection occurs? tickTime and syncLimit?
> >
> > *Additionals:* The relevant (I think!) configuration we are running is:
> >
> > # The number of milliseconds of each tick
> > tickTime=2000
> > # The number of ticks that the initial
> > # synchronization phase can take
> > initLimit=60
> > # The number of ticks that can pass between
> > # sending a request and getting an acknowledgement
> > syncLimit=30
> >
> > I have previously increases the limits somewhat to accomodate for
> zookeeper
> > nodes not being able to come up due to too large snapshot. This could
> > definitely be the reason why reelection takes longer time.
> >
> > Any input appreciated.
> >
> > Cheers,
> > Jens
> >
> > --
> > Jens Rantil
> > Backend engineer
> > Tink AB
> >
> > Email: jens.rantil@tink.se
> > Phone: +46 708 84 18 32
> > Web: www.tink.se
> >
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> > <
> >
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> > >
> >  Twitter <https://twitter.com/tink>
> >
>



-- 
Jens Rantil
Backend engineer
Tink AB

Email: jens.rantil@tink.se
Phone: +46 708 84 18 32
Web: www.tink.se

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