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HBase, mail # user - 0.94.2 failing regionservers


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Re: 0.94.2 failing regionservers
Ted Yu 2013-03-04, 17:23
In hindsight, this should have helped:

http://hbase.apache.org/book.html#upgrade0.94

I would suggest upgrading existing HFile v1 files to v2 format.

Cheers

On Mon, Mar 4, 2013 at 9:20 AM, Bryan Beaudreault
<[EMAIL PROTECTED]>wrote:

> Interesting.
>
> We upgraded by creating entirely new clusters with the CDH4.2 software
> installed onto it. Then we distributed copied the /hbase directory to the
> new clusters.  We haven't run a major compaction since then, so that could
> be the reason there are still v1 HFiles.  This migration took place just a
> couple days ago.
>
>
> On Mon, Mar 4, 2013 at 12:04 PM, Ted Yu <[EMAIL PROTECTED]> wrote:
>
> > In the stack trace, I see HFileReaderV1.java
> > I would expect your store files to be upgraded to HFile v2 after cluster
> > upgrade.
> >
> > Can you tell us more about how you upgraded your clusters ?
> >
> > Thanks
> >
> > On Mon, Mar 4, 2013 at 9:00 AM, Bryan Beaudreault
> > <[EMAIL PROTECTED]>wrote:
> >
> > > We recently upgraded multiple clusters to CDH 4.2, which comes with
> hbase
> > > 0.94.2  Since then We've seen region servers die periodically in a way
> I
> > > never saw before on CDH3.
> > >
> > > Here are the exceptions:
> > >
> > > First I see a slew of these: http://pastebin.com/WqSwMzuZ
> > >
> > > Then the regionserver starts closing all its regions, after throwing
> this
> > > exception: http://pastebin.com/396wX3iw
> > >
> > > This has now happened on multiple servers across multiple clusters, all
> > cdh
> > > 4.2.
> > >
> > > Any thoughts?  During the time our NameNodes seem to be doing fine and
> I
> > > don't see any issue on our datanodes either.
> > >
> >
>