[jira] [Created] (FLINK-6996) FlinkKafkaProducer010 doesn't guarantee at-least-once semantic

[Shang Yuanchun (Jira)]

Piotr Nowojski created FLINK-6996:
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             Summary: FlinkKafkaProducer010 doesn't guarantee at-least-once semantic
                 Key: FLINK-6996
                 URL: https://issues.apache.org/jira/browse/FLINK-6996
             Project: Flink
          Issue Type: Bug
          Components: Kafka Connector
    Affects Versions: 1.3.1, 1.2.1, 1.3.0, 1.2.0
            Reporter: Piotr Nowojski
            Assignee: Piotr Nowojski


FlinkKafkaProducer010 doesn't implement CheckpointedFunction interface. This means, when it's used like a "custom operator" (option b from [the java doc|https://ci.apache.org/projects/flink/flink-docs-master/api/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer010.html]) it will not flush the data on "snapshotState"  as it is supposed to.



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