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https://issues.apache.org/jira/browse/SPARK-9750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14696111#comment-14696111
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Joseph K. Bradley commented on SPARK-9750:
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Discussed with [~mengxr]: The new plan is to NOT revert this JIRA's PR for 1.5.
It should be as safe as it was before (i.e., not safe at all to use these
objects in collections). And we can fix all of these items up for the 1.6
release.
> SparseMatrix should override equals
> -----------------------------------
>
> Key: SPARK-9750
> URL: https://issues.apache.org/jira/browse/SPARK-9750
> Project: Spark
> Issue Type: Bug
> Components: MLlib
> Reporter: Feynman Liang
> Assignee: Feynman Liang
> Priority: Critical
> Fix For: 1.5.0
>
>
> [SparseMatrix|https://github.com/apache/spark/blob/9897cc5e3d6c70f7e45e887e2c6fc24dfa1adada/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala#L479]
> should override equals to ensure that two instances of the same matrix are
> equal.
> This implementation should take into account the {{isTransposed}} flag and
> {{values}} may not be in the same order.
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