[HBASE-20501] Change the Hadoop minimum version to 2.7.1

• Type: Task
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.1.0, 1.5.0
• Component/s: community, documentation
• Hadoop Flags: Incompatible change

Release Note

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HBase is no longer able to maintain compatibility with Apache Hadoop versions that are no longer receiving updates. This release raises the minimum supported version to Hadoop 2.7.1. Downstream users are strongly advised to upgrade to the latest Hadoop 2.7 maintenance release.

Downstream users of earlier HBase versions are similarly advised to upgrade to Hadoop 2.7.1+. When doing so, it is especially important to follow the guidance from [the HBase Reference Guide's Hadoop section](http://hbase.apache.org/book.html#hadoop) on replacing the Hadoop artifacts bundled with HBase.

• Assignee: Sean Busbey
• Reporter: Andrew Kyle Purtell
• Created: 27/Apr/18 20:23
• Updated: 23/Jun/22 19:30
• Resolved: 31/May/18 02:41

Description

See discussion thread on dev@ "[DISCUSS] Branching for HBase 1.5 and Hadoop minimum version update (to 2.7)"

Consensus

• This is a needed change due to the practicalities of having Hadoop as a dependency
• Let's move up the minimum supported version of Hadoop to 2.7.1.
• Update documentation (support matrix, compatibility discussion) to call this out.
• Be sure to call out this change in the release notes.
• Take the opportunity to remind users about our callout "Replace the Hadoop Bundled With HBase!" recommending users upgrade their Hadoop if < 2.7.1.

Issue Links

• relates to: HBASE-20502 Document HBase incompatible with Yarn 2.9.0 and 3.0.x due to YARN-7190
• links to: [DISCUSS] Branching for HBase 1.5 and Hadoop minimum version update (to 2.7)