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

["Till Rohrmann (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-6996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till Rohrmann reopened FLINK-6996:
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There seems to be a test instability with {{Kafka010ProducerITCase>KafkaProducerTestBase.testOneToOneAtLeastOnceRegularSink}}.

https://s3.amazonaws.com/archive.travis-ci.org/jobs/258538641/log.txt

> 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: 1.2.0, 1.3.0, 1.2.1, 1.3.1
>            Reporter: Piotr Nowojski
>            Assignee: Piotr Nowojski
>            Priority: Blocker
>             Fix For: 1.4.0, 1.3.2
>
>
> FlinkKafkaProducer010 doesn't implement CheckpointedFunction interface. This means, when it's used like a "regular sink function" (option a 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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