Github user tzulitai commented on a diff in the pull request:
https://github.com/apache/flink/pull/3278#discussion_r100482362
--- Diff:
flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducerBaseTest.java
---
@@ -293,6 +293,61 @@ public void run() {
testHarness.close();
}
+ /**
+ * This test is meant to assure that testAtLeastOnceProducer is valid
by testing that if flushing is disabled,
+ * the snapshot method does indeed finishes without waiting for pending
records;
+ * we set a timeout because the test will not finish if the logic is
broken
+ */
+ @Test(timeout=5000)
+ public void testDoesNotWaitForPendingRecordsIfFlushingDisabled() throws
Throwable {
+ final OneShotLatch inputLatch = new OneShotLatch();
+
+ final DummyFlinkKafkaProducer<String> producer = new
DummyFlinkKafkaProducer<>(
--- End diff --
Turns out that we must have an extension of `KafkaProducer` provided to
`FlinkKafkaProducerBase`. The reason is that the producer base requires
implementing an abstract `flush` method, which doesn't exist on the
`KafkaProducer`'s interface. So it'll be more straightforward to extend
`KafkaProducer` and implement a `flush` method ourselves, and let
`FlinkKafkaProducerBase` call that.
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