[jira] [Assigned] (KAFKA-7631) NullPointerException when SCRAM is allowed bu ScramLoginModule is not in broker's jaas.conf

["Attila Sasvari (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-7631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Attila Sasvari reassigned KAFKA-7631:
-------------------------------------

    Assignee: Attila Sasvari

> NullPointerException when SCRAM is allowed bu ScramLoginModule is not in broker's jaas.conf
> -------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-7631
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7631
>             Project: Kafka
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 2.0.0
>            Reporter: Andras Beni
>            Assignee: Attila Sasvari
>            Priority: Minor
>
> When user wants to use delegation tokens and lists {{SCRAM}} in {{sasl.enabled.mechanisms}}, but does not add {{ScramLoginModule}} to broker's JAAS configuration, a null pointer exception is thrown on broker side and the connection is closed.
> Meaningful error message should be logged and sent back to the client.
> {code}
> java.lang.NullPointerException
>         at org.apache.kafka.common.security.authenticator.SaslServerAuthenticator.handleSaslToken(SaslServerAuthenticator.java:376)
>         at org.apache.kafka.common.security.authenticator.SaslServerAuthenticator.authenticate(SaslServerAuthenticator.java:262)
>         at org.apache.kafka.common.network.KafkaChannel.prepare(KafkaChannel.java:127)
>         at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:489)
>         at org.apache.kafka.common.network.Selector.poll(Selector.java:427)
>         at kafka.network.Processor.poll(SocketServer.scala:679)
>         at kafka.network.Processor.run(SocketServer.scala:584)
>         at java.lang.Thread.run(Thread.java:748)
> {code}



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