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https://issues.apache.org/jira/browse/HIVE-24806?focusedWorklogId=590163&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-590163
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ASF GitHub Bot logged work on HIVE-24806:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 28/Apr/21 06:16
Start Date: 28/Apr/21 06:16
Worklog Time Spent: 10m
Work Description: rbalamohan opened a new pull request #2229:
URL: https://github.com/apache/hive/pull/2229
https://issues.apache.org/jira/browse/HIVE-24806
### What changes were proposed in this pull request?
Compute findUserToRunAs on need basis to avoid FS lookup calls.
https://issues.apache.org/jira/browse/HIVE-24806 has more details.
### Why are the changes needed?
To reduce lookup calls in initiator.
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Test on small internal cluster.
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Issue Time Tracking
-------------------
Worklog Id: (was: 590163)
Remaining Estimate: 0h
Time Spent: 10m
> 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
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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