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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/12/08 20:59:59 UTC

[jira] [Assigned] (SPARK-18790) Keep a general offset history of stream batches

     [ https://issues.apache.org/jira/browse/SPARK-18790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-18790:
------------------------------------

    Assignee: Apache Spark

> Keep a general offset history of stream batches
> -----------------------------------------------
>
>                 Key: SPARK-18790
>                 URL: https://issues.apache.org/jira/browse/SPARK-18790
>             Project: Spark
>          Issue Type: Improvement
>          Components: Structured Streaming
>            Reporter: Tyson Condie
>            Assignee: Apache Spark
>
> Instead of only keeping the minimum number of offsets around, we should keep enough information to allow us to roll back n batches and reexecute the stream starting from a given point. In particular, we should create a config in SQLConf, spark.sql.streaming.retainedBatches that defaults to 100 and ensure that we keep enough log files in the following places to roll back the specified number of batches:
> the offsets that are present in each batch
> versions of the state store
> the files lists stored for the FileStreamSource
> the metadata log stored by the FileStreamSink



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