Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/4631#discussion_r137256929
--- Diff: docs/dev/connectors/kafka.md ---
@@ -475,7 +475,13 @@ are other constructor variants that allow providing
the following:
### Kafka Producers and Fault Tolerance
-With Flink's checkpointing enabled, the Flink Kafka Producer can provide
+#### Kafka 0.8
+
+Before 0.9 Kafka did not provide any mechanisms to guarantee at-least-once
or exactly-once semantics.
+
+#### Kafka 0.9 and 0.10
+
+With Flink's checkpointing enabled, the `FlinkKafkaProducer010` can provide
--- End diff --
I can fix when merging.
---
