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Posted to issues@calcite.apache.org by "Haisheng Yuan (JIRA)" <ji...@apache.org> on 2019/06/27 05:47:00 UTC

[jira] [Commented] (CALCITE-3149) CACHE in RelDataTypeFactoryImpl can't be garbage collected

    [ https://issues.apache.org/jira/browse/CALCITE-3149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16873834#comment-16873834 ] 

Haisheng Yuan commented on CALCITE-3149:
----------------------------------------

We hit the OOM issue quite frequently in case of super large expression, with tons of RelDataType objects living in CACHE.

> CACHE in RelDataTypeFactoryImpl can't be garbage collected 
> -----------------------------------------------------------
>
>                 Key: CALCITE-3149
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3149
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>            Reporter: Haisheng Yuan
>            Assignee: Haisheng Yuan
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: screenshot-1.png
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Key and Value are pointing to the same object, with soft references, the item in CACHE will not be garbage collected. And it is causing the RelDataType is not reused.
>  !screenshot-1.png! 



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