https://community.cloudera.com/t5/Support-Questions/getting-warning-when-running-Kafka-in-kerborized-cluster/m-p/221175#M183049 <P><A rel="user" href="https://community.cloudera.com/users/10115/sahmad43.html" nodeid="10115">@Sami Ahmad</A></P><P>Please check below URL's</P><P><A href="https://community.hortonworks.com/questions/78843/problems-with-kafka-scripts-after-enabled-kerberos.html" target="_blank">https://community.hortonworks.com/questions/78843/problems-with-kafka-scripts-after-enabled-kerberos.html</A></P><P><A href="https://community.hortonworks.com/content/supportkb/49422/running-kafka-client-bin-scripts-in-secure-envrion.html" target="_blank">https://community.hortonworks.com/content/supportkb/49422/running-kafka-client-bin-scripts-in-secure-envrion.html</A></P><P>Also check if you have a valid Kerberos ticket. If you use kinit, use this configuration.</P><PRE>KafkaClient { com.sun.security.auth.module.Krb5LoginModule required useTicketCache=true; };</PRE> If you use keytab, use this configuration:<PRE>KafkaClient { com.sun.security.auth.module.Krb5LoginModule required useKeyTab=true keyTab="/etc/security/keytabs/kafka_server.keytab" principal="kafka/kafka1.hostname.com@EXAMPLE.COM"; };</PRE> Thu, 17 Aug 2017 01:33:46 GMT nshelke 2017-08-17T01:33:46Z