[jira] [Created] (FLINK-8992) Implement source and operator that validate exactly-once

[Shang Yuanchun (Jira)]

Stefan Richter created FLINK-8992:
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             Summary: Implement source and operator that validate exactly-once
                 Key: FLINK-8992
                 URL: https://issues.apache.org/jira/browse/FLINK-8992
             Project: Flink
          Issue Type: Sub-task
          Components: Tests
    Affects Versions: 1.5.0
            Reporter: Stefan Richter
            Assignee: Stefan Richter


We can build this with sources that emit sequences per key and a stateful (keyed) operator that validate for the update of each key that the new value is the old value + 1. This can help to easily detect if events/state were lost or duplicates.



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