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https://issues.apache.org/jira/browse/SPARK-4819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15074380#comment-15074380
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Apache Spark commented on SPARK-4819:
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User 'srowen' has created a pull request for this issue:
https://github.com/apache/spark/pull/10513
> 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: Sean Owen
> Attachments: SPARK_4819_null_do_not_merge.patch
>
>
> 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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