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Posted to issues@impala.apache.org by "Dimitris Tsirogiannis (JIRA)" <ji...@apache.org> on 2018/04/18 20:37:00 UTC

[jira] [Created] (IMPALA-6876) Entries in CatalogUsageMonitor are not cleared after invalidation

Dimitris Tsirogiannis created IMPALA-6876:
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             Summary: Entries in CatalogUsageMonitor are not cleared after invalidation
                 Key: IMPALA-6876
                 URL: https://issues.apache.org/jira/browse/IMPALA-6876
             Project: IMPALA
          Issue Type: Bug
          Components: Catalog
    Affects Versions: Impala 3.0, Impala 2.12.0
            Reporter: Dimitris Tsirogiannis
            Assignee: Dimitris Tsirogiannis


The CatalogUsageMonitor in the catalog maintains a small cache of references to tables that: a) are accessed frequently in the catalog and b) have the highest memory requirements. These entries are not cleared upon server or table invalidation, thus preventing the GC from collecting the memory of these tables. We should make sure that the CatalogUsageMonitor does not maintain entries of tables that have been invalidated or deleted. 



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