[jira] [Resolved] (SPARK-4898) Replace cloudpickle with Dill

["Josh Rosen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-4898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Josh Rosen resolved SPARK-4898.
-------------------------------
    Resolution: Won't Fix

I'm going to close this as "Won't Fix" for now, since Dill didn't turn out to be a blocker for Python 3 and there doesn't seem to be a compelling reason to switch to it, especially since doing so may carry a high risk of introducing regressions.

> Replace cloudpickle with Dill
> -----------------------------
>
>                 Key: SPARK-4898
>                 URL: https://issues.apache.org/jira/browse/SPARK-4898
>             Project: Spark
>          Issue Type: Improvement
>          Components: PySpark
>            Reporter: Josh Rosen
>
> We should consider replacing our modified version of {{cloudpickle}} with [Dill|https://github.com/uqfoundation/dill], since it supports both Python 2 and 3 and might do a better job of handling certain corner-cases.
> I attempted to do this a few months ago but ran into cases where Dill had issues pickling objects defined in doctests, which broke our test suite: https://github.com/uqfoundation/dill/issues/50.  This issue may have been resolved now; I haven't checked.



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