[
https://issues.apache.org/jira/browse/KAFKA-14864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Matthias J. Sax resolved KAFKA-14864.
-------------------------------------
Fix Version/s: 3.4.1
3.3.3
Resolution: Fixed
> Memory leak in KStreamWindowAggregate with ON_WINDOW_CLOSE emit strategy
> ------------------------------------------------------------------------
>
> Key: KAFKA-14864
> URL: https://issues.apache.org/jira/browse/KAFKA-14864
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 3.4.0, 3.3.2
> Reporter: Victoria Xia
> Assignee: Victoria Xia
> Priority: Major
> Fix For: 3.5.0, 3.4.1, 3.3.3
>
>
> The Streams DSL processor implementation for the ON_WINDOW_CLOSE emit
> strategy during KStream windowed aggregations opens a key-value iterator but
> does not call `close()` on it
> ([link|https://github.com/apache/kafka/blob/5afedd9ac37c4d740f47867cfd31eaed15dc542f/streams/src/main/java/org/apache/kafka/streams/kstream/internals/AbstractKStreamTimeWindowAggregateProcessor.java#L203]),
> despite the Javadocs for the iterator making clear that users must do so in
> order to release resources
> ([link|https://github.com/apache/kafka/blob/5afedd9ac37c4d740f47867cfd31eaed15dc542f/streams/src/main/java/org/apache/kafka/streams/state/KeyValueIterator.java#L27]).
>
> I discovered this bug while running load testing benchmarks and noticed that
> some runs were sporadically hitting OOMs, so it is definitely possible to hit
> this in practice.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
