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  1. Hadoop Common
  2. HADOOP-14713

Audit for durations that should be measured via Time.monotonicNow

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    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
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      Description

      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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              • Assignee:
                chetna Chetna Chaudhari
                Reporter:
                jlowe Jason Lowe
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                • Created:
                  Updated: