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Posted to issues@storm.apache.org by "Stig Rohde Døssing (JIRA)" <ji...@apache.org> on 2017/08/02 21:11:00 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=16111736#comment-16111736 ] 

Stig Rohde Døssing commented on STORM-2357:
-------------------------------------------

[~mingmxu] I've opened an attempt at this at https://github.com/apache/storm/pull/2249#issuecomment-319798787, please let me know if you are also working on a solution.

> 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: Xu Mingmin
>
> 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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