lianetm commented on code in PR #14386:
URL: https://github.com/apache/kafka/pull/14386#discussion_r1327372398
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/TopicMetadataRequestManager.java:
##########
@@ -141,35 +142,57 @@ private Optional<NetworkClientDelegate.UnsentRequest>
send(final long currentTim
final MetadataRequest.Builder request;
request = topic.map(t -> new
MetadataRequest.Builder(Collections.singletonList(t), allowAutoTopicCreation))
- .orElseGet(MetadataRequest.Builder::allTopics);
-
- final NetworkClientDelegate.UnsentRequest unsent = new
NetworkClientDelegate.UnsentRequest(
- request,
- Optional.empty(),
- (response, exception) -> {
- if (exception != null) {
- this.future.completeExceptionally(new
KafkaException(exception));
- inflightRequests.remove(topic);
- return;
- }
-
- try {
- Map<String, List<PartitionInfo>> res =
handleTopicMetadataResponse((MetadataResponse) response.responseBody());
- future.complete(res);
- inflightRequests.remove(topic);
- } catch (RetriableException e) {
- if (e instanceof TimeoutException) {
- inflightRequests.remove(topic);
- }
- this.onFailedAttempt(currentTimeMs);
- } catch (Exception t) {
- this.future.completeExceptionally(t);
- inflightRequests.remove(topic);
- }
- });
+ .orElseGet(MetadataRequest.Builder::allTopics);
+
+ final NetworkClientDelegate.UnsentRequest unsent =
createUnsentRequest(request);
return Optional.of(unsent);
}
+ private NetworkClientDelegate.UnsentRequest createUnsentRequest(
+ final MetadataRequest.Builder request) {
+ return new NetworkClientDelegate.UnsentRequest(
+ request,
+ Optional.empty(),
+ this::processResponseOrException
+ );
+ }
+
+ private void processResponseOrException(final ClientResponse response,
+ final Throwable exception) {
+ long responseTimeMs = System.currentTimeMillis();
+ if (exception != null) {
+ handleException(exception, responseTimeMs);
+ return;
+ }
+ handleResponse(response, responseTimeMs);
Review Comment:
It seems that the exception handling logic here ends up in 2 places. Apart
from the initial `handleException`, this `handleResponse` could be as well end
up handling exceptions, in a very similar way (catch block on `handleResponse`
vs the `handleException`). If we prefer to keep them separated because of the
Timeout, which seems to be the case that makes them different, it would be
helpful maybe to add a comment to describe that
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