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https://issues.apache.org/jira/browse/HIVE-25768?focusedWorklogId=693446&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-693446
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ASF GitHub Bot logged work on HIVE-25768:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 09/Dec/21 18:09
Start Date: 09/Dec/21 18:09
Worklog Time Spent: 10m
Work Description: jfsii commented on a change in pull request #2841:
URL: https://github.com/apache/hive/pull/2841#discussion_r766036837
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/session/SessionState.java
##########
@@ -278,11 +278,6 @@
*/
private Map<URI, HadoopShims.HdfsEncryptionShim> hdfsEncryptionShims =
Maps.newHashMap();
- /**
- * Cache for Erasure Coding shims.
- */
- private Map<URI, HadoopShims.HdfsErasureCodingShim> erasureCodingShims;
Review comment:
I did not purposely remove this, I think it was due to me moving around
things. But it does seem valid to remove it ass I can not find any usage of
this anywhere.
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Issue Time Tracking
-------------------
Worklog Id: (was: 693446)
Time Spent: 0.5h (was: 20m)
> Extend query-level HMS cache lifetime beyond analysis stage
> -----------------------------------------------------------
>
> Key: HIVE-25768
> URL: https://issues.apache.org/jira/browse/HIVE-25768
> Project: Hive
> Issue Type: Improvement
> Components: HiveServer2
> Reporter: John Sherman
> Assignee: John Sherman
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> HIVE-24176 added a HMS response cache to improve compilation times when
> metadata is requested multiple times. The cache gets destroyed after
> analysis. If we extend the lifetime of the cache beyond analysis it could be
> used to reduce HMS communication for other areas such as various exec hooks
> that inspect the metadata for a query.
> The impetus that motivated this change is specifically the Atlas hook which
> generates lineage information and makes HMS calls. These calls to HMS can add
> latency to query results.
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