Jason Lowe created HADOOP-14713:
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Summary: Audit for durations that should be measured via
Time.monotonicNow
Key: HADOOP-14713
URL: https://issues.apache.org/jira/browse/HADOOP-14713
Project: Hadoop Common
Issue Type: Improvement
Reporter: Jason Lowe
Whenever we are measuring a time delta or duration in the same process, the
timestamps probably should be using Time.monotonicNow rather than Time.now or
System.currentTimeMillis. The latter two are directly reading the system clock
which can move faster or slower than actual time if the system is undergoing a
time adjustment (e.g.: adjtime or admin sets a new system time).
We should go through the code base and identify places where the code is using
the system clock but really should be using monotonic time.
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