apoorvmittal10 commented on code in PR #17322:
URL: https://github.com/apache/kafka/pull/17322#discussion_r1805427341
##########
core/src/main/java/kafka/server/share/SharePartition.java:
##########
@@ -1058,36 +1084,57 @@ private void
maybeCompleteInitialization(CompletableFuture<Void> future) {
private AcquiredRecords acquireNewBatchRecords(
String memberId,
+ Iterable<? extends RecordBatch> batches,
long firstOffset,
- long lastOffset
+ long lastOffset,
+ int maxFetchRecords
) {
lock.writeLock().lock();
try {
+ // If same batch is fetched and previous batch is removed from the
cache then we need to
+ // update the batch first offset to endOffset, only if enfOffset
is passed the firstOffset.
+ // For an initial start of the share fetch from a topic partition
the endOffset will be initialized
+ // to 0 but firstOffset can be higher than 0.
+ long firstAcquiredOffset = firstOffset;
+ if (cachedState.isEmpty() && endOffset > firstAcquiredOffset) {
+ firstAcquiredOffset = endOffset;
+ }
+
+ // Check how many messages can be acquired from the batch.
+ long lastAcquiredOffset = lastOffset;
+ if (maxFetchRecords < lastAcquiredOffset - firstAcquiredOffset +
1) {
+ // The max messages to acquire is less than the complete
available batches hence
+ // limit the acquired records. The last offset shall be the
batches last offset
+ // which falls under the max messages limit. As the max fetch
records is the soft
+ // limit, the last offset can be higher than the max messages.
+ lastAcquiredOffset =
findLastOffsetFromBatchWithRequestOffset(batches, firstAcquiredOffset +
maxFetchRecords - 1);
Review Comment:
Yeah for compacted it might be not accurate. We have one open issue to
handle and test for compacted topics. Compacted topics complete support might
be 4.1 release.
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