Kafka SSL connection error

Question

I am getting the warning below while doing produce from client side which is connecting to server side which contains SSL based authentication:

[2016-03-10 07:09:13,018] WARN The configuration ssl.keystore.location = /etc/pki/tls/certs/keystore-hpfs.jks was supplied but isn't a known config. (org.apache.kafka.clients.producer.ProducerConfig)
[2016-03-10 07:09:13,019] WARN The configuration ssl.keystore.password = 1qazxsw2 was supplied but isn't a known config. (org.apache.kafka.clients.producer.ProducerConfig)
[2016-03-10 07:09:13,019] WARN The configuration ssl.key.password = 1qazxsw2 was supplied but isn't a known config. (org.apache.kafka.clients.producer.ProducerConfig)
[2016-03-10 07:09:13,019] WARN The configuration ssl.truststore.type = JKS was supplied but isn't a known config. (org.apache.kafka.clients.producer.ProducerConfig)
[2016-03-10 07:09:13,019] WARN The configuration ecurity.protocol = SSL was supplied but isn't a known config. (org.apache.kafka.clients.producer.ProducerConfig)
[2016-03-10 07:09:13,019] WARN The configuration ssl.keystore.type = JKS was supplied but isn't a known config. (org.apache.kafka.clients.producer.ProducerConfig)
[2016-03-10 07:09:13,019] WARN The configuration ssl.enabled.protocols = TLSv1.2,TLSv1.1,TLSv1 was supplied but isn't a known config. (org.apache.kafka.clients.producer.ProducerConfig)

So I am not able to produce any message getting below error:

ERROR Error when sending message to topic test with key: null, value: 2 bytes with error: Failed to update metadata after 60000 ms. (org.apache.kafka.clients.producer.internals.ErrorLoggingCallback)

Answer 1

I had this very same issue for the producer while kafka logged SSL Handshake error. Turned out I forgot to add security.protocol=SSL to my producer properties.