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Posted to issues@storm.apache.org by "Jungtaek Lim (JIRA)" <ji...@apache.org> on 2017/09/29 05:35:00 UTC

[jira] [Commented] (STORM-2357) add At-Most-Once guarantee in KafkaSpout

    [ https://issues.apache.org/jira/browse/STORM-2357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16185378#comment-16185378 ] 

Jungtaek Lim commented on STORM-2357:
-------------------------------------

The one pull request addresses both of the issues.

> add At-Most-Once guarantee in KafkaSpout
> ----------------------------------------
>
>                 Key: STORM-2357
>                 URL: https://issues.apache.org/jira/browse/STORM-2357
>             Project: Apache Storm
>          Issue Type: Bug
>          Components: storm-kafka-client
>            Reporter: Xu Mingmin
>            Assignee: Stig Rohde Døssing
>             Fix For: 2.0.0
>
>
> KafkaSpout cannot guarantee exactly at-most-once semantic, as it commits offset periodically, and KafkaSpout.close() is not guarantee to call when a crash happens. 



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