我试了下，把kafka安装在本地tidb集群所在的机器上就可以正常启动，安装在其他地方就会报错
[2022-06-30 14:17:37,573] WARN [SocketServer brokerId=0] Unexpected error from /cdc_ip; closing connection (org.apache.kafka.common.network.Selector)
org.apache.kafka.common.network.InvalidReceiveException: Invalid receive (size = -720899)
at org.apache.kafka.common.network.NetworkReceive.readFrom(NetworkReceive.java:103)
at org.apache.kafka.common.network.KafkaChannel.receive(KafkaChannel.java:447)
at org.apache.kafka.common.network.KafkaChannel.read(KafkaChannel.java:397)
at org.apache.kafka.common.network.Selector.attemptRead(Selector.java:678)
at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:580)
at org.apache.kafka.common.network.Selector.poll(Selector.java:485)
at kafka.network.Processor.poll(SocketServer.scala:913)
at kafka.network.Processor.run(SocketServer.scala:816)
at java.lang.Thread.run(Thread.java:748)
我试下升级集群版本看看有没有效果