brandboat commented on code in PR #21396:
URL: https://github.com/apache/kafka/pull/21396#discussion_r2777394473
##########
clients/clients-integration-tests/src/test/java/org/apache/kafka/clients/consumer/ConsumerIntegrationTest.java:
##########
@@ -335,6 +343,50 @@ public void testRackAwareAssignment(ClusterInstance
clusterInstance) throws Exec
}
}
+ @SuppressWarnings("unchecked")
+ @ClusterTest(
+ brokers = 2,
+ types = {Type.KRAFT},
+ serverProperties = {
+ @ClusterConfigProperty(key =
GroupCoordinatorConfig.OFFSETS_TOPIC_PARTITIONS_CONFIG, value = "1"),
+ @ClusterConfigProperty(key =
GroupCoordinatorConfig.GROUP_COORDINATOR_APPEND_LINGER_MS_CONFIG, value =
"3000")
+ }
+ )
+ public void
testSingleCoordinatorOwnershipAfterPartitionReassignment(ClusterInstance
clusterInstance) throws InterruptedException, ExecutionException,
TimeoutException {
Review Comment:
Add a bit more detail here. This line intentionally makes the test fail
before the fix: it causes the batch to linger for a long time, so it never
becomes null and triggers `freeCurrentBatch` after `unload` invoked.
```
@ClusterConfigProperty(key =
GroupCoordinatorConfig.GROUP_COORDINATOR_APPEND_LINGER_MS_CONFIG, value =
"3000")
```
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