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From "Martin Liesenberg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3404) Extend Kafka consumers with interface StoppableFunction
Date Fri, 29 Apr 2016 12:24:13 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15263977#comment-15263977

Martin Liesenberg commented on FLINK-3404:

I have been looking at this task recently and just want to make sure I understand it correctly:
there are a {{close}} and a {{cancel}} method already. the difference of the {{stop}} method
would be the issuing of the checkpoint, right?

> Extend Kafka consumers with interface StoppableFunction
> -------------------------------------------------------
>                 Key: FLINK-3404
>                 URL: https://issues.apache.org/jira/browse/FLINK-3404
>             Project: Flink
>          Issue Type: Improvement
>          Components: Kafka Connector
>            Reporter: Matthias J. Sax
> Kafka consumers are not stoppable right now. To make them stoppable, they must implement
{{StoppableFunction}}. Implementing method {{stop()}} must ensure, that the consumer stops
pulling new messages from Kafka and issues a final checkpoint with the last offset. Afterwards,
{{run()}} must return.
> When implementing this, keep in mind, that the gathered checkpoint might later be used
as a savepoint.

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