Krisztian Kasa created HIVE-25900: ------------------------------------- Summary: Materialized view registry does not clean non existing views at refresh Key: HIVE-25900 URL: https://issues.apache.org/jira/browse/HIVE-25900 Project: Hive Issue Type: Bug Components: Materialized views Reporter: Krisztian Kasa Assignee: Krisztian Kasa
CBO plans of materialized views which are enabled for query rewrite are cached in HS2 (MaterializedViewsCache, HiveMaterializedViewsRegistry) The registry is refreshed periodically from HMS: {code:java} set hive.server2.materializedviews.registry.refresh.period=1500s; {code} This functionality is required when multiple HS2 instances are used in a cluster: MV drop operation is served by one of the HS2 instances and the registry is updated at that time in that instance. However other HS2 instances still cache the non-existent view and need to be refreshed by the updater thread. Currently the updater thread adds new entries, refresh existing ones but does not remove the outdated entries. -- This message was sent by Atlassian Jira (v8.20.1#820001)