deniskuzZ commented on PR #5567:
URL: https://github.com/apache/hive/pull/5567#issuecomment-2517067831

   > > I am not sure I get this. There is already a table-level lock for atomic 
stats update and we are adding an extra re-try loop inside?
   > 
   > The existing table-level lock is an in-memory lock. That means in case you 
have multiple HMS instances and two different processes are getting requests in 
the same time, it just doesn't have any effect - as on JVM level, there is only 
one single instance.
   
   ok, in-memory lock serves diff purpose - thread safety, see HIVE-25904. 
   Descriptions says "updateTableColumnStatistics can throw 
SQLIntegrityConstraintViolationException during replication if HA is on and two 
different HMS instance gets the same call but with different engine. "
   isn't the engine part of PK? RawStore interface. methods are not retriable


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