Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/2108#discussion_r68086118
--- Diff:
flink-streaming-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducerBase.java
---
@@ -276,6 +315,38 @@ public void close() throws Exception {
checkErroneous();
}
+ // ------------------- Logic for handling checkpoint flushing
-------------------------- //
+
+ private void acknowledgeMessage() {
+ if(!flushOnCheckpoint) {
+ // the logic is disabled
+ return;
+ }
+ pendingRecords--;
--- End diff --
I think it is necessary to guard against concurrent changes from the
`invoke` method.
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