[ https://issues.apache.org/jira/browse/KAFKA-12326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Randall Hauch reassigned KAFKA-12326: ------------------------------------- Assignee: Randall Hauch > MM2 fails to start to due missing required configuration "bootstrap.servers" > ---------------------------------------------------------------------------- > > Key: KAFKA-12326 > URL: https://issues.apache.org/jira/browse/KAFKA-12326 > Project: Kafka > Issue Type: Bug > Affects Versions: 2.5.2, 2.8.0, 2.7.1, 2.6.2 > Reporter: David Jacot > Assignee: Randall Hauch > Priority: Blocker > > I just tried to mirror a topic with MM2 between two clusters with a really > simple configuration. Basically, the one provided in the repo with the > correct `bootstrap.servers`. > MM2 fails with the following error: > {noformat} > [2021-02-12 17:05:50,389] ERROR [Worker clientId=connect-1, groupId=B-mm2] > Uncaught exception in herder work thread, exiting: > (org.apache.kafka.connect.runtime.distributed.DistributedHerder:324) > org.apache.kafka.common.config.ConfigException: Missing required > configuration "bootstrap.servers" which has no default value. > at > org.apache.kafka.common.config.ConfigDef.parseValue(ConfigDef.java:493) > at org.apache.kafka.common.config.ConfigDef.parse(ConfigDef.java:483) > at > org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:108) > at > org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:142) > at > org.apache.kafka.clients.admin.AdminClientConfig.<init>(AdminClientConfig.java:233) > at org.apache.kafka.clients.admin.Admin.create(Admin.java:145) > at org.apache.kafka.connect.util.TopicAdmin.<init>(TopicAdmin.java:277) > at > org.apache.kafka.connect.util.SharedTopicAdmin.createAdmin(SharedTopicAdmin.java:143) > at > java.util.concurrent.atomic.AtomicReference.updateAndGet(AtomicReference.java:179) > at > org.apache.kafka.connect.util.SharedTopicAdmin.topicAdmin(SharedTopicAdmin.java:82) > at > org.apache.kafka.connect.util.SharedTopicAdmin.get(SharedTopicAdmin.java:72) > at > org.apache.kafka.connect.util.SharedTopicAdmin.get(SharedTopicAdmin.java:44) > at > org.apache.kafka.connect.util.KafkaBasedLog.start(KafkaBasedLog.java:163) > at > org.apache.kafka.connect.storage.KafkaOffsetBackingStore.start(KafkaOffsetBackingStore.java:136) > at org.apache.kafka.connect.runtime.Worker.start(Worker.java:197) > at > org.apache.kafka.connect.runtime.AbstractHerder.startServices(AbstractHerder.java:128) > at > org.apache.kafka.connect.runtime.distributed.DistributedHerder.run(DistributedHerder.java:310) > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) > at java.util.concurrent.FutureTask.run(FutureTask.java:266) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) > {noformat} > It seems that a regression was introduced by > [https://github.com/apache/kafka/commit/982ea2f6a471c217c7400a725c9504d9d8348d02]. > MM2 starts when the commit is reverted. -- This message was sent by Atlassian Jira (v8.3.4#803005)