title: Apache Pulsar connection refused
body: <p>In my Pulsar consumer/producer, when trying to connect to Pulsar, I'm getting this error message:</p>
  
  <blockquote>
    <p>java.util.concurrent.CompletionException:
    org.apache.pulsar.client.api.PulsarClientException:
    java.util.concurrent.CompletionException:
    org.apache.pulsar.shade.io.netty.channel.AbstractChannel$AnnotatedConnectException:
    syscall:getsockopt(..) failed: Connection refused:
    pulsar-ms-tls.mydomain.com/10.16.60.179:6652</p>
  </blockquote>
  
  <p>What could be the issue?</p>