[jira] [Assigned] (FLINK-7666) ContinuousFileReaderOperator swallows chained watermarks

["Kostas Kloudas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-7666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kostas Kloudas reassigned FLINK-7666:
-------------------------------------

    Assignee: Kostas Kloudas

> ContinuousFileReaderOperator swallows chained watermarks
> --------------------------------------------------------
>
>                 Key: FLINK-7666
>                 URL: https://issues.apache.org/jira/browse/FLINK-7666
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming Connectors
>    Affects Versions: 1.3.2
>            Reporter: Ufuk Celebi
>            Assignee: Kostas Kloudas
>            Priority: Blocker
>             Fix For: 1.4.0
>
>
> I use event time and read from a (finite) file. I assign watermarks right after the {{ContinuousFileReaderOperator}} with parallelism 1.
> {code}
> env
>   .readFile(new TextInputFormat(...), ...)
>   .setParallelism(1)
>   .assignTimestampsAndWatermarks(...)
>   .setParallelism(1)
>   .map()...
> {code}
> The watermarks I assign never progress through the pipeline.
> I can work around this by inserting a {{shuffle()}} after the file reader or starting a new chain at the assigner:
> {code}
> env
>   .readFile(new TextInputFormat(...), ...)
>   .setParallelism(1)
>   .shuffle() 
>   .assignTimestampsAndWatermarks(...)
>   .setParallelism(1)
>   .map()...
> {code}



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