Github user chtyim commented on a diff in the pull request:
https://github.com/apache/twill/pull/16#discussion_r95203552
--- Diff:
twill-core/src/main/java/org/apache/twill/kafka/client/KafkaConsumer.java ---
@@ -33,14 +33,16 @@
/**
* Invoked when new messages is available.
+ * @param startOffset Offset of the first {@link FetchedMessage} in
the iterator of new messages.
--- End diff --
I think the `FetchedMessage` doesn't carry the "current" offset, but the
next message offset, right? Meaning one can not keep consuming the same message
(e.g. there is some failure that it needs to retry on the same message).
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