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Posted to commits@beam.apache.org by "Ben Chambers (JIRA)" <ji...@apache.org> on 2016/04/09 00:15:25 UTC

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

Ben Chambers created BEAM-184:
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             Summary: 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: Davor Bonaci
            Priority: Minor


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 GroupuByKey
3. Window inspected after inserting a merging window and before the GroupByKey



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