So I stopped 0.94 cluster, renamed 0.94 jar file and put back 0.92 jar file. When restarting 0.92 cluster, I found that region server couldn't open -ROOT- region. See: http://pastebin.com/Qqq6qiaw
FYI On Wed, Mar 28, 2012 at 3:54 PM, Ted Yu <[email protected]> wrote: > I planned to perform rolling restart from (our variant of) 0.92 to 0.94.0 > but found out that some internal changes prevented region server to talk to > 0.94.0 master. > So I loaded every server with 0.94.0 jar and started a 5 RS cluster. > I went through master and RS UI. Performed 'balancer' command in shell. > > Didn't do much testing and didn't see issue (therefore no vote). > > Minor comment: yesterday Lars showed me the new percentile metrics added > recently. Since the readings were high, it would be nice to include unit of > time in the String form of RegionLoad. > > Cheers > > > On Tue, Mar 27, 2012 at 11:28 PM, lars hofhansl <[email protected]>wrote: > >> The first 0.94.0 RC is available for download here: >> >> http://people.apache.org/~larsh/hbase-0.94.0-rc0/ >> >> (The tarballs are signed by Stack this time, since I do not have a signed >> Apache key, yet.) >> >> HBase 0.94 is first and foremost a performance release with a few new >> features as well. >> >> It is wire compatible with 0.92.x. 0.92 clients should work with 0.94 >> servers and vice versa. >> >> You can do a rolling restart to get your 0.92.x HBase up on this 0.94.0RC. >> >> The full list of changes is available here: >> >> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12316419 >> . >> >> Please take this RC for a spin, check out the doc, etc, and vote +1/-1 by >> April 4th on whether we should release this as 0.94.0. >> >> Thanks. >> >> -- Lars >> >> >
