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From "Sean Owen (JIRA)" <>
Subject [jira] [Commented] (SPARK-17669) Strange behavior using Datasets
Date Mon, 26 Sep 2016 21:06:20 GMT


Sean Owen commented on SPARK-17669:

It's hard to say what is going on without knowing what you're executing. Lots of things changed
in 2.0, and it's not inconceivable that some things actually go slower. 

> Strange behavior using Datasets
> -------------------------------
>                 Key: SPARK-17669
>                 URL:
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL, Web UI
>    Affects Versions: 2.0.0
>            Reporter: Miles Crawford
> I recently migrated my application to Spark 2.0, and everything worked well, except for
one function that uses "toDS" and the ML libraries.
> This stage used to complete in 15 minutes or so on 1.6.2, and now takes almost two hours.
> The UI shows very strange behavior - completed stages still being worked on, concurrent
work on tons of stages, including ones from downstream jobs:
> The only source change I made was changing "toDF" to "toDS()" before handing my RDDs
to the ML libraries.

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