Hi Brian I'm using hbase trunk (updated yesterday) and Hadoop 0.17 branch.
David > -----Original Message----- > From: Bryan Duxbury [mailto:[EMAIL PROTECTED] > Sent: Friday, April 18, 2008 1:41 AM > To: hbase-user@hadoop.apache.org > Subject: Re: Regions Offline > > For starters, what version of HBase/Hadoop are you using? There was a > pretty bad bug in 0.16 that would cause regions to go offline and all > sorts of other unexpected behavior. > -Bryan > > On Apr 28, 2008, at 5:00 PM, David Alves wrote: > > > Hi > > > > My system is quite simple: > > - two (one quad core, one dual core) servers with 2GB mem and 150 GB > > allocated to dfs. > > - I use it to crawl multiple supports but mainly filesystems and > > save the results onto hbase (not too many files < 100.000 but rows > > can get > > easily to 30 MB each) > > > > I constantly getting NullPointerExceptions (on the client caused by > > NotServingRegionExceptions on regionserver) when creating tables or > > RegionOfflineExceptions when doing puts or sometimes just time outs. > > When started with hbase I developed in 'local' mode, I then migrated > > to a small dev 2 servers cluster (weaker than production is now) > > where I > > tested the functionality, and it worked fine but, my bad, due to > > pressing > > scheduling I didn't do any real load tests, so the system is now > > continuously going under in production. I've only been able to do a > > full > > crawl by resetting the cluster to one node and putting it in > > 'local' mode. > > > > My question is what can cause regions to be offline in > > regionservers? > > > > I ask so that I can investigate the matter further but having a > > starting point. > > > > I'm willing to help anyway I can but I would really appreciate any > > help and/or starting point and tools for my investigation. > > > > > > Best Regards > > David Alves > >