Luke Chen created KAFKA-16209:
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Summary: fetchSnapshot might return null if topic is created
before v2.8
Key: KAFKA-16209
URL: https://issues.apache.org/jira/browse/KAFKA-16209
Project: Kafka
Issue Type: Bug
Affects Versions: 3.6.1
Reporter: Luke Chen
Remote log manager will fetch snapshot via ProducerStateManager
[here|https://github.com/apache/kafka/blob/trunk/storage/src/main/java/org/apache/kafka/storage/internals/log/ProducerStateManager.java#L608],
but the snapshot map might get nothing if the topic has no snapshot created,
ex: topics before v2.8. Need to fix it to avoid NPE.
old PR: https://github.com/apache/kafka/pull/14615/
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