Class not found: com.app.handler.AsynchronousLambdaHandler: java.lang.ClassNotFoundException, Current classpath: file:/var/task/

huangapple
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英文:

Class not found: com.app.handler.AsynchronousLambdaHandler: java.lang.ClassNotFoundException, Current classpath: file:/var/task/

问题

我已经开发了一个Spring Boot REST API，并尝试使用Serverless框架将其部署为API Gateway上的Lambda，但遇到了以下错误：

  1. 找不到类：com.app.handler.AsynchronousLambdaHandler：java.lang.ClassNotFoundException
  2. java.lang.ClassNotFoundException：com.app.handler.AsynchronousLambdaHandler。当前类路径：file:/var/task/

我正在使用Spring Boot版本2.7.10，Java版本11，Maven作为构建工具，以及Serverless作为部署工具将应用程序部署到AWS中。

处理程序类位于BOOT-INF/classes/com/app/handler/AsynchronousLambdaHandler.class，在将应用程序打包为.jar文件后可用。

serverless.yml 文件如下：

  1. service: integration-service
  3. provider:
  4.     name: aws
  5.     region: us-east-1
  6.     stage: ${opt:stage, 'dev'}
  8. functions:
  9.     "integration-service":
  10.         handler: com.app.handler.AsynchronousLambdaHandler::handleRequest
  11.         name: ${opt:stage, 'dev'}-integration-service
  12.         runtime: java11
  13.         memorySize: 512
  14.         events:
  15.             -   http: ANY /{proxy+}

pom.xml 文件如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3. 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4. 	<modelVersion>4.0.0</modelVersion>
  5. 	<parent>
  6. 		<groupId>org.springframework.boot</groupId>
  7. 		<artifactId>spring-boot-starter-parent</artifactId>
  8. 		<version>2.7.10</version>
  9. 		<relativePath/> <!-- lookup parent from repository -->
  10. 	</parent>
  11. 	<groupId>com.app</groupId>
  12. 	<artifactId>integration-service</artifactId>
  13. 	<version>1.0.0</version>
  14. 	<name>integration-service</name>
  15. 	<description>Integration Service</description>
  16. 	<properties>
  17. 		<java.version>11</java.version>
  18. 	</properties>
  19. 	<dependencies>
  20. 		<dependency>
  21. 			<groupId>org.springframework.boot</groupId>
  22. 			<artifactId>spring-boot-starter-web</artifactId>
  23. 		</dependency>
  24. 		<dependency>
  25. 			<groupId>org.springframework.boot</groupId>
  26. 			<artifactId>spring-boot-starter-data-jpa</artifactId>
  27. 		</dependency>
  28. 		<dependency>
  29. 			<groupId>com.amazonaws.serverless</groupId>
  30. 			<artifactId>aws-serverless-java-container-springboot2</artifactId>
  31. 			<version>1.9.2</version>
  32. 		</dependency>
  33. 	</dependencies>
  34. 	<build>
  35. 		<plugins>
  36. 			<plugin>
  37. 				<groupId>org.springframework.boot</groupId>
  38. 				<artifactId>spring-boot-maven-plugin</artifactId>
  39. 				<configuration>
  40. 					<finalName>${project.artifactId}</finalName>
  41. 				</configuration>
  42. 			</plugin>
  43. 		</plugins>
  44. 	</build>
  45. </project>

AsynchronousLambdaHandler.java 文件如下：

  1. package com.app.handler;
  3. import com.amazonaws.serverless.exceptions.ContainerInitializationException;
  4. import com.amazonaws.serverless.proxy.model.*;
  5. import com.amazonaws.serverless.proxy.spring.*;
  6. import com.amazonaws.services.lambda.runtime.*;
  7. import com.app.IntegrationServiceApplication;
  9. public class AsynchronousLambdaHandler implements RequestHandler<AwsProxyRequest, AwsProxyResponse> {
  10. 	private SpringBootLambdaContainerHandler<AwsProxyRequest, AwsProxyResponse> handler;
  12. 	public AsynchronousLambdaHandler() throws ContainerInitializationException {
  13. 		handler = (SpringBootLambdaContainerHandler<AwsProxyRequest, AwsProxyResponse>) new SpringBootProxyHandlerBuilder()
  14. 				.springBootApplication(IntegrationServiceApplication.class)
  15. 				.asyncInit()
  16. 				.buildAndInitialize();
  17. 	}
  19. 	@Override
  20. 	public AwsProxyResponse handleRequest(AwsProxyRequest input, Context context) {
  21. 		return handler.proxy(input, context);
  22. 	}
  23. }

我也尝试了许多选项，包括这个（https://stackoverflow.com/questions/72535951/aws-lambda-function-throws-classnotfoundexception-lambdahandler-current-class），但迄今为止都没有运气。

