[jira] [Created] (KAFKA-13241) Name resolution should be disabled during SASL authentication

[AndrewDi (Jira)]

AndrewDi created KAFKA-13241:
--------------------------------

             Summary: Name resolution should be disabled during SASL 
authentication
                 Key: KAFKA-13241
                 URL: https://issues.apache.org/jira/browse/KAFKA-13241
             Project: Kafka
          Issue Type: Bug
          Components: network
    Affects Versions: 2.8.0
         Environment: Redhat linux
            Reporter: AndrewDi


{code:java}
 LoginManager loginManager = loginManagers.get(clientSaslMechanism);
                authenticatorCreator = () -> buildClientAuthenticator(configs,
                        saslCallbackHandlers.get(clientSaslMechanism),
                        id,
                        socket.getInetAddress().getHostName(),
                        loginManager.serviceName(),
                        transportLayer,
                        subjects.get(clientSaslMechanism));{code}
When using SASL authentication, kafka will always try to do hostname resolution 
when build client authenticator, this is unnecessary, if we use ip to connect 
to kafka server, and didn't config kafka server hostname resolution, kafka 
client will suck here for about 10s, and then timeout with 
java.net.UnknownHostException but client can auth success anyway.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)