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https://issues.apache.org/jira/browse/FLINK-7637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16216701#comment-16216701
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ASF GitHub Bot commented on FLINK-7637:
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Github user tzulitai commented on the issue:
https://github.com/apache/flink/pull/4871
@pnowojski @aljoscha @bowenli86 thanks a lot for the reviews.
I've either addressed them with the follow up commits or left comments.
> FlinkKinesisProducer violates at-least-once guarantees
> ------------------------------------------------------
>
> Key: FLINK-7637
> URL: https://issues.apache.org/jira/browse/FLINK-7637
> Project: Flink
> Issue Type: Bug
> Components: Kinesis Connector
> Reporter: Tzu-Li (Gordon) Tai
> Assignee: Tzu-Li (Gordon) Tai
> Priority: Blocker
> Fix For: 1.4.0, 1.3.3
>
>
> Currently, there is no flushing of KPL outstanding records on checkpoints in
> the {{FlinkKinesisProducer}}. Likewise to the at-least-once issue on the
> Flink Kafka producer before, this may lead to data loss if there are
> asynchronous failing records after a checkpoint which the records was part of
> was completed.
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