[KAFKA-4883] invalid client sasl.jaas.config triggers NullPointerException

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.10.2.0
• Fix Version/s: 2.0.0
• Assignee: Manikumar
• Reporter: Xavier Léauté
• Created: 10/Mar/17 18:54
• Updated: 25/Apr/18 09:42
• Resolved: 11/Apr/18 04:21

Description

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

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

Resulting stack trace:

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

Issue Links

• links to: GitHub Pull Request #4849