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https://issues.apache.org/jira/browse/FLINK-4421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Metzger updated FLINK-4421:
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Component/s: (was: Core)
Runtime / Coordination
> Make clocks and time measurements monotonous
> --------------------------------------------
>
> Key: FLINK-4421
> URL: https://issues.apache.org/jira/browse/FLINK-4421
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Reporter: Stephan Ewen
> Priority: Minor
>
> Currently, many places use {{System.currentTimeMillis()}} to acquire
> timestamps or measure time intervals.
> Since this relies on the system clock, and the system clock is not
> necessarily monotonous (in the presence of clock updates), this can lead to
> negative duration and decreasing timestamps where increasing timestamps are
> expected.
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