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https://issues.apache.org/jira/browse/FLINK-23183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fabian Paul updated FLINK-23183:
--------------------------------
Parent: (was: FLINK-20244)
Issue Type: Bug (was: Sub-task)
> Lost ACKs for redelivered messages in RMQSource
> ------------------------------------------------
>
> Key: FLINK-23183
> URL: https://issues.apache.org/jira/browse/FLINK-23183
> Project: Flink
> Issue Type: Bug
> Components: Connectors/ RabbitMQ
> Affects Versions: 1.13.1, 1.12.4
> Reporter: Michał Ciesielczyk
> Assignee: Michał Ciesielczyk
> Priority: Major
>
> As described in the FLINK-20244, the redelivered messages are not
> acknowledged properly (only applicable when autoAck is disabled). When used
> with a prefetch count in the consumer it may even lead to stop the source to
> consume any more messages.
> The solution (proposed in FLINK-20244) should resolve the issue. All
> successfully consumed RMQ messages should be acknowledged, regardless of
> whether the message is ignored or processed further in the pipeline. The
> {{sessionIds.add(deliveryTag)}}
> ([RMQSource.java#L423|https://github.com/apache/flink/blob/master/flink-connectors/flink-connector-rabbitmq/src/main/java/org/apache/flink/streaming/connectors/rabbitmq/RMQSource.java#L423])
> should be called before checking if the message has already been processed.
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