[GitHub] [kafka] ijuma commented on a change in pull request #8579: KAFKA-9930: Prevent ReplicaFetcherThread from throwing UnknownTopicOrPartitionException upon topic creation and deletion.

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ijuma commented on a change in pull request #8579:
URL: https://github.com/apache/kafka/pull/8579#discussion_r419038136



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File path: core/src/main/scala/kafka/server/AbstractFetcherThread.scala
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@@ -382,6 +382,11 @@ abstract class AbstractFetcherThread(name: String,
                     "that the partition is being moved")
                   partitionsWithError += topicPartition
 
+                case Errors.UNKNOWN_TOPIC_OR_PARTITION =>
+                  warn(s"Remote broker does not host the partition $topicPartition, which could indicate " +
+                    "that the partition is being created or deleted.")

Review comment:
       I think that relying on warnings in logs to detect propagation issues is difficult. We have metrics to indicate issues with failed replica fetches and such. Are those enough for these cases?




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