XComp commented on code in PR #25679:
URL: https://github.com/apache/flink/pull/25679#discussion_r1860904735
##########
flink-runtime/src/test/java/org/apache/flink/runtime/leaderelection/DefaultLeaderElectionServiceTest.java:
##########
@@ -311,8 +312,11 @@ void testMultipleDriverCreations() throws Exception {
@Test
void testGrantCallWhileInstantiatingDriver() throws Exception {
final UUID expectedLeaderSessionID = UUID.randomUUID();
+ // leadership acquired right from the start
final TestingLeaderElectionDriver.Builder driverBuilder =
- TestingLeaderElectionDriver.newNoOpBuilder();
+ TestingLeaderElectionDriver.newBuilder(new
AtomicBoolean(true));
Review Comment:
That was an interesting one because I wondered why we didn't need to set the
leadership pre-FLINK-36451.
The reason was a bug in the
[TestingLeaderContender#grantLeadership](https://github.com/apache/flink/pull/25679/files#diff-b0f861e1a8e93374d482f4565c05430b9134f10bf691da391abef6b79b4dd015L53)
method. The old implementation confirmed the leadership and pushed a
LeaderInformation event after that call even if the confirmation failed (due to
leadership loss). The new implementation is cleaner in this regards
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