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https://issues.apache.org/jira/browse/HBASE-2233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13040517#comment-13040517
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Todd Lipcon commented on HBASE-2233:
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Do any of the 0.22 incompatibilities seem like things that are Hadoop's fault?
Or all cases where we've used somewhat internal APIs like UGI?
> Support both Hadoop 0.20, 0.21, and 0.22
> ----------------------------------------
>
> Key: HBASE-2233
> URL: https://issues.apache.org/jira/browse/HBASE-2233
> Project: HBase
> Issue Type: New Feature
> Reporter: Jean-Daniel Cryans
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: 2233-v2.txt, 2233.txt, pom.to.go.against.hadoop.trunk.txt
>
>
> Since Hadoop 0.21 isn't going to be well supported and that a lot of users
> may wish to stick on 0.20, the next HBase major release should support both
> 0.20 and 0.21.
> HDFS-265 support will be swapped for HDFS-200 if running on HDFS 0.20. A
> cluster without that patchset shouldn't be supported.
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