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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 23:22:35 GMT
After brief review of HBASE-5074 code, I think this call at line 214 of
FixedFileTrailer.serialize() caused what I saw:
     baosDos.writeInt(materializeVersion(majorVersion, minorVersion));
where 16777218 corresponds to majorVersion of 2 and minorVersion of 1.

Cheers

On Wed, Mar 28, 2012 at 4:10 PM, Ted Yu <yuzhihong@gmail.com> wrote:

> 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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