[jira] [Created] (HIVE-24806) Compactor: Initiator should lazy evaluate findUserToRunAs()

[Rajesh Balamohan (Jira)]

Rajesh Balamohan created HIVE-24806:
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             Summary: Compactor: Initiator should lazy evaluate 
findUserToRunAs()
                 Key: HIVE-24806
                 URL: https://issues.apache.org/jira/browse/HIVE-24806
             Project: Hive
          Issue Type: Improvement
            Reporter: Rajesh Balamohan


https://github.com/apache/hive/blob/64bb52316f19426ebea0087ee15e282cbde1d852/ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Initiator.java#L232

{noformat}
cache.putIfAbsent(fullTableName, findUserToRunAs(sd.getLocation(), t));
{noformat}

This ends up evaluating findUserToRunAs() everytime, and looks up from 
FileSystem on every call (thousands of times in large database).

This can be lazy initialized instead (e.g computeIfAbsent);



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