jsancio commented on code in PR #22678:
URL: https://github.com/apache/kafka/pull/22678#discussion_r3603390923
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raft/src/test/java/org/apache/kafka/raft/internals/KRaftControlRecordStateMachineTest.java:
##########
@@ -461,4 +466,80 @@ void testTrimPrefixTo() {
assertEquals(Optional.of(voterSet),
partitionState.voterSetAtOffset(voterSetOffset));
assertEquals(4, getNumberOfVoters(metrics).metricValue());
}
+
+ @Test
+ void testBufferSupplierCreatedAndClosedOnLogRead() {
+ Metrics metrics = new Metrics();
+ KafkaRaftMetrics raftMetrics = new KafkaRaftMetrics(metrics, "raft");
+ ExternalKRaftMetrics externalMetrics =
Mockito.mock(ExternalKRaftMetrics.class);
+ MockLog log = buildLog();
+ VoterSet staticVoterSet =
VoterSetTest.voterSet(VoterSetTest.voterMap(IntStream.of(1, 2, 3), true));
+ int epoch = 1;
+
+ KRaftControlRecordStateMachine partitionState =
buildPartitionListener(log, staticVoterSet, raftMetrics, externalMetrics);
+
+ // Append a control record so that the log has something to read.
+ VoterSet voterSet =
VoterSetTest.voterSet(VoterSetTest.voterMap(IntStream.of(4, 5, 6), true));
+ log.appendAsLeader(
+ MemoryRecords.withVotersRecord(
+ log.endOffset().offset(),
+ 0,
+ epoch,
+ BufferSupplier.NO_CACHING.get(300),
+ voterSet.toVotersRecord((short) 0)
+ ),
+ epoch
+ );
+
+ BufferSupplier supplier = spy(new
BufferSupplier.GrowableBufferSupplier());
+ try (MockedStatic<BufferSupplier> bufferSupplierMock =
mockStatic(BufferSupplier.class)) {
Review Comment:
Okay but ideally we should have injected a BufferSupplier factory and not
assumed that the internal implementation uses `BufferSupplier.create()`. If we
ever change the implementation we would have to change these tests.
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