josefk31 commented on code in PR #21028:
URL: https://github.com/apache/kafka/pull/21028#discussion_r2732984948
##########
raft/src/test/java/org/apache/kafka/raft/internals/KafkaRaftLogTest.java:
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@@ -1083,6 +1087,74 @@ public void testSegmentsLessThanLatestSnapshot() throws
IOException {
);
}
+ @Test
+ public void testReadRespectsDefaultInternalMaxFetchSize() throws
IOException {
+ int defaultMaxToReadBytes = 1;
+ MetadataLogConfig config = createMetadataLogConfig(
+ 10240,
+ 10 * 1000,
+ 10240,
+ 60 * 1000,
+ 128,
+ defaultMaxToReadBytes
+ );
+ KafkaRaftLog log = buildMetadataLog(tempDir, mockTime, config);
+ // Append twice to ensure we have 2 batches.
+ append(log, 2, 1);
+ append(log, 1, 1);
+
+ LogFetchInfo info = log.read(0, Isolation.UNCOMMITTED);
+
+ // There are 2 batches. The 1st has 2 records and will be larger than
1 Byte in size.
+ // read implementation will return at least 1 batch.
+ assertRecordBatches(info, 2, 2);
+ }
+
+ @ParameterizedTest
+ @ValueSource(ints = {1, 2, 3})
+ public void testReadRespectsMaxSizeInBytes(int expectedBatches) throws
IOException {
+ // 5 records are written in batches of 101 bytes each (at time of
writing).
+ int magicMaxBatchSizeBytes = 101;
+ MetadataLogConfig config = createMetadataLogConfig(
+ 10240,
+ 10 * 1000,
+ 10240,
+ 60 * 1000,
+ magicMaxBatchSizeBytes,
+ 1
+ );
+ KafkaRaftLog log = buildMetadataLog(tempDir, mockTime, config);
+ int recordsPerBatch = 5;
+ append(log, recordsPerBatch, 1);
+ append(log, recordsPerBatch, 1);
+ append(log, recordsPerBatch, 1);
+ append(log, recordsPerBatch, 1);
+
+ LogFetchInfo info = log.read(0,
+ Isolation.UNCOMMITTED,
+ magicMaxBatchSizeBytes * expectedBatches);
+ assertRecordBatches(info, recordsPerBatch * expectedBatches,
recordsPerBatch);
+
+ }
+
+ private static void assertRecordBatches(LogFetchInfo info, int
numberExpected, int recordsPerBatch) {
+ // Asserts that we have exactly B * R records. Further there must be B
batches of SimpleRecords each with a value of
Review Comment:
Yes! That's correct. So the test cases generate and then assert that equally
sized batches are written.
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