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Guozhang Wang commented on KAFKA-12743: --------------------------------------- Yeah that's a good point. I think your workaround makes sense -- since you could just have a separate application for manual failover anyways, it should be fine then. Moving forward, we should have a better way of DR story for Kafka Streams, maybe allowing users to totally customize their changelog topics. For that reason, please keep this ticket open so that we can revisit. > [Kafka Streams] - regex name for state-store change-log topic > ------------------------------------------------------------- > > Key: KAFKA-12743 > URL: https://issues.apache.org/jira/browse/KAFKA-12743 > Project: Kafka > Issue Type: Improvement > Components: mirrormaker, streams > Affects Versions: 2.8.0 > Reporter: Sergey Zyrianov > Priority: Major > > Currently, when working with Kafka backed state stores in Kafka Streams, > these log compacted topics are given a hardcoded name : > _app_id-storename-changelog_ > {noformat} > public static String storeChangelogTopic(String applicationId, String > storeName) { > return applicationId + "-" + storeName + STATE_CHANGELOG_TOPIC_SUFFIX; > }{noformat} > > MirrorMaker2(mm2) copies these topics to remote cluster under the name > _src-cluster-alias.app_id-storename-changelog_ > > When streams app fails over to the remote cluster it has troubles to find > changelog topic of its state store since it was renamed - given source > cluster prefix by mm2. > Whats the fix should be ? instruct mm2 to keep topic name or subscribe to > regex *._app_id-storename-changelog_ topic name for the state's changelog. > > -- This message was sent by Atlassian Jira (v8.3.4#803005)