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From Ted Yu <yuzhih...@gmail.com>
Subject Re: initial experience with HBase 0.90.1 rc0
Date Thu, 10 Feb 2011 23:12:34 GMT
.META. went offline during second flow attempt.

The time out I mentioned happened for 1st and 3rd attempts. HBase was
restarted before the 1st and 3rd attempts.

Here is jstack:
http://pastebin.com/EHMSvsRt

On Thu, Feb 10, 2011 at 3:04 PM, Stack <stack@duboce.net> wrote:

> So, .META. is not online?  What happens if you use shell at this time.
>
> Your attachement did not come across Ted.  Mind postbin'ing it?
>
> St.Ack
>
> On Thu, Feb 10, 2011 at 2:41 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> > I replaced hbase jar with hbase-0.90.1.jar
> > I also upgraded client side jar to hbase-0.90.1.jar
> >
> > Our map tasks were running faster than before for about 50 minutes.
> However,
> > map tasks then timed out calling flushCommits(). This happened even after
> > fresh restart of hbase.
> >
> > I don't see any exception in region server logs.
> >
> > In master log, I found:
> >
> > 2011-02-10 18:24:15,286 DEBUG
> > org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Opened region
> > -ROOT-,,0.70236052 on sjc1-hadoop6.X.com,60020,1297362251595
> > 2011-02-10 18:24:15,349 INFO
> org.apache.hadoop.hbase.catalog.CatalogTracker:
> > Failed verification of .META.,,1 at address=null;
> > org.apache.hadoop.hbase.NotServingRegionException:
> > org.apache.hadoop.hbase.NotServingRegionException: Region is not online:
> > .META.,,1
> > 2011-02-10 18:24:15,350 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > master:60000-0x12e10d0e31e0000 Creating (or updating) unassigned node for
> > 1028785192 with OFFLINE state
> >
> > I am attaching region server (which didn't respond to stop-hbase.sh)
> jstack.
> >
> > FYI
> >
> > On Thu, Feb 10, 2011 at 10:10 AM, Stack <stack@duboce.net> wrote:
> >>
> >> Thats probably enough Ted.  The 0.90.1 hbase-default.xml has an extra
> >> config. to enable the experimental HBASE-3455 feature but you can copy
> >> that over if you want to try playing with it (it defaults off so you'd
> >> copy over the config. if you wanted to set it to true).
> >>
> >> St.Ack
> >
> >
>

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