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Posted to issues@spark.apache.org by "Michael Armbrust (JIRA)" <ji...@apache.org> on 2016/11/01 23:35:58 UTC
[jira] [Updated] (SPARK-17829) Stable format for offset log
[ https://issues.apache.org/jira/browse/SPARK-17829?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Armbrust updated SPARK-17829:
-------------------------------------
Issue Type: Improvement (was: Sub-task)
Parent: (was: SPARK-8360)
> Stable format for offset log
> ----------------------------
>
> Key: SPARK-17829
> URL: https://issues.apache.org/jira/browse/SPARK-17829
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Reporter: Michael Armbrust
> Assignee: Tyson Condie
>
> Currently we use java serialization for the WAL that stores the offsets contained in each batch. This has two main issues:
> - It can break across spark releases (though this is not the only thing preventing us from upgrading a running query)
> - It is unnecessarily opaque to the user.
> I'd propose we require offsets to provide a user readable serialization and use that instead. JSON is probably a good option.
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