thomaskwscott commented on a change in pull request #10760:
URL: https://github.com/apache/kafka/pull/10760#discussion_r657004623



##########
File path: 
clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java
##########
@@ -4298,6 +4296,39 @@ void handleFailure(Throwable throwable) {
                         }
                     }
                 }
+
+                @Override
+                boolean 
handleUnsupportedVersionException(UnsupportedVersionException exception) {
+                    if (supportsMaxTimestamp) {
+                        supportsMaxTimestamp = false;
+
+                        // fail any unsupported futures and remove partitions 
from the downgraded retry
+                        List<ListOffsetsTopic> topicsToRemove = new 
ArrayList<>();
+                        partitionsToQuery.stream().forEach(
+                            t -> {
+                                List<ListOffsetsPartition> partitionsToRemove 
= new ArrayList<>();
+                                t.partitions().stream()
+                                    .filter(p -> p.timestamp() == 
ListOffsetsRequest.MAX_TIMESTAMP)
+                                    .forEach(
+                                        p -> {
+                                            futures.get(new 
TopicPartition(t.name(), p.partitionIndex()))
+                                                .completeExceptionally(
+                                                    new 
UnsupportedVersionException(
+                                                        "Broker " + brokerId
+                                                            + " does not 
support MAX_TIMESTAMP offset spec"));
+                                            partitionsToRemove.add(p);
+
+                                        });
+                                t.partitions().removeAll(partitionsToRemove);
+                                if (t.partitions().isEmpty()) 
topicsToRemove.add(t);
+                            }
+                        );
+                        partitionsToQuery.removeAll(topicsToRemove);

Review comment:
       agreed, looks much neater.




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