[FLINK-10990] Enforce minimum timespan in MeterView

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.5.5, 1.6.2, 1.7.0
• Fix Version/s: 1.5.6, 1.6.3, 1.7.0
• Component/s: Runtime / Metrics
• Labels: pull-request-available
• Assignee: WenJun Min
• Reporter: WenJun Min
• Created: 22/Nov/18 16:55
• Updated: 27/Nov/18 16:09
• Resolved: 27/Nov/18 16:09

Description

In the metric tool MeterView. If user use the meterview with the timespan smaller than UPDATE_INTERVAL_SECONDS = 5 , the getRate will always return 0/0 = NAN. And this is not friendly , I think we should pre-check it.

Issue Links

• links to: GitHub Pull Request #7165