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From "Kenneth Knowles (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (BEAM-184) Using Merging Windows and/or Triggers without a downstream aggregation should fail
Date Thu, 09 Mar 2017 19:21:38 GMT

     [ https://issues.apache.org/jira/browse/BEAM-184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kenneth Knowles reassigned BEAM-184:
------------------------------------

    Assignee: Thomas Groh

> Using Merging Windows and/or Triggers without a downstream aggregation should fail
> ----------------------------------------------------------------------------------
>
>                 Key: BEAM-184
>                 URL: https://issues.apache.org/jira/browse/BEAM-184
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-core
>            Reporter: Ben Chambers
>            Assignee: Thomas Groh
>            Priority: Minor
>              Labels: backward-incompatible
>             Fix For: First stable release
>
>
> Both merging windows (such as sessions) and triggering only actually happen at an aggregation
(GroupByKey). We should produce errors in any of these cases:
> 1. Merging window used without a downstream GroupByKey
> 2. Triggers used without a downstream GroupByKey
> 3. Window inspected after inserting a merging window and before the GroupByKey



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