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From "Richard Wilkinson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-23978) Kryo much slower when mllib jar not on classpath
Date Fri, 13 Apr 2018 12:48:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-23978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Richard Wilkinson updated SPARK-23978:
--------------------------------------
    Attachment: kryo_stats.png

> Kryo much slower when mllib jar not on classpath
> ------------------------------------------------
>
>                 Key: SPARK-23978
>                 URL: https://issues.apache.org/jira/browse/SPARK-23978
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.3.0
>         Environment: Windows 10, Java 8
>            Reporter: Richard Wilkinson
>            Priority: Major
>         Attachments: kryo_stats.png
>
>
> Spark 2.3 added a bunch of org.apache.spark.ml and org.apache.spark.mllib classes to
the kryo registration, but it does this via class.forName.
> If the mllib jar is not on the classpath, this can be very slow.
> My app, which is using GraphX connected components function is 2x slower in 2.3 than
2.2.1
>  



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