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Posted to issues@spark.apache.org by "Liwei Lin (JIRA)" <ji...@apache.org> on 2016/11/24 06:23:58 UTC

[jira] [Closed] (SPARK-18552) Watermark should not rely on sinks to proceed

     [ https://issues.apache.org/jira/browse/SPARK-18552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Liwei Lin closed SPARK-18552.
-----------------------------
    Resolution: Not A Problem

> Watermark should not rely on sinks to proceed
> ---------------------------------------------
>
>                 Key: SPARK-18552
>                 URL: https://issues.apache.org/jira/browse/SPARK-18552
>             Project: Spark
>          Issue Type: Bug
>          Components: Structured Streaming
>            Reporter: Liwei Lin
>            Priority: Critical
>
> Today for watermark to be collected and proceed correctly, a sink should trigger the real execution the dataset it received in every batch.
> However, during the recovery process, a sink might skip a batch (such as in https://github.com/apache/spark/blob/v2.0.2/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/memory.scala#L202-L204), then the watermark just goes wrong.



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