ijuma commented on a change in pull request #10584: URL: https://github.com/apache/kafka/pull/10584#discussion_r649187595
########## File path: clients/src/main/java/org/apache/kafka/common/requests/MetadataRequest.java ########## @@ -92,6 +93,15 @@ public MetadataRequest build(short version) { if (!data.allowAutoTopicCreation() && version < 4) throw new UnsupportedVersionException("MetadataRequest versions older than 4 don't support the " + "allowAutoTopicCreation field"); + if (version >= 10) { + if (data.topics() != null) { + data.topics().forEach(topic -> { + if (topic.name() == null || topic.topicId() != Uuid.ZERO_UUID) + throw new UnsupportedVersionException("MetadataRequest version " + version + + " does not support null topic names or topic IDs."); Review comment: Slight clarification: `or non-null topic IDs` -- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org