These errors on the client side usually indicate a security misconfiguration, and based on the broker log messages you sent, I would guess that you have Kerberos enabled for this cluster ("SASL handshake" suggests kerberos is expected). When anything other than PLAINTEXT (no security) is used, you will need to provide a client configuration file specifying the security properties. Since the specific values of those properties would be dependent on your environment, I'd recommend that you review steps 7 and following in the Kafka Security - Enabling Kerberos Authentication documentation. Here is a link to that section https://docs.cloudera.com/documentation/enterprise/6/6.3/topics/kafka_security.html#kafka_kerberos I hope that helps!
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