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From Jonathan Hung <jyhung2...@gmail.com>
Subject [DISCUSS] Moving branch-2 to java 8
Date Mon, 28 Jan 2019 19:24:52 GMT
Hi folks,

Forking a discussion based on HADOOP-15711. To summarize, there are issues
with branch-2 tests running on java 7 (openjdk) which don't exist on java
8. From our testing, the build can pass with openjdk 8.

For branch-3, the work to move the build to use java 8 was done in
HADOOP-14816 as part of the Dockerfile OS version change. HADOOP-16053 was
filed to backport this OS version change to branch-2 (but without the java
7 -> java 8 change). So my proposal is to also make the java 7 -> java 8
version change in branch-2.

As mentioned in HADOOP-15711, the main issue is around source and binary
compatibility. I don't currently have a great answer, but one initial
thought is to build source/binary against java 7 to ensure compatibility
and run the rest of the build as java 8.

Thoughts?

Jonathan Hung

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