Github user maochf commented on a diff in the pull request: https://github.com/apache/twill/pull/16#discussion_r94556442 --- Diff: twill-core/src/main/java/org/apache/twill/internal/kafka/client/SimpleKafkaConsumer.java --- @@ -273,17 +274,19 @@ private MessageCallback wrapCallback(final MessageCallback callback, final AtomicBoolean stopped = new AtomicBoolean(); return new MessageCallback() { @Override - public void onReceived(final Iterator<FetchedMessage> messages) { + public long onReceived(final Iterator<FetchedMessage> messages) { if (stopped.get()) { - return; + return Long.MIN_VALUE; --- End diff -- If the offset is passed to `onReceived`, it seems that there's no need to return an offset? Because now the returned offset is used to set the offset outside of the `onReceived` method.
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