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https://issues.apache.org/jira/browse/SPARK-2321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14218502#comment-14218502
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Patrick Wendell commented on SPARK-2321:
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Currently this a programmatic API for Spark applications to know their own
progress. The task in this JIRA was just to stabilize existing interfaces. It's
not a reporting API for external services to query progress. That is probably
best to roll-up with a general REST API for exposing specifics of a Spark
application.
> Design a proper progress reporting & event listener API
> -------------------------------------------------------
>
> Key: SPARK-2321
> URL: https://issues.apache.org/jira/browse/SPARK-2321
> Project: Spark
> Issue Type: Improvement
> Components: Java API, Spark Core
> Affects Versions: 1.0.0
> Reporter: Reynold Xin
> Assignee: Josh Rosen
> Priority: Critical
> Fix For: 1.2.0
>
>
> This is a ticket to track progress on redesigning the SparkListener and
> JobProgressListener API.
> There are multiple problems with the current design, including:
> 0. I'm not sure if the API is usable in Java (there are at least some enums
> we used in Scala and a bunch of case classes that might complicate things).
> 1. The whole API is marked as DeveloperApi, because we haven't paid a lot of
> attention to it yet. Something as important as progress reporting deserves a
> more stable API.
> 2. There is no easy way to connect jobs with stages. Similarly, there is no
> easy way to connect job groups with jobs / stages.
> 3. JobProgressListener itself has no encapsulation at all. States can be
> arbitrarily mutated by external programs. Variable names are sort of randomly
> decided and inconsistent.
> We should just revisit these and propose a new, concrete design.
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