问题描述

使用Service Bus SDK编写消费端应用时，遇见了错误信息:

SDK版本

    <dependency>       <groupId>com.azure</groupId>       <artifactId>azure-messaging-eventhubs</artifactId>       <version>5.4.0</version>     </dependency>     <dependency>       <groupId>com.azure</groupId>       <artifactId>azure-messaging-eventhubs-checkpointstore-blob</artifactId>       <version>1.14.0</version>     </dependency>     <dependency>       <groupId>com.azure</groupId>       <artifactId>azure-identity</artifactId>       <version>1.2.2</version>       <scope>compile</scope>     </dependency>

错误信息

Exception in thread "main" java.lang.NoClassDefFoundError: com/azure/core/client/traits/TokenCredentialTrait
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at com.example.App.main(App.java:86)
Caused by: java.lang.ClassNotFoundException: com.azure.core.client.traits.TokenCredentialTrait
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 13 more

以上问题，如何解答呢？

问题解答

这个错误其实非常明显，就是缺少 azure.core 依赖。 在pom.xml文件中，添加上如下依赖即可解决问题。

    <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-core</artifactId>
      <version>1.26.0</version>
    </dependency>

参考资料

TokenCredentialTrait not found even when used ： https://stackoverflow.com/questions/71617941/tokencredentialtrait-not-found-even-when-used