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https://issues.apache.org/jira/browse/FLINK-1763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14375076#comment-14375076
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ASF GitHub Bot commented on FLINK-1763:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/513
> Remove "cancel" from streaming SinkFunction
> -------------------------------------------
>
> Key: FLINK-1763
> URL: https://issues.apache.org/jira/browse/FLINK-1763
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Affects Versions: 0.9
> Reporter: Stephan Ewen
> Assignee: Gyula Fora
> Fix For: 0.9
>
>
> Since the streaming sink function is called individually for each record, it
> does not require a {{cancel()}} function. The system can cancel between calls
> to that function (which it cannot do for the source function).
> Removing this method removes the need to always implement the unnecessary,
> and usually empty, method.
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