[HBASE-25150] Metrics recording a time duration should use System.nanoTime()

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: metrics
• Assignee: Shanmukha Haripriya Kota
• Reporter: Nick Dimiduk
• Created: 02/Oct/20 22:07
• Updated: 20/May/21 22:36

Description

I was looking around in our table metrics and noticed that scan time is collected using EnvironmentEdgeManager.currentTime(). This isn't a stable way to measure a duration of time on the jvm. We should convert all these occurrences to use TimeUnit.NANOSECONDS.toMillis(System.nanoTime()) instead.