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https://issues.apache.org/jira/browse/HBASE-13339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14521920#comment-14521920
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Chris Nauroth commented on HBASE-13339:
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bq. Rolling downgrade not being there yet is kind of scary though.
Just to make sure I communicated this clearly, downgrade has been there since
2.4.0 for the use case of rolling upgrades that do not involve HDFS metadata
changes. For example, downgrade from 2.5.2 to 2.5.1 was already possible. The
new work that I mentioned is aimed at expanding the use cases covered by
downgrade, so that it's usable even after certain kinds of metadata changes.
> Update default Hadoop version to 2.6.0
> --------------------------------------
>
> Key: HBASE-13339
> URL: https://issues.apache.org/jira/browse/HBASE-13339
> Project: HBase
> Issue Type: Bug
> Components: build
> Affects Versions: 2.0.0, 1.1.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Priority: Blocker
> Fix For: 2.0.0, 1.2.0
>
> Attachments: HBASE-13339-v1.patch, HBASE-13339.patch
>
>
> Current default Hadoop version is getting a little long in the tooth. We
> should update to the latest version. The latest version is backwards
> compatible with 2.5.1's dfs and mr so this should be painless.
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