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https://issues.apache.org/jira/browse/CASSANDRA-18311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17698811#comment-17698811
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Jacek Lewandowski commented on CASSANDRA-18311:
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https://ci-cassandra.apache.org/view/patches/job/Cassandra-devbranch/2339/ (4.0)
> BufferPool incorrectly counts memoryInUse when putUnusedPortion is used
> -----------------------------------------------------------------------
>
> Key: CASSANDRA-18311
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18311
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Caching
> Reporter: Jaroslaw Grabowski
> Assignee: Jaroslaw Grabowski
> Priority: Normal
> Fix For: 4.0.x, 4.1.x, 5.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The counter is incorrectly decremented by the size of the unused portion of
> the provided buffer.
> It should be decremented by the number of bytes actually returned to the pool
> (that may be different than "size"). The number should be calculated as a
> difference between original and resulting buffer capacity.
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