jsancio commented on code in PR #16626:
URL: https://github.com/apache/kafka/pull/16626#discussion_r1684684173
##########
raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java:
##########
@@ -348,22 +360,29 @@ private void onUpdateLeaderHighWatermark(
private void updateListenersProgress(long highWatermark) {
for (ListenerContext listenerContext : listenerContexts.values()) {
listenerContext.nextExpectedOffset().ifPresent(nextExpectedOffset
-> {
- // Send snapshot to the listener, if the listener is at the
beginning of the log and there is a snapshot,
- // or the listener is trying to read an offset for which there
isn't a segment in the log.
+ // Send snapshot to the listener, if there is a snapshot for
the partition,
+ // and it is a new listener or
+ // the listener is trying to read an offset for which there
isn't a segment in the log.
if (nextExpectedOffset < highWatermark &&
- ((nextExpectedOffset == 0 && latestSnapshot().isPresent())
||
- nextExpectedOffset < log.startOffset())
+ ((nextExpectedOffset ==
ListenerContext.STARTING_NEXT_OFFSET || nextExpectedOffset < log.startOffset())
+ && latestSnapshot().isPresent())
) {
- SnapshotReader<T> snapshot =
latestSnapshot().orElseThrow(() -> new IllegalStateException(
+ listenerContext.fireHandleSnapshot(latestSnapshot().get());
+ } else if (nextExpectedOffset ==
ListenerContext.STARTING_NEXT_OFFSET) {
+ // Reset the next offset to 0 since it is a new listener
context and there is no
+ // bootstraping checkpoint
+ listenerContext.resetOffsetToLogStart();
Review Comment:
Yep. Adding a log message at info since it should only happen once per
listener registration and until a snapshot is generated.
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