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HBase >> mail # user >> AsynchBase client holds stale dead region server for long time even after the META has already been update.


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Tianying Chang 2013-01-25, 18:54
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Ted Yu 2013-01-25, 18:58
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Tianying Chang 2013-01-25, 19:12
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Marcos Ortiz 2013-01-25, 21:29
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Tianying Chang 2013-01-25, 23:31
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Shrijeet Paliwal 2013-01-25, 19:01
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Tianying Chang 2013-01-26, 01:28
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tsuna 2013-01-26, 06:53
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Re: AsynchBase client holds stale dead region server for long time even after the META has already been update.
Hi Tsuna,
As Shrijeet mentioned, we (@Rocketfuel) were experiencing this bug
internally when doing cluster restarts. After some trial and error, I was
able to create a set of steps to reproduce this bug in a controlled fashion
on our test cluster. Further, using heap dumps and added debug messages,
this looks like the cause and fix:
https://github.com/OpenTSDB/asynchbase/pull/48. I have tested this
repeatedly on the test cluster and things are looking fine. Please have a
look and see if this makes sense and if the fix is a correct one.

Cheers,
Ishan

On Friday, 25 January 2013 22:53:17 UTC-8, tsuna wrote:
>
> On Fri, Jan 25, 2013 at 5:28 PM, Tianying Chang <[EMAIL PROTECTED]<javascript:>>
> wrote:
> > Thanks for the information! We have seen this couple times recently.
> Last week, it was very long(like 40+ minutes before we restart). I will
> follow up on that discuss thread. Thanks a lot!!
>
> This is bug number 1, I haven't been able to track it down as I've
> never been able to reproduce it in a controller fashion :(
> https://github.com/OpenTSDB/asynchbase/issues/1
>
> I also spent hours manually walking references of heap dumps
> and checking state to see if anything was wrong but I haven't
> found anything, not even a clue.
>
> --
> Benoit "tsuna" Sigoure
>
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Marcos Ortiz 2013-01-29, 14:07