Kafka - 在 JAAS 配置 java 中找不到“KafkaClient”条目

Question

我在使用一个简单的 Kafka 消费者程序时遇到了一些麻烦：

18/06/04 18:13:49 ERROR /log/log.txt: org.apache.kafka.common.KafkaException: Failed to construct kafka consumer
org.apache.kafka.common.KafkaException: Failed to construct kafka consumer
        at org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:647)
        at org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:542)
        at org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:524)
        at com.carrefour.entequadratura.KafkaHandler.createConsumer(KafkaHandler.java:96)
        at com.carrefour.entequadratura.KafkaHandler.runConsumer(KafkaHandler.java:104)
        at com.carrefour.entequadratura.Main.main(Main.java:48)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:730)
        at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:181)
        at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:206)
        at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:121)
        at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: org.apache.kafka.common.KafkaException: java.lang.IllegalArgumentException: Could not find a 'KafkaClient' entry in the JAAS configuration. System property 'java.security.auth.login.config' is not set
        at org.apache.kafka.common.network.SaslChannelBuilder.configure(SaslChannelBuilder.java:74)
        at org.apache.kafka.common.network.ChannelBuilders.create(ChannelBuilders.java:60)
        at org.apache.kafka.clients.ClientUtils.createChannelBuilder(ClientUtils.java:79)
        at org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:577)
        ... 14 more
Caused by: java.lang.IllegalArgumentException: Could not find a 'KafkaClient' entry in the JAAS configuration. System property 'java.security.auth.login.config' is not set
        at org.apache.kafka.common.security.kerberos.Login.login(Login.java:295)
        at org.apache.kafka.common.security.kerberos.Login.<init>(Login.java:104)
        at org.apache.kafka.common.security.kerberos.LoginManager.<init>(LoginManager.java:44)
        at org.apache.kafka.common.security.kerberos.LoginManager.acquireLoginManager(LoginManager.java:85)
        at org.apache.kafka.common.network.SaslChannelBuilder.configure(SaslChannelBuilder.java:55)
        ... 17 more

这些是我的属性：

BOOTSTRAP_SERVERS=xxxxxxxxxxxxxxxxxx:6667
GROUP_ID=EnteLoader
AUTO_COMMIT=false
AUTO_COMMIT_INTERVAL=10000
SESSION_TIMEOUT=30000
MAX_POLL_RECORDS=5
KEY_DESERIALIZER=org.apache.kafka.common.serialization.StringDeserializer
VALUE_DESERIALIZER=org.apache.kafka.common.serialization.StringDeserializer
SECURITY_PROTOCOL=SASL_PLAINTEXT
SASL_MECHANISM=GSSAPI
SASL_KERBEROS_SERVICE_NAME=kafka

我读到这可能是一个与 jaas.conf 相关的可能问题，但我是 Kafka 的新手，我不知道如何找到它。

请你帮助我好吗？谢谢！

Answer 1

有两种方法可以将 jaas conf 传递给 kafka 消费者。

1. 如果您使用的 kafka-client 版本大于 0.10.2.1，您可以设置一个属性 sasl.jaas.config=org.apache.kafka.common.security.plain.PlainLoginModule required username="USERNAME" password="PASSWORD";

2. 正如您的错误消息所说，您可以设置系统属性java.security.auth.login.config，为此您需要将 jaas 配置字符串放入一个文件中，并将该路径作为上述系统属性的值。

配置文件

KafkaClient {
org.apache.kafka.common.security.plain.PlainLoginModule required
serviceName="yourServiceName"
username="userName"
password="password";
};

然后设置环境变量：

System.setProperty("java.security.auth.login.config","/path/to/jaas.conf");

我会推荐第一个选项，因为我在选择第二个选项时遇到了一些问题。