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https://issues.apache.org/jira/browse/HBASE-28303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wellington Chevreuil resolved HBASE-28303.
------------------------------------------
    Resolution: Fixed

Merged into master, branch-3 and branch-2.

> Interrupt cache prefetch thread when a heap usage threshold is reached
> ----------------------------------------------------------------------
>
>                 Key: HBASE-28303
>                 URL: https://issues.apache.org/jira/browse/HBASE-28303
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.6.0, 2.4.17, 3.0.0-beta-1, 4.0.0-alpha-1, 2.5.7, 2.7.0
>            Reporter: Wellington Chevreuil
>            Assignee: Wellington Chevreuil
>            Priority: Major
>             Fix For: 3.0.0, 4.0.0-alpha-1, 2.7.0, 3.0.0-beta-2
>
>
> Mostly critical when using non heap cache implementations, such as offheap or 
> file based. If the cache medium is too large and there are many blocks to be 
> cached, it may create a lot of cache index object in the RegionServer heap. 
> We should have guardrails to preventing caching from exhausting available 
> heap.



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