mingmxu opened a new pull request, #4765:
URL: https://github.com/apache/hive/pull/4765

   ### What changes were proposed in this pull request?
   In this PR, it adds a new conf `datanucleus.connectionLifetime` for 
hive-metastore, which would be helpful for users who use Postgres as the 
backend database, and connect it via PgBouncer.
   
   
   ### Why are the changes needed?
   As the issue explains in https://issues.apache.org/jira/browse/HIVE-27756, 
without it users have to set a long lifetime in pgbouncer, which impacts the 
operations on db side.
   
   ### Does this PR introduce _any_ user-facing change?
   NO, the default behavior is retained. 
   
   ### Is the change a dependency upgrade?
   NO
   
   
   ### How was this patch tested?
   test in our own production clusters
   


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