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From Ted Yu <yuzhih...@gmail.com>
Subject Re: ANN: The first hbase 0.94.0 release candidate is available for download
Date Wed, 28 Mar 2012 23:10:32 GMT
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 <yuzhihong@gmail.com> 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 <lhofhansl@yahoo.com>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
>>
>>
>

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