pnowojski commented on a change in pull request #7010: [FLINK-10353][kafka]
Support change of transactional semantics in Kaf…
URL: https://github.com/apache/flink/pull/7010#discussion_r231058042
##########
File path:
flink-connectors/flink-connector-kafka-0.11/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer011ITCase.java
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@@ -566,6 +568,76 @@ public void testRunOutOfProducersInThePool() throws
Exception {
deleteTestTopic(topic);
}
+ @Test
+ public void testMigrateFromAtLeastOnceToExactlyOnce() throws Exception {
+ String topic = "testMigrateFromAtLeastOnceToExactlyOnce";
+
+ OperatorSubtaskState producerSnapshot;
+ try (OneInputStreamOperatorTestHarness<Integer, Object>
testHarness = createTestHarness(topic, AT_LEAST_ONCE)) {
+ testHarness.setup();
+ testHarness.open();
+ testHarness.processElement(42, 0);
+ testHarness.snapshot(0, 1);
+ testHarness.processElement(43, 2);
+ testHarness.notifyOfCompletedCheckpoint(0);
+ producerSnapshot = testHarness.snapshot(1, 3);
+ testHarness.processElement(44, 4);
+ }
+
+ try (OneInputStreamOperatorTestHarness<Integer, Object>
testHarness = createTestHarness(topic, EXACTLY_ONCE)) {
+ testHarness.setup();
+ // restore from snapshot, all records until here should
be persisted
+ testHarness.initializeState(producerSnapshot);
+ testHarness.open();
+
+ // write and commit more records
+ testHarness.processElement(44, 7);
+ testHarness.snapshot(2, 8);
Review comment:
also extend the second try block a little bit by completing at least one
checkpoint to make sure that committing also works.
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