kirktrue commented on code in PR #19609:
URL: https://github.com/apache/kafka/pull/19609#discussion_r2072104073


##########
clients/src/test/java/org/apache/kafka/clients/consumer/internals/ConsumerNetworkThreadTest.java:
##########
@@ -117,9 +116,9 @@ public void testEnsureCloseStopsRunningThread() {
     @ParameterizedTest
     @ValueSource(longs = {ConsumerNetworkThread.MAX_POLL_TIMEOUT_MS - 1, 
ConsumerNetworkThread.MAX_POLL_TIMEOUT_MS, 
ConsumerNetworkThread.MAX_POLL_TIMEOUT_MS + 1})
     public void testConsumerNetworkThreadPollTimeComputations(long 
exampleTime) {
-        List<Optional<? extends RequestManager>> list = new ArrayList<>();
-        list.add(Optional.of(coordinatorRequestManager));
-        list.add(Optional.of(heartbeatRequestManager));
+        List<RequestManager> list = new ArrayList<>();

Review Comment:
   Not easily, no. I made two different attempts (see commit history), and both 
just added a bunch of ugly code just to make this look cleaner.
   
   The problem is that the list contains both `RequestManager`s and 
`Optional<RequestManager>`s, so the type of the list would have to be defined 
as `List<Object>`. The idea of this PR is to make the `entries` list only 
include the succinct set of `RequestManager`s that are actually in use.
   
   I'm open to suggestions, though 😄



##########
clients/src/test/java/org/apache/kafka/clients/consumer/internals/ConsumerNetworkThreadTest.java:
##########
@@ -158,16 +157,16 @@ public void testStartupAndTearDown() throws 
InterruptedException {
 
     @Test
     public void testRequestsTransferFromManagersToClientOnThreadRun() {
-        List<Optional<? extends RequestManager>> list = new ArrayList<>();
-        list.add(Optional.of(coordinatorRequestManager));
-        list.add(Optional.of(heartbeatRequestManager));
-        list.add(Optional.of(offsetsRequestManager));
+        List<RequestManager> list = new ArrayList<>();

Review Comment:
   See above.



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