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Posted to issues@beam.apache.org by "Kenneth Knowles (JIRA)" <ji...@apache.org> on 2019/03/19 05:16:00 UTC

[jira] [Updated] (BEAM-184) Using Merging Windows and/or Triggers without a downstream aggregation should fail

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

Kenneth Knowles updated BEAM-184:
---------------------------------
    Labels: backward-incompatible triaged  (was: backward-incompatible)

> 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
>            Priority: Minor
>              Labels: backward-incompatible, triaged
>
> 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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