Authentication Error

[bj9306]

All,
seeing below exception in kafka pod lods. what is "listenerType=ZK_BROKER" here?

2021-07-01 06:22:51,870 INFO [SocketServer listenerType=ZK_BROKER, nodeId=3] Failed authentication with /10.0.8.75 (SSL handshake failed) (org.apache.kafka.common.network.Selector) [data-plane-kafka-network-thread-3-ListenerName(EXTERNAL-9093)-SSL-10]
2021-07-01 06:22:53,602 INFO [SocketServer listenerType=ZK_BROKER, nodeId=3] Failed authentication with /10.0.9.127 (SSL handshake failed) (org.apache.kafka.common.network.Selector) [data-plane-kafka-network-thread-3-ListenerName(EXTERNAL-9093)-SSL-10]
2021-07-01 06:22:54,354 INFO [SocketServer listenerType=ZK_BROKER, nodeId=3] Failed authentication with /10.0.9.24 (SSL handshake failed) (org.apache.kafka.common.network.Selector) [data-plane-kafka-network-thread-3-ListenerName(EXTERNAL-9093)-SSL-9]
2021-07-01 06:22:55,085 INFO [SocketServer listenerType=ZK_BROKER, nodeId=3] Failed authentication with /10.0.8.171 (SSL handshake failed) (org.apache.kafka.common.network.Selector) [data-plane-kafka-network-thread-3-ListenerName(EXTERNAL-9093)-SSL-10]
2021-07-01 06:22:55,766 INFO [SocketServer listenerType=ZK_BROKER, nodeId=3] Failed authentication with /10.0.8.217 (SSL handshake failed) (org.apache.kafka.common.network.Selector) [data-plane-kafka-network-thread-3-ListenerName(EXTERNAL-9093)-SSL-9]
2021-07-01 06:22:56,494 INFO [SocketServer listenerType=ZK_BROKER, nodeId=3] Failed authentication with /10.0.8.249 (SSL handshake failed) (org.apache.kafka.common.network.Selector) [data-plane-kafka-network-thread-3-ListenerName(EXTERNAL-9093)-SSL-9]
2021-07-01 06:22:57,222 INFO [SocketServer listenerType=ZK_BROKER, nodeId=3] Failed authentication with /10.0.8.44 (SSL handshake failed) (org.apache.kafka.common.network.Selector) [data-plane-kafka-network-thread-3-ListenerName(EXTERNAL-9093)-SSL-9]

[scholzj]

I don't know what it means. Maybe that your Kafka cluster is still using ZooKeeper? But the error says that you have some application with incorrectly configured TLS connecting to the listener named external on port 9093.

[bj9306]

yea, my kafka cluster still uses ZK. but is the cluster without ZK ready for production?

[scholzj]

No, it is not.