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https://issues.apache.org/jira/browse/KYLIN-3581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16626820#comment-16626820
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XiaoXiang Yu commented on KYLIN-3581:
-------------------------------------
[https://www.artima.com/lejava/articles/equality.html]
Pitfall #3: Defining equals in terms of mutable fields
> compareTo method should be paired with equals method
> ----------------------------------------------------
>
> Key: KYLIN-3581
> URL: https://issues.apache.org/jira/browse/KYLIN-3581
> Project: Kylin
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: XiaoXiang Yu
> Priority: Minor
> Fix For: v2.4.2, v2.5.1
>
>
> DoggedCubeBuilder$MergeSlot and InMemCubeBuilder$CuboidTask define compareTo
> method.
> They should define equals method as well.
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