【异常】AbstractMethodError: Receiver class com.alibaba.cloud.ai.dashscope.metadata.DashScopeAiUsage

一、报错内容

2025-03-28 16:32:42.962 [xxx-llm] [ForkJoinPool.commonPool-worker-1] WARN reactor.core.Exceptions - throwIfFatal detected a jvm fatal exception, which is thrown and logged below:
java.lang.AbstractMethodError: Receiver class com.alibaba.cloud.ai.dashscope.metadata.DashScopeAiUsage does not define or inherit an implementation of the resolved method ‘abstract java.lang.Long getPromptTokens()’ of interface org.springframework.ai.chat.metadata.Usage.

二、报错说明

该问题是由 接口与实现类版本不兼容 导致的。

1. 错误本质
   错误信息明确指出 DashScopeAiUsage 类未实现接口 org.springframework.ai .chat.metadata.Usage 中的抽象方法 getPromptTokens()。这表明：

   • 接口