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https://issues.apache.org/jira/browse/KAFKA-7912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sophie Blee-Goldman reopened KAFKA-7912:
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The fix for this caused a performance regression and is being rolled back. We
should look into alternative ways to support concurrent modifications to the
underlying data structure
> In-memory key-value store does not support concurrent access
> -------------------------------------------------------------
>
> Key: KAFKA-7912
> URL: https://issues.apache.org/jira/browse/KAFKA-7912
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Sophie Blee-Goldman
> Assignee: Sophie Blee-Goldman
> Priority: Major
> Fix For: 2.3.0
>
>
> Currently, the in-memory key-value store uses a Map to store key-value pairs
> and fetches them by calling subMap and returning an iterator to this submap.
> This is unsafe as the submap is just a view of the original map and there is
> risk of concurrent access.
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