Aleksandr Savonin created FLINK-40703:
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Summary: Improve correctness coverage: Add ITCase for recovery
from a checkpoint whose pooled transactional id was reused by a later checkpoint
Key: FLINK-40703
URL: https://issues.apache.org/jira/browse/FLINK-40703
Project: Flink
Issue Type: Improvement
Components: Connectors / Kafka
Reporter: Aleksandr Savonin
Motivation: improve end-to-end correctness coverage of the exactly-once sink.
The POOLING recovery path is covered at writer level
(ExactlyOnceKafkaWriterITCase) and unit level (KafkaCommitterTest,
TransactionAbortStrategyImplTest, ProducerPoolImplITCase), but no test runs the
real committer, the backchannel and a MiniCluster restore together.
The KafkaSinkITCase recovery tests fail their jobs at checkpoint 2, so no third
checkpoint ever reuses an id.
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