[jira] [Created] (KAFKA-7324) NPE due to lack of SASLExtensions in SASL/OAUTHBEARER

[Ron Dagostino (JIRA)]

Ron Dagostino created KAFKA-7324:
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             Summary: NPE due to lack of SASLExtensions in SASL/OAUTHBEARER
                 Key: KAFKA-7324
                 URL: https://issues.apache.org/jira/browse/KAFKA-7324
             Project: Kafka
          Issue Type: Bug
          Components: clients
    Affects Versions: 2.0.1
            Reporter: Ron Dagostino
            Assignee: Ron Dagostino
             Fix For: 2.0.1


When there are no SASL extensions in an OAUTHBEARER request (or the callback 
handler does not support SaslExtensionsCallback) the 
OAuthBearerSaslClient.retrieveCustomExtensions() method returns null.  This 
null value is then passed to the OAuthBearerClientInitialResponse constructor, 
and that results in an NPE:

java.lang.NullPointerException
        at 
org.apache.kafka.common.security.oauthbearer.internals.OAuthBearerClientInitialResponse.validateExtensions(OAuthBearerClientInitialResponse.java:115)
        at 
org.apache.kafka.common.security.oauthbearer.internals.OAuthBearerClientInitialResponse.<init>(OAuthBearerClientInitialResponse.java:81)
        at 
org.apache.kafka.common.security.oauthbearer.internals.OAuthBearerClientInitialResponse.<init>(OAuthBearerClientInitialResponse.java:75)
        at 
org.apache.kafka.common.security.oauthbearer.internals.OAuthBearerSaslClient.evaluateChallenge(OAuthBearerSaslClient.java:99)




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