ahuang98 commented on code in PR #21053:
URL: https://github.com/apache/kafka/pull/21053#discussion_r2729772897
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metadata/src/main/java/org/apache/kafka/controller/ConfigurationControlManager.java:
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@@ -327,6 +338,13 @@ private ApiError validateAlterConfig(
Map<String, String> alteredConfigsForAlterConfigPolicyCheck = new
HashMap<>();
TimelineHashMap<String, String> existingConfigsSnapshot =
configData.get(configResource);
if (existingConfigsSnapshot != null) {
+ if (configValidator != null) {
+ for (String name : existingConfigsSnapshot.keySet()) {
+ if (!configValidator.isValidConfig(configResource.type(),
name)) {
+ existingConfigsSnapshot.remove(name);
Review Comment:
oh I see the issue... existing configs are validated not because
`ControllerConfigurationValidator#validate` enforces the same validation logic
over `oldConfigs` as `newConfigs` but because ConfigurationControlManager
passes the existingConfigs into the `newConfigs` map as well.
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