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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-1502) CombinePerKey returns a list of lists when run locally, but something else when run on Dataflow
Date Mon, 17 Jul 2017 20:58:00 GMT

    [ https://issues.apache.org/jira/browse/BEAM-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16090545#comment-16090545
] 

ASF GitHub Bot commented on BEAM-1502:
--------------------------------------

GitHub user robertwb opened a pull request:

    https://github.com/apache/beam/pull/3578

    [BEAM-1502] GroupByKey should not return bare lists in DirectRunner.

    This leads to invalidated expectations on other runners.
    
    Be sure to do all of the following to help us incorporate your contribution
    quickly and easily:
    
     - [ ] Make sure the PR title is formatted like:
       `[BEAM-<Jira issue #>] Description of pull request`
     - [ ] Make sure tests pass via `mvn clean verify`.
     - [ ] Replace `<Jira issue #>` in the title with the actual Jira issue
           number, if there is one.
     - [ ] If this contribution is large, please file an Apache
           [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf).
    
    ---


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

    $ git pull https://github.com/robertwb/incubator-beam stream-iter

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

    https://github.com/apache/beam/pull/3578.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 #3578
    
----
commit 61a3179e38d4eb19eb4815564b9ca494591b8945
Author: Robert Bradshaw <robertwb@google.com>
Date:   2017-07-17T20:44:40Z

    [BEAM-1502] GroupByKey should not return bare lists in DirectRunner.
    
    This leads to invalidated expectations on other runners.

----


> CombinePerKey returns a list of lists when run locally, but something else when run on
Dataflow
> -----------------------------------------------------------------------------------------------
>
>                 Key: BEAM-1502
>                 URL: https://issues.apache.org/jira/browse/BEAM-1502
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py
>            Reporter: Pablo Estrada
>            Assignee: Charles Chen
>
> GroupByKey also has this issue. This has been seen by customers internally and externally:
> http://stackoverflow.com/questions/42276520/dataflow-0-5-5-what-does-object-of-type-unwindowedvalues-has-no-len-mean/42283279#42283279



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