kirktrue commented on code in PR #19980:
URL: https://github.com/apache/kafka/pull/19980#discussion_r2320220634
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AbstractFetch.java:
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@@ -222,6 +222,10 @@ protected void handleFetchSuccess(final Node fetchTarget,
fetchBuffer.add(completedFetch);
}
+ // "Wake" the fetch buffer on any response, even if it's empty, to
allow the consumer to not block
+ // indefinitely waiting on the fetch buffer to get data.
+ fetchBuffer.wakeup();
Review Comment:
I have made the call to `FetchBuffer.wakeup()` conditional in
`handleFetchSuccess()` so that it's invoked only when there were no
`CompletedFetch`s added.
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