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https://issues.apache.org/jira/browse/KAFKA-6412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16306934#comment-16306934
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Matthias J. Sax commented on KAFKA-6412:
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[~tedyu] Please open a PR on Github and we can take it from there. Thx.
> Improve synchronization in CachingKeyValueStore methods
> -------------------------------------------------------
>
> Key: KAFKA-6412
> URL: https://issues.apache.org/jira/browse/KAFKA-6412
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Ted Yu
> Attachments: k-6412.v1.txt
>
>
> Currently CachingKeyValueStore methods are synchronized at method level.
> It seems we can use read lock for getter and write lock for put / delete
> methods.
> For getInternal(), if the underlying thread is streamThread, the
> getInternal() may trigger eviction. This can be handled by obtaining write
> lock at the beginning of the method for streamThread.
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