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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