Thomas Groh created BEAM-2100:
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Summary: Improve error message for shifting elements back in time
Key: BEAM-2100
URL: https://issues.apache.org/jira/browse/BEAM-2100
Project: Beam
Issue Type: Improvement
Components: sdk-java-core
Reporter: Thomas Groh
Fix For: First stable release
When an element is shifted forwards in time (often to the end of the Global
Window) as a result of a GroupByKey, they can't be reassigned the timestamps
the user expects. This is fine, but users don't understand why the elements
have been shifted forwards, and we should improve the messaging around this
error.
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