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https://issues.apache.org/jira/browse/SPARK-14358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15496798#comment-15496798
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Reynold Xin commented on SPARK-14358:
-------------------------------------
[~osayankin] we thought about creating a compatibility package for backward
compatibility, but in this case you can trivially add a JavaSparkListener in
Hive, can't you?
> Change SparkListener from a trait to an abstract class, and remove
> JavaSparkListener
> ------------------------------------------------------------------------------------
>
> Key: SPARK-14358
> URL: https://issues.apache.org/jira/browse/SPARK-14358
> Project: Spark
> Issue Type: Sub-task
> Components: Scheduler, Spark Core
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 2.0.0
>
>
> Scala traits are difficult to maintain binary compatibility on, and as a
> result we had to introduce JavaSparkListener. In Spark 2.0 we can change
> SparkListener from a trait to an abstract class and then remove
> JavaSparkListener.
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