apache / apache/beam

OnWindowExpiration is not supported for portable runners

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beam-model new feature P3
Dominant language
Java
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Description

Add support for @OnWindowExpiration to portable runners.

Imported from Jira [BEAM-13614](https://issues.apache.org/jira/browse/BEAM-13614). Original Jira may contain additional context.
Reported by: lcwik.

Contributor guide

Open the contributing guide

Research direction

Start by reading the issue and the imported Jira ticket BEAM-13614 for the missing context, then trace how portable runners handle window expiration and the @OnWindowExpiration annotation. Done means portable runners support this annotation with appropriate coverage, but the issue does not name relevant files or tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
data-engineering, distributed-systems, stream-processing
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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