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https://issues.apache.org/jira/browse/KAFKA-4883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16432440#comment-16432440
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ASF GitHub Bot commented on KAFKA-4883:
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omkreddy opened a new pull request #4849: KAFKA-4883: handle
NullPointerException while parsing login modue control flag
URL: https://github.com/apache/kafka/pull/4849
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> 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
> Priority: Minor
>
> 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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