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From Ted Yu <yuzhih...@gmail.com>
Subject Re: CatalogJanitor: REGIONINFO_QUALIFIER is empty
Date Mon, 25 Feb 2013 14:58:27 GMT
I think hbck should be enhanced to deal with this situation.

On Mon, Feb 25, 2013 at 6:56 AM, Jean-Marc Spaggiari <
jean-marc@spaggiari.org> wrote:

> Hi Dave,
>
> Thanks for the details.
>
> Is it something that we should think about adding into HBCK?
>
> Seems that it can detect them "Number of empty REGIONINFO_QUALIFIER rows in
> .META.: 6" but it's not fixing them nor listing them.
>
> JM
>
> 2013/2/25 ramkrishna vasudevan <ramkrishna.s.vasudevan@gmail.com>
>
> > Thanks for the info Dave.  Others will be benefited too.
> >
> > Regards
> > Ram
> >
> > On Mon, Feb 25, 2013 at 7:25 PM, Dave Latham <latham@davelink.net>
> wrote:
> >
> > > We recently saw some of these warnings in a cluster we were setting up.
> > > These warnings mean there are rows in the META table that are missing
> one
> > > of the expected columns.  In our case, we verified that these regions
> > > didn't appear to exist in HDFS either and the table itself showed no
> > holes
> > > or problems in hbck or via our application.  After looking at the
> > > timestamps of the other data in these rows in META we determined that
> the
> > > remaining columns in META had been written on an earlier incarnation
> of a
> > > table with the same name.  I.e. we created a table once, put data in
> it,
> > > deleted the table, created a new table of the same name, and apparently
> > not
> > > everything was correctly deleted from META.  I'm not sure how that
> > > happened, but to clean it up we manually removed those rows from META
> and
> > > didn't observe any more WARNings or problems afterward.  There's
> another
> > > mailing list thread from some months back from someone with a similar
> > issue
> > > and resolution.  Good luck!
> > >
> > > Dave
> > >
> > >
> > > On Sun, Feb 24, 2013 at 5:03 PM, Jean-Marc Spaggiari <
> > > jean-marc@spaggiari.org> wrote:
> > >
> > > > Hi,
> > > >
> > > > I'm wondering, how much should we worrie about those warnings:
> > > > WARN org.apache.hadoop.hbase.master.CatalogJanitor:
> > REGIONINFO_QUALIFIER
> > > is
> > > > empty in keyvalues={
> > > >
> > > > I have 6 of them show each time the CatalgoJanitor is running (5
> > > minutes).
> > > >
> > > > Doesn't seems to really be an issue, but then why is it a WARN?
> > > >
> > > > Thanks,
> > > >
> > > > JM
> > > >
> > >
> >
>

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