title: Kafka SSL connection error
body: <p>I am getting the warning below while doing produce from client side which is connecting to server side which contains SSL based authentication:</p>
  
  <pre><code>[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)
  </code></pre>
  
  <p>So I am not able to produce any message getting below error:</p>
  
  <blockquote>
    <p>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)</p>
  </blockquote>