[jira] [Commented] (FLINK-2214) ALS predict and empiricalRisk function can cause hash join function to exceed maximum number of recursions

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-2214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14585741#comment-14585741 ] 

ASF GitHub Bot commented on FLINK-2214:
---------------------------------------

GitHub user tillrohrmann opened a pull request:

    https://github.com/apache/flink/pull/836

    [FLINK-2214] [ml] Adds join hints to ALS to avoid exceeding maximum number of recursions exception

    Fixes prediction join operation and empirical risk join operation of ALS by giving join hint. The user factors and item factors matrices are now used as the build side of the hash join. 

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/tillrohrmann/flink fixALS

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/836.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #836
    
----
commit 60a28de8bf71b5144dd68a1e2d18c04078631541
Author: Till Rohrmann <tr...@apache.org>
Date:   2015-06-08T12:55:20Z

    [FLINK-2214] [ml] Fixes prediction join operation and empirical risk join operation of ALS by giving join hint

----


> ALS predict and empiricalRisk function can cause hash join function to exceed maximum number of recursions
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-2214
>                 URL: https://issues.apache.org/jira/browse/FLINK-2214
>             Project: Flink
>          Issue Type: Bug
>          Components: Machine Learning Library
>            Reporter: Till Rohrmann
>            Priority: Minor
>              Labels: ML
>
> Using the {{predict}} or {{empiricalRisk}} function of the {{ALS}} class can cause the Flink job to fail with a {{Hash join exceeded maximum number of
> recursions}} exceptions. This is due to a wrong build side for the hash join operation.
> This bug should be fixable by setting the correct join hints. 



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