Haibo Sun created FLINK-14239:
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Summary: Emitting the max watermark in StreamSource#run may cause
it to arrive the downstream early
Key: FLINK-14239
URL: https://issues.apache.org/jira/browse/FLINK-14239
Project: Flink
Issue Type: Bug
Reporter: Haibo Sun
Fix For: 1.10.0
For {{Source}}, the max watermark is emitted in {{StreamSource#run}} currently.
If some records are also output in {{close}} of {{RichSourceFunction}}, then
the max watermark will reach the downstream operator before these records.
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