Github user chtyim commented on a diff in the pull request:
https://github.com/apache/twill/pull/16#discussion_r94521515
--- Diff:
twill-core/src/main/java/org/apache/twill/kafka/client/KafkaConsumer.java ---
@@ -35,8 +35,10 @@
* Invoked when new messages is available.
* @param messages Iterator of new messages. The {@link
FetchedMessage} instance maybe reused in the Iterator
* and across different invocation.
+ * @return The offset of the message to be fetched next. Returns
{@code Long.MIN_VALUE} to keep the current offset
--- End diff --
In what case is unchange?
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