[jira] [Commented] (SPARK-4964) Exactly-once + WAL-free Kafka Support in Spark Streaming

["Tathagata Das (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-4964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14293140#comment-14293140 ] 

Tathagata Das commented on SPARK-4964:
--------------------------------------

[~dibbhatt][~jerryshao][~hshreedharan][~cody@koeninger.org] 
Please take a look at the design doc and comment on it. 
Thank you very much!



> Exactly-once + WAL-free Kafka Support in Spark Streaming
> --------------------------------------------------------
>
>                 Key: SPARK-4964
>                 URL: https://issues.apache.org/jira/browse/SPARK-4964
>             Project: Spark
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Cody Koeninger
>
> There are two issues with the current Kafka support 
>  - Use of Write Ahead Logs in Spark Streaming to ensure no data is lost - Causes data replication in both Kafka AND Spark Streaming. 
>  - Lack of exactly-once semantics - For background, see http://apache-spark-developers-list.1001551.n3.nabble.com/Which-committers-care-about-Kafka-td9827.html
> We want to solve both these problem in JIRA. Please see the following design doc for the solution. 
> https://docs.google.com/a/databricks.com/document/d/1IuvZhg9cOueTf1mq4qwc1fhPb5FVcaRLcyjrtG4XU1k/edit#heading=h.itproy77j3p



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