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https://issues.apache.org/jira/browse/HIVE-29046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HIVE-29046 started by Stamatis Zampetakis.
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> Avoid unecessary perf overhead from handling deprecated properties in
> MetastoreConf
> -----------------------------------------------------------------------------------
>
> Key: HIVE-29046
> URL: https://issues.apache.org/jira/browse/HIVE-29046
> Project: Hive
> Issue Type: Improvement
> Components: Standalone Metastore
> Reporter: Stamatis Zampetakis
> Assignee: Stamatis Zampetakis
> Priority: Major
>
> Currently, on every creation of a new MetastoreConf instance we are [looping
> through ~400
> ConfVars|https://github.com/apache/hive/blob/90b48ff2fe68e14ebdd02ca718814114384f99e5/standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/conf/MetastoreConf.java#L2249]
> enumeration entries to detect and register deprecated properties.
> The deprecated properties are static and known at compile time so there is no
> reason to search and register them on every creation of a new Configuration
> instance. The current logic is resource wasteful and unnecessary. In
> addition, the presence of deprecation information inside the ConfVars
> enumeration leads to boilerplate code that is not really necessary.
> The deprecation logic can be moved in a static block and the all the code for
> the bookeeping deprecated properties in ConfVars can be dropped.
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