[jira] [Updated] (FLINK-3429) Add histogram-based timestamp/watermark extractor

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

     [ https://issues.apache.org/jira/browse/FLINK-3429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kostas Kloudas updated FLINK-3429:
----------------------------------
    Assignee:     (was: Kostas Kloudas)

> Add histogram-based timestamp/watermark extractor
> -------------------------------------------------
>
>                 Key: FLINK-3429
>                 URL: https://issues.apache.org/jira/browse/FLINK-3429
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Robert Metzger
>
> While FLINK-3428 provides a static low watermark generator, we should also provide a watermark extractor which periodically takes samples of the event-time distribution in a data stream into a histogram.
> From that histogram, users can specify that watermarks should cover a certain percentile of the data.
> For example a user might want watermarks to rise when 90% of the events have been seen. With the periodic update of the histogram, the extractor can react to network latencies and other issues causing late, out-of-order arrivals.



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