Marcelo Vanzin created SPARK-4819:
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Summary: Remove Guava's "Optional" from public API
Key: SPARK-4819
URL: https://issues.apache.org/jira/browse/SPARK-4819
Project: Spark
Issue Type: Task
Components: Spark Core
Affects Versions: 1.2.0
Reporter: Marcelo Vanzin
Filing this mostly so this isn't forgotten. Spark currently exposes Guava types
in its public API (the {{Optional}} class is used in the Java bindings). This
makes it hard to properly hide Guava from user applications, and makes mixing
different Guava versions with Spark a little sketchy (even if things should
work, since those classes are pretty simple in general).
Since this changes the public API, it has to be done in a release that allows
such breakages. But it would be nice to at least have a transition plan for
deprecating the affected APIs.
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