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https://issues.apache.org/jira/browse/SPARK-5976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14335464#comment-14335464
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Apache Spark commented on SPARK-5976:
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User 'mengxr' has created a pull request for this issue:
https://github.com/apache/spark/pull/4748
> Factors returned by ALS do not have partitioners associated.
> ------------------------------------------------------------
>
> Key: SPARK-5976
> URL: https://issues.apache.org/jira/browse/SPARK-5976
> Project: Spark
> Issue Type: Bug
> Components: ML, MLlib
> Affects Versions: 1.3.0
> Reporter: Xiangrui Meng
> Assignee: Xiangrui Meng
> Priority: Critical
>
> The model trained by ALS requires partitioning information to do quick lookup
> of a user/item factor for making recommendation on individual requests. In
> the new implementation, we don't put partitioners with ALS, which would cause
> performance regression.
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