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https://issues.apache.org/jira/browse/KAFKA-12219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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A. Sophie Blee-Goldman updated KAFKA-12219:
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Description: With KAFKA-8802 (included in [2.4.0
release|https://downloads.apache.org/kafka/2.4.0/RELEASE_NOTES.html]),
{{ConcurrentSkipListMap}} in {{InMemoryKeyValueStore}} was reverted into
{{TreeMap}} for performance issues. However, the {{synchronized}} keyword for
{{reverseRange}}, {{reverseAll}} methods were omitted when adding the reverse
range methods in 2.7, leaving possibility of race condition. (was: With
KAFKA-8802 (included in [2.4.0
release|https://downloads.apache.org/kafka/2.4.0/RELEASE_NOTES.html]),
{{ConcurrentSkipListMap}} in {{InMemoryKeyValueStore}} was reverted into
{{TreeMap}} for performance issues. However, the {{synchronized}} keyword for
{{reverseRange}}, {{reverseAll}} methods were omitted, leaving possibility of
race condition.)
> Potential race condition in InMemoryKeyValueStore
> -------------------------------------------------
>
> Key: KAFKA-12219
> URL: https://issues.apache.org/jira/browse/KAFKA-12219
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.7.0
> Reporter: Dongjin Lee
> Assignee: Dongjin Lee
> Priority: Critical
> Fix For: 2.8.0
>
>
> With KAFKA-8802 (included in [2.4.0
> release|https://downloads.apache.org/kafka/2.4.0/RELEASE_NOTES.html]),
> {{ConcurrentSkipListMap}} in {{InMemoryKeyValueStore}} was reverted into
> {{TreeMap}} for performance issues. However, the {{synchronized}} keyword for
> {{reverseRange}}, {{reverseAll}} methods were omitted when adding the reverse
> range methods in 2.7, leaving possibility of race condition.
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