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From Johannes Schaback <johannes.schab...@visual-meta.com>
Subject Re: single RegionServer stuck, causing cluster to hang
Date Sun, 24 Aug 2014 04:14:51 GMT
Hi Qiang,

no, we dont use coprocessors.

Thanks, Johannes


On Sun, Aug 24, 2014 at 6:04 AM, Qiang Tian <tianq01@gmail.com> wrote:

> Hi  Johannes,
> Do you use endpoint / coprocessor stuff?
> thanks.
>
>
> On Sun, Aug 24, 2014 at 11:51 AM, Qiang Tian <tianq01@gmail.com> wrote:
>
> > Hi Stack,
> > I think you are right. the multiple queue change was introduced by
> > HBASE-11355(0.98.4). if there is only 1 queue, the stuck will not happen.
> > some handlers are gone but still some left to service the request(all
> > handlers gone looks a rare case)...
> > so the problem might have been there for some time, the change just
> > exposes it.
> >
> >
> >
> > On Sun, Aug 24, 2014 at 7:51 AM, Stack <stack@duboce.net> wrote:
> >
> >> On Sat, Aug 23, 2014 at 4:06 PM, Stack <stack@duboce.net> wrote:
> >>
> >> > ...
> >> > If you were looking for something to try, set
> >> hbase.ipc.server.callqueue.handler.factor
> >> > to 0.  Multiple queues is what is new here. It should not make a
> >> difference
> >> > but...
> >> >
> >> >
> >> Hmm. Ignore above I'd say.  I can't see how it would trigger this issue.
> >> Let me make a patch to give us more info and will have the handler keep
> >> going....
> >>
> >> St.Ack
> >>
> >
> >
>



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