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https://issues.apache.org/jira/browse/HBASE-21808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16762964#comment-16762964
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Sean Busbey commented on HBASE-21808:
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bq. Would this change be useful for branch-1 too?
it probably would be useful in branch-1; that was my original plan. I can't
recall what issue I ran into when I tried but it was enough that I moved on.
{quote}
bq. IIRC back when we were first adding jdk8 support we could run but not build
and we just put that in a note on the section
I did some testing with JDK 11 late last year and the whole stack (zookeeper,
hadoop, hbase, and in our case phoenix) exhibited a surprising number of unit
test failures at each layer. Zookeeper results were particularly surprising,
and concerning. I would hesitate to claim everything just works given test
failures at every layer, but that could be the case. There is just no way to
verify it.
{quote}
Oh sorry if I wasn't clear. IIRC we specifically went through the integration
tests including ITBLL when running on jdk8 after building with jdk7. I didn't
mean to imply that "if it starts it ships" was the bar.
> 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
> Fix For: 3.0.0, 2.3.0
>
> 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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