chia7712 commented on a change in pull request #8717:
URL: https://github.com/apache/kafka/pull/8717#discussion_r429551641
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File path: core/src/main/scala/kafka/server/AdminManager.scala
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@@ -454,6 +454,9 @@ class AdminManager(val config: KafkaConfig,
private def alterTopicConfigs(resource: ConfigResource, validateOnly:
Boolean,
configProps: Properties, configEntriesMap:
Map[String, String]): (ConfigResource, ApiError) = {
val topic = resource.name
+ if (!metadataCache.contains(topic))
+ throw new UnknownTopicOrPartitionException(s"The topic '$topic' does not
exist.")
+
adminZkClient.validateTopicConfig(topic, configProps)
Review comment:
It seems not all checks in ```validateTopicConfig``` are required.
1. ```Topic.validate(topic)``` -> the topic is validated already as the
topic is created
1. ```if (!zkClient.topicExists(topic))``` -> it is replaced by ```if
(!metadataCache.contains(topic))```
1. ```LogConfig.validate(configs)``` -> this should be reserved
In short, should we remove ```adminZkClient.validateTopicConfig(topic,
configProps)``` and then add ```LogConfig.validate(configs)```?
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