XComp commented on a change in pull request #18844:
URL: https://github.com/apache/flink/pull/18844#discussion_r810000486
##########
File path:
flink-runtime/src/test/java/org/apache/flink/runtime/leaderretrieval/ZooKeeperLeaderRetrievalConnectionHandlingTest.java
##########
@@ -291,55 +271,72 @@ private void writeLeaderInformationToZooKeeper(
@Test
public void testNewLeaderAfterReconnectTriggersListenerNotification()
throws Exception {
- final String retrievalPath =
"/testNewLeaderAfterReconnectTriggersListenerNotification";
+ testWithQueueLeaderElectionListener(
+ queueLeaderElectionListener ->
+ new ZooKeeperLeaderRetrievalDriver(
+ zooKeeperClient,
+
"/testNewLeaderAfterReconnectTriggersListenerNotification",
+ queueLeaderElectionListener,
+
ZooKeeperLeaderRetrievalDriver.LeaderInformationClearancePolicy
+ .ON_SUSPENDED_CONNECTION,
+
fatalErrorHandlerResource.getFatalErrorHandler()),
+ (leaderRetrievalDriver, queueLeaderElectionListener) -> {
+ final String leaderAddress = "foobar";
+ final UUID sessionId = UUID.randomUUID();
+ writeLeaderInformationToZooKeeper(
+
leaderRetrievalDriver.getConnectionInformationPath(),
+ leaderAddress,
+ sessionId);
+
+ // pop new leader
+ queueLeaderElectionListener.next();
+
+ testingServer.stop();
+
+ final CompletableFuture<String> connectionSuspension =
+ queueLeaderElectionListener.next();
+
+ // wait until the ZK connection is suspended
+ connectionSuspension.join();
+
+ testingServer.restart();
+
+ final String newLeaderAddress = "barfoo";
+ final UUID newSessionId = UUID.randomUUID();
+ writeLeaderInformationToZooKeeper(
+
leaderRetrievalDriver.getConnectionInformationPath(),
+ newLeaderAddress,
+ newSessionId);
+
+ // check that we find the new leader information eventually
+ CommonTestUtils.waitUntilCondition(
+ () -> {
+ final CompletableFuture<String>
afterConnectionReconnect =
+ queueLeaderElectionListener.next();
+ return
afterConnectionReconnect.get().equals(newLeaderAddress);
+ },
+ Deadline.fromNow(Duration.ofSeconds(30L)));
+ });
+ }
+
+ private void testWithQueueLeaderElectionListener(
+ FunctionWithException<
+ QueueLeaderElectionListener,
ZooKeeperLeaderRetrievalDriver, Exception>
+ driverFactoryMethod,
+ BiConsumerWithException<
+ ZooKeeperLeaderRetrievalDriver,
QueueLeaderElectionListener, Exception>
+ testCallback)
+ throws Exception {
final QueueLeaderElectionListener queueLeaderElectionListener =
Review comment:
Good point 👍
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