philipnee commented on code in PR #14532:
URL: https://github.com/apache/kafka/pull/14532#discussion_r1358656536
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/HeartbeatRequestManager.java:
##########
@@ -184,13 +184,11 @@ private NetworkClientDelegate.UnsentRequest
makeHeartbeatRequest() {
NetworkClientDelegate.UnsentRequest request = new
NetworkClientDelegate.UnsentRequest(
new ConsumerGroupHeartbeatRequest.Builder(data),
coordinatorRequestManager.coordinator());
- request.future().whenComplete((response, exception) -> {
+ request.handler().whenComplete((response, exception) -> {
if (response != null) {
onResponse((ConsumerGroupHeartbeatResponse)
response.responseBody(), response.receivedTimeMs());
} else {
- // TODO: Currently, we lack a good way to propage the response
time from the network client to the
- // request handler. We will need to store the response time
in the handler to make it accessible.
- onFailure(exception, time.milliseconds());
+ onFailure(exception, request.handler().completionTimeMs());
Review Comment:
I think the only time we invoke onComplete() is when a response is available
(see below). If the response is `null`, which indicates the request has not
been sent out; therefore, in the `NetworkClientDelegate`, we need to actively
fail the request on timeout.
onComplete when response is available:
```
private void completeResponses(List<ClientResponse> responses) {
for (ClientResponse response : responses) {
try {
response.onComplete();
} catch (Exception e) {
log.error("Uncaught error in request completion:", e);
}
}
}
```
We actively expires the unsent request and fail them with TimeoutException:
```
if (unsent.timer.isExpired()) {
iterator.remove();
unsent.handler.onFailure(currentTimeMs, new TimeoutException(
"Failed to send request after " +
unsent.timer.timeoutMs() + " ms."));
continue;
}
```
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