2023-04-20 19:11:38.187  WARN 16952 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient   : [Producer clientId=producer-1] Bootstrap broker 192.168.10.6:2181 (id: -3 rack: null) disconnected

2023-04-20 19:11:38.265  WARN 16952 --- [ntainer#0-0-C-1] org.apache.kafka.clients.NetworkClient   : [Consumer clientId=consumer-testGroup-1, groupId=testGroup] Bootstrap broker 192.168.10.6:2181 (id: -3 rack: null) disconnected

将application.yml里的

spring:
  kafka:
    #bootstrap-servers: xxx:9092,xxx:9092,xxx:9092
    bootstrap-servers: 192.168.10.3:9092,

新版本用9092，老的是2181，改过来就行了