On Mon, Jul 28, 2014 at 8:39 PM, anil gupta <[email protected]> wrote:
> Please find my reply inline. > > > On Mon, Jul 28, 2014 at 6:09 PM, Stack <[email protected]> wrote: > > > On Mon, Jul 28, 2014 at 5:45 PM, anil gupta <[email protected]> > wrote: > > > > > Hi Stack, > > > > > > I basically did full table scan for hbase:meta by running this(since > > > cluster has 2-3 regions only): scan 'hbase:meta', {RAW => true, > VERSIONS > > => > > > 10} > > > Output of above query shows rows for "hbase:namespace" and "dummy" > table. > > > So, it seems like hbase:meta doesn't have any old data. > > > > > > > > Yeah. Check size of the hbase:meta region. If small, yeah, may not have > > the above. If you look around in hdfs, you see an old .META. dir? > > > > Anil: Yes, it looks like this dir "/hbase/.META." has data of meta table > before upgrade to 0.98. Are there any non-backward compatible changes in > META? > Is it possible to just import the HFile of 0.94 in hbase:meta table? It > seems like directory structure under hdfs has changes in 0.98. I am unable > to find directories for a table "dummy" i created in 0.98. > > I think what happened is that because you failed run the upgrade script, 0.98 tried to start over a 0.94 and complained about the hbase.version file it found because it had not be protobuf'd. You did what I would have done, 'fixed it', by removing the obstacle only when hbase does not find an hbase.version, it thinks it all a fresh install. Without knowing much more, if you put back a 0.94 era hbase.version in place of the one written by 0.98, then you ran the upgrade script, I wonder if that'd fix it? > > > Our sysadmin team is still trying to locate all the logs. However, i > > > remember one error that i resolved. I was related to "hbase.versions" > > file. > > > It was some complaint about Protbouf version. I deleted hbase.versions > > file > > > and then HBase came up. > > > > > > Hmm. So, it probably thought this a new install and just created the new > > layout. Is the old 0.94 data is adjacent to the new layout? > > > Anil: Yes, that's what i feel. The upgrade happened as it was a fresh > install. Does it seems like a bug in upgrade? > > Well, if you ended up in this state, yeah, there is a problem with it. St.Ack
