[jira] [Created] (KAFKA-4883) invalid client sasl.jaas.config triggers NullPointerException

[JIRA]

Xavier Léauté created KAFKA-4883:
------------------------------------

             Summary: invalid client sasl.jaas.config triggers 
NullPointerException
                 Key: KAFKA-4883
                 URL: https://issues.apache.org/jira/browse/KAFKA-4883
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 0.10.2.0
            Reporter: Xavier Léauté


Using an invalid sasl.jaas.config property causes a NullPointerException to be 
thrown, which makes it difficult to understand the root of the problem.

Example of an invalid config
{code}
sasl.jaas.config=KafkaClient {\n\
  org.apache.kafka.common.security.plain.PlainLoginModule required\n\
  username="xxxxx"\n\
  password="XXXX";\n\
}
{code}

Resulting stack trace:
{code}
org.apache.kafka.common.KafkaException: Failed to construct kafka producer
        at 
org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:342)
        at 
org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:166)
[...]
Caused by: org.apache.kafka.common.KafkaException: 
java.lang.NullPointerException
        at 
org.apache.kafka.common.network.SaslChannelBuilder.configure(SaslChannelBuilder.java:94)
        at 
org.apache.kafka.common.network.ChannelBuilders.create(ChannelBuilders.java:93)
        at 
org.apache.kafka.common.network.ChannelBuilders.clientChannelBuilder(ChannelBuilders.java:51)
        at 
org.apache.kafka.clients.ClientUtils.createChannelBuilder(ClientUtils.java:84)
        at 
org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:305)
        ... 41 more
Caused by: java.lang.NullPointerException
        at 
org.apache.kafka.common.security.JaasConfig.loginModuleControlFlag(JaasConfig.java:87)
        at 
org.apache.kafka.common.security.JaasConfig.parseAppConfigurationEntry(JaasConfig.java:110)
        at 
org.apache.kafka.common.security.JaasConfig.<init>(JaasConfig.java:65)
        at 
org.apache.kafka.common.security.JaasUtils.jaasConfig(JaasUtils.java:59)
        at 
org.apache.kafka.common.network.SaslChannelBuilder.configure(SaslChannelBuilder.java:85)
        ... 45 more
{code}



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