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From "Ahmet Altay (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 Thu, 02 Mar 2017 20:13:45 GMT

    [ https://issues.apache.org/jira/browse/BEAM-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15892895#comment-15892895
] 

Ahmet Altay commented on BEAM-1502:
-----------------------------------

DirectRunner should wrap results in container similar to other runners. These results would
not necessarily fit in memory and representing as a list is misleading.

> 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
>
> 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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