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  1. Couchbase Server
  2. MB-58035

Magma may disregard history retention time if current time < CAS of newest key

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    Description

      Magma's history retention logic subtracts current HLC time got via a callback from kv_engine with the newest timestamp in an SSTable to see if the SSTable can be retained in history. As detailed in MB-55798, there are cases where the CAS can switch to complete logical mode(XDCR) resulting in SSTable's timestamp being greater than the current time.

      Magma's code will integer underflow in these cases are disregard the time based history eviction.

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          Improvement - An improvement or enhancement to an existing feature or task. MB-55798 CDC: The history time "now" callback doesn't know the vbucket.

          • Major - Major loss of function.
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              apaar.gupta Apaar Gupta
              apaar.gupta Apaar Gupta
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