org.apache.rocketmq rocketmq-all 4.2.1-SNAPSHOT 4.0.0 jar rocketmq-example rocketmq-example ${project.version} ${project.groupId} rocketmq-client ${project.groupId} rocketmq-srvutil ch.qos.logback logback-classic org.javassist javassist io.openmessaging openmessaging-api org.apache.rocketmq rocketmq-openmessaging 4.2.1-SNAPSHOT