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https://issues.apache.org/jira/browse/KAFKA-9449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Gustafson resolved KAFKA-9449.
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Fix Version/s: 2.4.1
Resolution: Fixed
> Producer's BufferPool may block the producer from closing.
> ----------------------------------------------------------
>
> Key: KAFKA-9449
> URL: https://issues.apache.org/jira/browse/KAFKA-9449
> Project: Kafka
> Issue Type: Bug
> Reporter: Brian Byrne
> Assignee: Brian Byrne
> Priority: Major
> Fix For: 2.4.1
>
>
> The producer's BufferPool may block allocations if its memory limit has hit
> capacity. If the producer is closed, it's possible for the allocation waiters
> to wait for max.block.ms if progress cannot be made, even when force-closed
> (immediate), which can cause indefinite blocking if max.block.ms is
> particularly high.
> The BufferPool should be made close-able, which should immediate wake up any
> waiters that are pending allocations and throw a "producer is closing"
> exception.
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