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Posted to issues@hive.apache.org by "Jason Dere (JIRA)" <ji...@apache.org> on 2018/11/01 17:51:00 UTC

[jira] [Updated] (HIVE-20834) Hive QueryResultCache entries keeping reference to SemanticAnalyzer from cached query

     [ https://issues.apache.org/jira/browse/HIVE-20834?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jason Dere updated HIVE-20834:
------------------------------
    Attachment: HIVE-20834.2.patch

> Hive QueryResultCache entries keeping reference to SemanticAnalyzer from cached query
> -------------------------------------------------------------------------------------
>
>                 Key: HIVE-20834
>                 URL: https://issues.apache.org/jira/browse/HIVE-20834
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Jason Dere
>            Assignee: Jason Dere
>            Priority: Major
>         Attachments: HIVE-20834.1.patch, HIVE-20834.2.patch, dominator_tree.png
>
>
> QueryResultCache.LookupInfo ends up keeping a reference to the SemanticAnalyzer from the cached query, for as long as the cached entry is in the cache. We should not be keeping the SemanticAnalyzer around after the query is done executing since they can hold on to quite a bit of memory.



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