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Posted to issues@flink.apache.org by "Chesnay Schepler (Jira)" <ji...@apache.org> on 2022/07/13 13:19:00 UTC

[jira] [Created] (FLINK-28538) Eagerly emit a watermark the first time we exceed Long.MIN_VALUE

Chesnay Schepler created FLINK-28538:
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             Summary: Eagerly emit a watermark the first time we exceed Long.MIN_VALUE
                 Key: FLINK-28538
                 URL: https://issues.apache.org/jira/browse/FLINK-28538
             Project: Flink
          Issue Type: Improvement
          Components: API / DataStream
            Reporter: Chesnay Schepler
             Fix For: 1.16.0


The built-in watermark generators are set up to start with a Long.MIN_VALUE watermark, that is updated on each event and periodically emitted later on.

As a result, before the first periodic emission is triggered (shortly after job (re)start) no element is ever considered late.

We should be able to remedy that by emitting a watermark on the first event.



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