[jira] [Created] (HDDS-14337) SCM does not restart if it was first deployed near the end of year

["Saketa Chalamchala (Jira)" <ji...@apache.org>]

Saketa Chalamchala created HDDS-14337:
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             Summary: SCM does not restart if it was first deployed near the end of year
                 Key: HDDS-14337
                 URL: https://issues.apache.org/jira/browse/HDDS-14337
             Project: Apache Ozone
          Issue Type: Bug
            Reporter: Saketa Chalamchala
            Assignee: Saketa Chalamchala


SCM fails to restart after it is first deployed and started near the end of the year, say on Dec 31, with the following error due to a Precondition fail that check if `localId > UniqueId.next()`

- `localId`: Uses millisSinceEpoch << Short.SIZE (shift by 16 bits)
- `UniqueId.next()`: Uses currentTimeMillis << 10 (shift by 10 bits)


Since UniqueId.next() shifts by fewer bits and includes the current time, while localId shifts by more bits but uses a future date (Jan 1st of next year), the values can be very close or even inverted, especially near year boundaries.



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