[jira] [Commented] (HBASE-21808) Ensure we can build with JDK11 targetting JDK8

["Josh Elser (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-21808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758485#comment-16758485 ] 

Josh Elser commented on HBASE-21808:
------------------------------------

Tested this out locally and it works just fine (building HBase for jdk8 using jdk11). You have my +1

Looking again at [https://hbase.apache.org/book.html#java] – is it worth our adding another table for JDK compatibility: supported JDK for building vs. support JDK for running?

> Ensure we can build with JDK11 targetting JDK8
> ----------------------------------------------
>
>                 Key: HBASE-21808
>                 URL: https://issues.apache.org/jira/browse/HBASE-21808
>             Project: HBase
>          Issue Type: Improvement
>          Components: build, community, java
>    Affects Versions: 3.0.0
>            Reporter: Sean Busbey
>            Assignee: Sean Busbey
>            Priority: Major
>         Attachments: HBASE-21808.0.patch
>
>
> When folks "install a JDK" wether they get JDK11 now will depend on the platform (e.g. from homebrew you will get jdk11). For new contributors this results in confusing errors on first run.
> Make it so that a non-release build using JDK11 and using our default compiler source/target versions of JDK8 can complete.



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