Public service announcement: Our doc build has worked with Java 8 for brief time periods, but new changes keep breaking the Java 8 unidoc build.  Please be aware of this, and try to test doc changes with Java 8!  In general, it is stricter than Java 7 for docs.

A shout out to @HyukjinKwon and others who have made many fixes for this!  See these sample PRs for some issues causing failures (especially around links):
https://github.com/apache/spark/pull/16741
https://github.com/apache/spark/pull/16604

Thanks,
Joseph

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Joseph Bradley

Software Engineer - Machine Learning

Databricks, Inc.

http://databricks.com