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https://issues.apache.org/jira/browse/SPARK-8400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14707421#comment-14707421
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Apache Spark commented on SPARK-8400:
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User 'BryanCutler' has created a pull request for this issue:
https://github.com/apache/spark/pull/8363
> ml.ALS doesn't handle -1 block size
> -----------------------------------
>
> Key: SPARK-8400
> URL: https://issues.apache.org/jira/browse/SPARK-8400
> Project: Spark
> Issue Type: Bug
> Components: ML
> Affects Versions: 1.3.1
> Reporter: Xiangrui Meng
> Assignee: Bryan Cutler
>
> Under spark.mllib, if number blocks is set to -1, we set the block size
> automatically based on the input partition size. However, this behavior is
> not preserved in the spark.ml API. If user sets -1 in Spark 1.3, it will not
> work, but no error messages will show.
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