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https://issues.apache.org/jira/browse/SPARK-22716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Li updated SPARK-22716:
----------------------------
    Issue Type: Sub-task  (was: Improvement)
        Parent: SPARK-22510

> Avoid the creation of mutable states in addReferenceObj
> -------------------------------------------------------
>
>                 Key: SPARK-22716
>                 URL: https://issues.apache.org/jira/browse/SPARK-22716
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Wenchen Fan
>            Assignee: Marco Gaido
>             Fix For: 2.3.0
>
>
> `ctx.addReferenceObj` creats a global variable just for referring an object, 
> which seems an overkill. We should revisit it and always use 
> `ctx.addReferenceMinorObj`



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