发生 ClassNotFoundException 异常：io.confluent.kafka.security.config.provider.SecurePassConfigProvider (kafka.server.KafkaConfig)

Question

代理启动失败，我可以看到以下错误：

INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)
ERROR ClassNotFoundException exception occurred: io.confluent.kafka.security.config.provider.SecurePassConfigProvider (kafka.server.KafkaConfig)
INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)
ERROR ClassNotFoundException exception occurred: io.confluent.kafka.security.config.provider.SecurePassConfigProvider (kafka.server.KafkaConfig)
INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)
ERROR ClassNotFoundException exception occurred: io.confluent.kafka.security.config.provider.SecurePassConfigProvider (kafka.server.KafkaConfig)
INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)
ERROR ClassNotFoundException exception occurred: io.confluent.kafka.security.config.provider.SecurePassConfigProvider (kafka.server.KafkaConfig)
INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)
INFO KafkaConfig values:
----------------------------

我对 server.properties 文件中的属性（即 ssl.truststore.password）之一进行了秘密设置，并尝试重新启动服务器并观察到上述错误。

如有任何帮助，我们将不胜感激。谢谢！！！

---server.properties---
##
ssl.truststore.password = ${securepass:/home/secret/secrets.txt:server.properties/ssl.truststore.password}

config.providers = securepass
config.providers.securepass.class = io.confluent.kafka.security.config.provider.SecurePassConfigProvider

Confluent Community version used - 5.5.2

Answer 1

Confluent Platform 5.5.2社区版没有自带class...

$ find ./confluent-5.5.2 -name 'kafka-client-plugins*.jar'

在此处下载文件并确保它位于 Kafka 代理 class路径中，例如/usr/share/java/kafka 如果直接安装到 OS，或 Confluent tarball 的 share/java/kafka 文件夹。

https://packages.confluent.io/maven/io/confluent/kafka-client-plugins/5.5.2-ce/kafka-client-plugins-5.5.2-ce.jar

通过

验证

$ jar -tf kafka-client-plugins-5.5.2-ce.jar| grep SecurePassConfigProvider
io/confluent/kafka/security/config/provider/SecurePassConfigProvider.class

总的来说，如果有人可以访问您的代理的文件系统，您就会遇到更大的问题，并且使用对另一个文件的直接引用来掩盖文件并不“安全”

发生 ClassNotFoundException 异常：io.confluent.kafka.security.config.provider.SecurePassConfigProvider (kafka.server.KafkaConfig)

ClassNotFoundException exception occurred: io.confluent.kafka.security.config.provider.SecurePassConfigProvider (kafka.server.KafkaConfig)

apache-kafka

apache-kafka-security

confluent-platform