Stephen O'Donnell created HDDS-7692:
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Summary: Remove usage of MonotonicClock as default Clock used
Key: HDDS-7692
URL: https://issues.apache.org/jira/browse/HDDS-7692
Project: Apache Ozone
Issue Type: Bug
Reporter: Stephen O'Donnell
Similar to HDDS-7463, we are seeing that commands sent from SCM to the
datanodes are being expired when they should not be. This is because we are
getting the command deadline from MonotonicClock and then comparing that with
the current time, also gotten from MonotonicClock on the datanodes.
As we discovered in HDDS-7463, the "Time" monotonic clock uses is not system
time, but some arbitrary reference point in the JVM. We cannot use the time
from monotonic clock to compare times across JVM restarts, or in different JVMs.
For that reason, I believe it would be safer to replace any usages of Monotonic
clock with java.util.SystemClock.
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