[jira] [Assigned] (SPARK-4819) Remove Guava's "Optional" from public API

["Reynold Xin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-4819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin reassigned SPARK-4819:
----------------------------------

    Assignee: Reynold Xin

> Remove Guava's "Optional" from public API
> -----------------------------------------
>
>                 Key: SPARK-4819
>                 URL: https://issues.apache.org/jira/browse/SPARK-4819
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Spark Core
>    Affects Versions: 1.2.0
>            Reporter: Marcelo Vanzin
>            Assignee: Reynold Xin
>
> 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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