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https://issues.apache.org/jira/browse/FLINK-4422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17210762#comment-17210762
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Andrey Zagrebin commented on FLINK-4422:
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ok, it looks like we still have some currentTimeMillis usages to measure
duration. Hence, this issue stays open with lower priority.
> Convert all time interval measurements to System.nanoTime()
> -----------------------------------------------------------
>
> Key: FLINK-4422
> URL: https://issues.apache.org/jira/browse/FLINK-4422
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Coordination
> Reporter: Stephan Ewen
> Assignee: Jin Mingjian
> Priority: Minor
>
> In contrast to {{System.currentTimeMillis()}}, {{System.nanoTime()}} is
> monotonous. To measure delays and time intervals, {{System.nanoTime()}} is
> hence reliable, while {{System.currentTimeMillis()}} is not.
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