[jira] [Commented] (IGNITE-9055) [ML] SVM throws NPE in case of empty partitions

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

    [ https://issues.apache.org/jira/browse/IGNITE-9055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16553064#comment-16553064 ] 

ASF GitHub Bot commented on IGNITE-9055:
----------------------------------------

GitHub user dmitrievanthony opened a pull request:

    https://github.com/apache/ignite/pull/4412

    IGNITE-9055 Update Cache Based Dataset so that it ignores empty parts

    

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

    $ git pull https://github.com/gridgain/apache-ignite ignite-9055

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

    https://github.com/apache/ignite/pull/4412.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 #4412
    
----
commit 2d723a675aad7e2263cea69fe0198ef118c0515b
Author: Anton Dmitriev <dm...@...>
Date:   2018-07-23T16:18:59Z

    IGNITE-9055 Update Cache Based Dataset so that it ignores empty parts.

----


> [ML] SVM throws NPE in case of empty partitions
> -----------------------------------------------
>
>                 Key: IGNITE-9055
>                 URL: https://issues.apache.org/jira/browse/IGNITE-9055
>             Project: Ignite
>          Issue Type: Bug
>          Components: ml
>    Affects Versions: 2.5, 2.6
>            Reporter: Anton Dmitriev
>            Assignee: Anton Dmitriev
>            Priority: Major
>             Fix For: 2.7
>
>
> Method calculateUpdates throws NPE in case of empty partitions. Reduce function user in this method doesn't handle correctly empty arguments ((a, b) -> a == null ? b : a.plus(b))).
> We need to fix this reduce function or update Partition Based Dataset so that it doesn't emit empty arguments.



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