becketqin commented on a change in pull request #10794:
[FLINK-15490][kafka][test-stability] Enable idempotence producing in …
URL: https://github.com/apache/flink/pull/10794#discussion_r364519578
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File path:
flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/testutils/DataGenerators.java
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@@ -104,6 +104,8 @@ public void cancel() {
if (secureProps != null) {
props.putAll(testServer.getSecureProperties());
}
+ // Ensure the producer enables idempotence.
+ props.putAll(testServer.getIdempotentProducerConfig());
Review comment:
Yes, you are right. The idempotence will be enabled if `transactional.id` is
set. But our KafkaITCase is using AT_LEAST_ONCE semantic without enabling
checkpoint, so by default a non-transactional producer will be instantiated,
which will remove the `transactional.id` config.
https://github.com/apache/flink/blob/bd56224c3063fd23d508a4250e5698d4840fa488/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer.java#L1155
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