jolshan commented on code in PR #16344:
URL: https://github.com/apache/kafka/pull/16344#discussion_r2518990262


##########
clients/src/main/java/org/apache/kafka/clients/producer/KafkaProducer.java:
##########
@@ -1176,18 +1177,25 @@ private ClusterAndWaitTime waitOnMetadata(String topic, 
Integer partition, long
                 metadata.awaitUpdate(version, remainingWaitMs);
             } catch (TimeoutException ex) {
                 // Rethrow with original maxWaitMs to prevent logging 
exception with remainingWaitMs
-                throw new TimeoutException(
-                        String.format("Topic %s not present in metadata after 
%d ms.",
-                                topic, maxWaitMs));
+                final String errorMessage = String.format("Topic %s not 
present in metadata after %d ms.",
+                        topic, maxWaitMs);
+                if (metadata.getError(topic) != null) {
+                    throw new TimeoutException(errorMessage, 
metadata.getError(topic).exception());
+                }
+                throw new TimeoutException(errorMessage);
             }
             cluster = metadata.fetch();
             elapsed = time.milliseconds() - nowMs;
             if (elapsed >= maxWaitMs) {
-                throw new TimeoutException(partitionsCount == null ?
+                final String errorMessage = partitionsCount == null ?
                         String.format("Topic %s not present in metadata after 
%d ms.",
                                 topic, maxWaitMs) :
                         String.format("Partition %d of topic %s with partition 
count %d is not present in metadata after %d ms.",
-                                partition, topic, partitionsCount, maxWaitMs));
+                                partition, topic, partitionsCount, maxWaitMs);
+                if (metadata.getError(topic) != null && 
metadata.getError(topic).exception() instanceof RetriableException) {

Review Comment:
   Just to make sure I understand correctly--you are asking why we aren't 
including the throwable for non-retriable exceptions? 
   
   My understanding -- and from the discussion above is that we want clearer 
errors when we keep retrying over and over until we timeout. I'm not sure if 
there is a case where we hit this and the error is not retriable?



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