kirktrue commented on code in PR #15742:
URL: https://github.com/apache/kafka/pull/15742#discussion_r1569217494
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
##########
@@ -228,13 +228,16 @@ private void process(final ErrorEvent event) {
}
private void process(final
ConsumerRebalanceListenerCallbackNeededEvent event) {
- ApplicationEvent invokedEvent = invokeRebalanceCallbacks(
+ ConsumerRebalanceListenerCallbackCompletedEvent invokedEvent =
invokeRebalanceCallbacks(
rebalanceListenerInvoker,
event.methodName(),
event.partitions(),
event.future()
);
applicationEventHandler.add(invokedEvent);
+ if (invokedEvent.error().isPresent()) {
+ throw invokedEvent.error().get();
Review Comment:
`ConsumerRebalanceListenerCallbackNeededEvent` handles 'assign', 'revoke',
and 'lose' callbacks. It was my understanding—I could be wrong—that we wanted
to _wait_ to throw the exception after the reconciliation was fully processed.
That is, not necessarily on the first callback 🤔
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
##########
@@ -228,13 +228,16 @@ private void process(final ErrorEvent event) {
}
private void process(final
ConsumerRebalanceListenerCallbackNeededEvent event) {
- ApplicationEvent invokedEvent = invokeRebalanceCallbacks(
+ ConsumerRebalanceListenerCallbackCompletedEvent invokedEvent =
invokeRebalanceCallbacks(
rebalanceListenerInvoker,
event.methodName(),
event.partitions(),
event.future()
);
applicationEventHandler.add(invokedEvent);
+ if (invokedEvent.error().isPresent()) {
+ throw invokedEvent.error().get();
Review Comment:
However, this implementation has the interesting property that it will both
throw the exception _and_ continue processing. It seems like this could
potentially yield **two** exceptions, if, say, both the `onPartitionsRevoked()`
_and_ `onPartitionsAssigned()` threw exceptions. Is that the intent?
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