psolomin commented on issue #25975:
URL: https://github.com/apache/beam/issues/25975#issuecomment-1764127126
> Can you try setting --experiments=use_deprecated_read for KafkaIO?
Tried. And it still worked without issues - reducing Flink parallelism from
3 to 2, with 3 partitions in the source topic, did not cause records loss. This
is how I run it:
```
docker exec -u flink -it kafka-consumer-flink-jm-1 flink run \
-s file:///mnt/savepoints/savepoint-< savepoint id > \
--class com.kfk.consumer.FlinkRunnerMain --detached \
/mnt/artifacts/example-com.kfk.consumer.FlinkRunnerMain-bundled-0.1-SNAPSHOT.jar
\
--bootstrapServers=kafka:9092 --inputTopics=raw,raw2
--outputDir=/mnt/output \
--autoWatermarkInterval=10000 \
--externalizedCheckpointsEnabled=true \
--checkpointingMode=EXACTLY_ONCE \
--numConcurrentCheckpoints=1 \
--checkpointTimeoutMillis=500000 \
--checkpointingInterval=60000 \
--minPauseBetweenCheckpoints=5000 \
--stateBackend=rocksdb \
--stateBackendStoragePath=file:///tmp/flink-state \
--parallelism=2 \
--experiments=use_deprecated_read
```
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