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https://issues.apache.org/jira/browse/CALCITE-3149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17084990#comment-17084990
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Haisheng Yuan commented on CALCITE-3149:
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You know it is a cache, and cache can be evicted, right?
If you think this is a regression, you can log a JIRA to revert the change.
Or make the cache thread-local ever live HashMap.
> 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
> Fix For: 1.21.0
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Key and Value are pointing to the same object, even with soft value
> references, the objects in CACHE will not be garbage collected.
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