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From "Josh Rosen (JIRA)" <>
Subject [jira] [Commented] (SPARK-2321) Design a proper progress reporting & event listener API
Date Tue, 07 Oct 2014 21:51:33 GMT


Josh Rosen commented on SPARK-2321:

I've opened a WIP pull request in order to discuss the design / implementation of a pull-based
progress / status API:  I'd like to focus on discussing
the most high-level interface / API design decisions now; once we're happy with those decisions,
we can focus on the details of which pieces of data to expose, etc.

> Design a proper progress reporting & event listener API
> -------------------------------------------------------
>                 Key: SPARK-2321
>                 URL:
>             Project: Spark
>          Issue Type: Improvement
>          Components: Java API, Spark Core
>    Affects Versions: 1.0.0
>            Reporter: Reynold Xin
>            Assignee: Josh Rosen
>            Priority: Critical
> This is a ticket to track progress on redesigning the SparkListener and JobProgressListener
> 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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