Wayland Goodliffe created KAFKA-12732: -----------------------------------------
Summary: Possible Kerberos configuration bug in mirrormaker Key: KAFKA-12732 URL: https://issues.apache.org/jira/browse/KAFKA-12732 Project: Kafka Issue Type: Bug Components: mirrormaker Affects Versions: 2.8.0, 1.0.0 Reporter: Wayland Goodliffe I'm fairly sure that I've found an obscure configuration bug with mirrormaker when using kerberos. Luckily there is an easy workaround. I have tested the old mirrormaker in kafka v1.0.0, as well as mirrormaker 2 in v2.8.0 (both legacy mode and otherwise) - so I think there's a good chance this affects all versions. The set up is as follows: * consumer and producer both use ** security.protocol=SASL_SSL ** sasl.mechanism=GSSAPI * consumer and producer are in the same realm, but have different sasl.kerberos.service.name ** e.g. kafka-source and kafka-target * you specify the service names via sasl.kerberos.service.name (rather than serviceName in the jaas.conf) ** either in mm2.properties source.sasl.kerberos.service.name and target.sasl.kerberos.service.name ** or for legacy mode in consumer.config and producer.config Then * mirrormaker uses the wrong service name in the second adminclient connection when trying to validate the response ticket. ** note that it reports the correct values when it logs the client config, so this is likely due to some hidden issue deeper in kerberos code. * For example, in my case with 2.8.0, it would try to validate kafka-source/target.host@REALM instead of validating kafka-target/target.host@REALM * The resultant exception was KrbException: Server not found in Kerberos database (7) - LOOKING_UP_SERVERdue to kafka-source not being defined for target.host Workaround * ensure you specify separate jaas.conf for consumer/producer via sasl.jaas.config properties (instead of via -Djava.security.auth.login.config) * Use the jaas.conf field serviceName to specify the correct values for the brokers. -- This message was sent by Atlassian Jira (v8.3.4#803005)