m1a2st commented on code in PR #20334: URL: https://github.com/apache/kafka/pull/20334#discussion_r2288168060
########## connect/transforms/src/main/java/org/apache/kafka/connect/transforms/HeaderFrom.java: ########## @@ -61,11 +61,13 @@ public abstract class HeaderFrom<R extends ConnectRecord<R>> implements Transfor public static final ConfigDef CONFIG_DEF = new ConfigDef() .define(FIELDS_FIELD, ConfigDef.Type.LIST, - NO_DEFAULT_VALUE, new NonEmptyListValidator(), + NO_DEFAULT_VALUE, + new NonEmptyListValidator(), Review Comment: This configuration should allow duplicate values. Therefore, its default value should be set to `NO_DEFAULT_VALUE`, and its validator should be `NonEmptyListValidator()`. See the [test case](https://github.com/apache/kafka/blob/18045c6ac30921503deffbef1744bb365dc599fb/connect/transforms/src/test/java/org/apache/kafka/connect/transforms/HeaderFromTest.java#L240). -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org