添加Micronaut Serde后AWS Lambda启动失败，提示无Bean内省

问题描述 #

使用Micronaut 3.9.4版本，已添加micronaut-serde-jackson依赖及对应注解处理器，以io.micronaut.function.aws.runtime.MicronautLambdaRuntime为启动类，执行以下命令打包AWS Lambda Native Image时：

mvn clean package -U -Dpackaging=docker-native -D"exec.mainClass"="io.micronaut.function.aws.runtime.MicronautLambdaRuntime" -D"micronaut.runtime"="lambda" -Pgraalvm -DskipTests

出现错误：

Request loop failed with: Error decoding HTTP response body: No bean introspection available for type [class com.amazonaws.serverless.proxy.model.AwsProxyRequest]. Ensure the class is annotated with io.micronaut.core.annotation.Introspected

解决方案 #

AwsProxyRequest是AWS Serverless Java Container库中的第三方类，无法直接添加@Introspected注解，需通过配置让Micronaut为该类生成Bean Introspection：

1. 添加Introspection配置
   在src/main/resources/application.yml中添加配置：

   micronaut:
     introspection:
       includes:
         - com.amazonaws.serverless.proxy.model.AwsProxyRequest
         - com.amazonaws.serverless.proxy.model.AwsProxyResponse
   

   若使用application.properties，则配置为：

   micronaut.introspection.includes=com.amazonaws.serverless.proxy.model.AwsProxyRequest,com.amazonaws.serverless.proxy.model.AwsProxyResponse
   

2. 确认Serde依赖配置
   确保Maven中已正确引入micronaut-serde-jackson的依赖与注解处理器：

   <dependency>
       <groupId>io.micronaut.serde</groupId>
       <artifactId>micronaut-serde-jackson</artifactId>
       <scope>compile</scope>
   </dependency>
   <dependency>
       <groupId>io.micronaut.serde</groupId>
       <artifactId>micronaut-serde-jackson-processor</artifactId>
       <scope>annotationProcessor</scope>
   </dependency>
   

3. 重新执行打包命令
   修正原命令中的参数错误（-DskipTestsclear改为-DskipTests）后重新打包：

   mvn clean package -U -Dpackaging=docker-native -Dexec.mainClass=io.micronaut.function.aws.runtime.MicronautLambdaRuntime -Dmicronaut.runtime=lambda -Pgraalvm -DskipTests
   

内容的提问来源于stack exchange，提问作者Prashant Gupta