lianetm commented on code in PR #16031:
URL: https://github.com/apache/kafka/pull/16031#discussion_r1626596195


##########
clients/src/test/java/org/apache/kafka/clients/consumer/internals/CommitRequestManagerTest.java:
##########
@@ -613,15 +614,44 @@ public void testOffsetFetchRequestErroredRequests(final 
Errors error, final bool
         }
     }
 
+    @ParameterizedTest
+    @MethodSource("offsetFetchExceptionSupplier")
+    public void testOffsetFetchRequestTimeoutRequests(final Errors error,
+                                                      final boolean 
isRetriable) {
+        CommitRequestManager commitRequestManager = create(true, 100);
+        
when(coordinatorRequestManager.coordinator()).thenReturn(Optional.of(mockedNode));
+
+        Set<TopicPartition> partitions = new HashSet<>();
+        partitions.add(new TopicPartition("t1", 0));
+        List<CompletableFuture<Map<TopicPartition, OffsetAndMetadata>>> 
futures = sendAndVerifyDuplicatedOffsetFetchRequests(
+                commitRequestManager,
+                partitions,
+                1,
+                error);
+
+        if (isRetriable) {
+            futures.forEach(f -> assertFalse(f.isDone()));
+
+            // Insert a long enough sleep to force a timeout of the operation. 
Invoke poll() again so that each
+            // OffsetFetchRequestState is evaluated via isExpired().
+            time.sleep(defaultApiTimeoutMs);
+            commitRequestManager.poll(time.milliseconds());
+            futures.forEach(f -> assertFutureThrows(f, 
TimeoutException.class));
+        } else {
+            futures.forEach(f -> assertFutureThrows(f, KafkaException.class));
+            assertEmptyPendingRequests(commitRequestManager);

Review Comment:
   I guess we should be able to assert this no matter if retriable or not (just 
because in this test we're forcing a timeout on retriables). 



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