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Hadoop, mail # user - upgrade from Hadoop 0.21.0 to a newer version??

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Re: upgrade from Hadoop 0.21.0 to a newer version??
Allen Wittenauer 2011-08-22, 04:08

On Aug 19, 2011, at 12:39 AM, steven zhuang wrote:

>          I updated my hadoop cluster from 0.20.2 to higher version
> 0.21.0 because of MAPREDUCE-1286, and now I have problem running a Hbase on
> it.
>          I saw the 0.21.0 version is marked as "unstable, unsupported, does
> not include security".
>        My question is that can I upgrade the cluster from 0.21.0 to a newer
> version say 0.20.203 or future version 0.22?

You won't be able to "side-grade" to 0.20.203/204.  You should be able to upgrade to 0.22, 0.23, etc.  Just be sure to process your edits file *prior* to upgrading.  Otherwise it might explode.