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https://issues.apache.org/jira/browse/HADOOP-16219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16804465#comment-16804465
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Steve Loughran commented on HADOOP-16219:
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> just to be clear, this flies directly in the face of our compatibility
>guidelines by being an incompatible change in a minor version release, right?
well it would be, if we didn't explicitly call out JVM EOL as something that
can force an update
https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/Compatibility.html#Policies
> [JDK8] Set minimum version of Hadoop 2 to JDK 8
> -----------------------------------------------
>
> Key: HADOOP-16219
> URL: https://issues.apache.org/jira/browse/HADOOP-16219
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build
> Affects Versions: 2.10.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Attachments: HADOOP-16219-branch-2-001.patch
>
>
> Java 7 is long EOL; having branch-2 require it is simply making the release
> process a pain (we aren't building, testing, or releasing on java 7 JVMs any
> more, are we?).
> Staying on java 7 complicates backporting, JAR updates for CVEs (hello
> Guava!) &c are becoming impossible.
> Proposed: increment javac.version = 1.8
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