OmniaGM commented on a change in pull request #11431: URL: https://github.com/apache/kafka/pull/11431#discussion_r739870251
########## File path: connect/mirror/src/main/java/org/apache/kafka/connect/mirror/MirrorMakerConfig.java ########## @@ -183,12 +187,18 @@ public MirrorClientConfig clientConfig(String cluster) { // fill in reasonable defaults props.putIfAbsent(GROUP_ID_CONFIG, sourceAndTarget.source() + "-mm2"); - props.putIfAbsent(DistributedConfig.OFFSET_STORAGE_TOPIC_CONFIG, "mm2-offsets." - + sourceAndTarget.source() + ".internal"); - props.putIfAbsent(DistributedConfig.STATUS_STORAGE_TOPIC_CONFIG, "mm2-status." - + sourceAndTarget.source() + ".internal"); - props.putIfAbsent(DistributedConfig.CONFIG_TOPIC_CONFIG, "mm2-configs." - + sourceAndTarget.source() + ".internal"); + + String separator = originalsStrings().getOrDefault(REPLICATION_POLICY_SEPARATOR, REPLICATION_POLICY_SEPARATOR_DEFAULT); + if (separator.equals("-")) { + throw new ConfigException("You should not use a single dash as a " + REPLICATION_POLICY_SEPARATOR); + } + + props.putIfAbsent(DistributedConfig.OFFSET_STORAGE_TOPIC_CONFIG, "mm2-offsets" + separator Review comment: Yes. The main problem am seeing is preventing the unintentional replication of these topics for users who either didn't set up their connect's topics or those who run standalone/dedicated cluster mode. -- 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