I’m getting an error on my Kafka cluster in server.log.
The error is the following:
[2021-12-22 14:23:38,084] INFO [SocketServer brokerId=1] Failed authentication with /<node_ip> (SSL handshake failed) (org.apache.kafka.common.network.Selector)
This errors happens on each node, every few seconds, and on each message the IP in the message is the kafka broker IP.
I was wondering how do you debug these kind of issues ?
I’ve been TCP dumping the Kafka service port and I think (but I’m not certain) the problem is caused by a missconfiguration of Kafka (it’s not related to an external client, but Kafka itself).
I use SSL only for transport and no authorization at all.
I tried to set the log to trace but either I have failed or it didn’t show me anything new.
So what’s your secret to handle this case ? How would you go about it ?
I’m not especially looking for answers on this specific problem but more on learning how to debug this situation.