[jira] [Commented] (FLINK-9193) Deprecate non-well-defined output methods on DataStream

["Timo Walther (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-9193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16441023#comment-16441023 ] 

Timo Walther commented on FLINK-9193:
-------------------------------------

Do we really want to deprecate these useful methods? I think this will a big barrier especially for new users. Of course they have no well-defined semantics, but are useful for debugging, prototyping, and testing. Not every user needs strong consistency guarantees either.

> Deprecate non-well-defined output methods on DataStream
> -------------------------------------------------------
>
>                 Key: FLINK-9193
>                 URL: https://issues.apache.org/jira/browse/FLINK-9193
>             Project: Flink
>          Issue Type: Improvement
>          Components: DataStream API
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>            Priority: Major
>             Fix For: 1.5.0
>
>
> Some output methods on {{DataStream}} that write text to files are not safe to use in a streaming program as they have no consistency guarantees. They are:
>  - {{writeAsText()}}
>  - {{writeAsCsv()}}
>  - {{writeToSocket()}}
>  - {{writeUsingOutputFormat()}}
> Along with those we should also deprecate the {{SinkFunctions}} that they use.



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