编辑：

已更新pom.xml 以删除Maven插件，以简化问题。

pom.xml（已更新） 如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3. 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4. 	<modelVersion>4.0.0</modelVersion>
  5. 	<parent>
  6. 		<groupId>org.springframework.boot</groupId>
  7. 		<artifactId>spring-boot-starter-parent</artifactId>
  8. 		<version>2.7.10</version>
  9. 		<relativePath/> <!-- lookup parent from repository -->
  10. 	</parent>
  11. 	<groupId>com.app</groupId>
  12. 	<artifactId>integration-service</artifactId>
  13. 	<version>1.0.0</version>
  14. 	<name>integration-service</name>
  15. 	<description>Integration Service</description>
  16. 	<properties>
  17. 		<java.version>11</java.version>
  18. 	</properties>
  19. 	<dependencies>
  20. 		<dependency>
  21. 			<groupId>org.springframework.boot</groupId>
  22. 			<artifactId>spring-boot-starter-web</artifactId>
  23. 		</dependency>
  24. 		<dependency>
  25. 			<groupId>org.springframework.boot</groupId>
  26. 			<artifactId>spring-boot-starter-data-jpa</artifactId>
  27. 		</dependency>
  28. 		<dependency>
  29. 			<groupId>com.amazonaws.serverless</groupId>
  30. 			<artifactId>aws-serverless-java-container-springboot2</artifactId>
  31. 			<version>1.9.2</version>
  32. 		</dependency>
  33. 	</dependencies>
  34. 	<build>
  35. 		<finalName>${artifactId}</finalName>
  36. 	</build>
  37. </project>
英文:

I have developed a spring boot REST API, trying to deploy it using serverless framework as a Lambda on top of API Gateway, and encountered the following the error

  1. Class not found: com.app.handler.AsynchronousLambdaHandler: java.lang.ClassNotFoundException
  2. java.lang.ClassNotFoundException: com.app.handler.AsynchronousLambdaHandler. Current classpath: file:/var/task/

I am using Spring Boot version 2.7.10, java version 11, maven as a build tool, and serverless as a deployment tool to deploy the application in AWS.

The handler class is available at BOOT-INF/classes/com/app/handler/AsynchronousLambdaHandler.class post-packing the application as a .jar file.

serverless.yml

  1. service: integration-service
  3. provider:
  4.     name: aws
  5.     region: us-east-1
  6.     stage: ${opt:stage, &#39;dev&#39;}
  8. functions:
  9.     &quot;integration-service&quot;:
  10.         handler: com.app.handler.AsynchronousLambdaHandler::handleRequest
  11.         name: ${opt:stage, &#39;dev&#39;}-integration-service
  12.         runtime: java11
  13.         memorySize: 512
  14.         events:
  15.             -   http: ANY /{proxy+}

pom.xml

  1. &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
  2. &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
  3. 		 xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd&quot;&gt;
  4. 	&lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
  5. 	&lt;parent&gt;
  6. 		&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
  7. 		&lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
  8. 		&lt;version&gt;2.7.10&lt;/version&gt;
  9. 		&lt;relativePath/&gt; &lt;!-- lookup parent from repository --&gt;
  10. 	&lt;/parent&gt;
  11. 	&lt;groupId&gt;com.app&lt;/groupId&gt;
  12. 	&lt;artifactId&gt;integration-service&lt;/artifactId&gt;
  13. 	&lt;version&gt;1.0.0&lt;/version&gt;
  14. 	&lt;name&gt;integration-service&lt;/name&gt;
  15. 	&lt;description&gt;Integration Service&lt;/description&gt;
  16. 	&lt;properties&gt;
  17. 		&lt;java.version&gt;11&lt;/java.version&gt;
  18. 	&lt;/properties&gt;
  19. 	&lt;dependencies&gt;
  20. 		&lt;dependency&gt;
  21. 			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
  22. 			&lt;artifactId&gt;spring-boot-starter-web&lt;/artifactId&gt;
  23. 		&lt;/dependency&gt;
  24. 		&lt;dependency&gt;
  25. 			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
  26. 			&lt;artifactId&gt;spring-boot-starter-data-jpa&lt;/artifactId&gt;
  27. 		&lt;/dependency&gt;
  28. 		&lt;dependency&gt;
  29. 			&lt;groupId&gt;com.amazonaws.serverless&lt;/groupId&gt;
  30. 			&lt;artifactId&gt;aws-serverless-java-container-springboot2&lt;/artifactId&gt;
  31. 			&lt;version&gt;1.9.2&lt;/version&gt;
  32. 		&lt;/dependency&gt;
  33. 	&lt;/dependencies&gt;
  34. 	&lt;build&gt;
  35. 		&lt;plugins&gt;
  36. 			&lt;plugin&gt;
  37. 				&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
  38. 				&lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
  39. 				&lt;configuration&gt;
  40. 					&lt;finalName&gt;${project.artifactId}&lt;/finalName&gt;
  41. 				&lt;/configuration&gt;
  42. 			&lt;/plugin&gt;
  43. 			&lt;plugin&gt;
  44. 				&lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
  45. 				&lt;artifactId&gt;maven-shade-plugin&lt;/artifactId&gt;
  46. 				&lt;version&gt;3.2.4&lt;/version&gt;
  47. 				&lt;configuration&gt;
  48. 					&lt;createDependencyReducedPom&gt;false&lt;/createDependencyReducedPom&gt;
  49. 				&lt;/configuration&gt;
  50. 				&lt;executions&gt;
  51. 					&lt;execution&gt;
  52. 						&lt;phase&gt;package&lt;/phase&gt;
  53. 						&lt;goals&gt;
  54. 							&lt;goal&gt;shade&lt;/goal&gt;
  55. 						&lt;/goals&gt;
  56. 					&lt;/execution&gt;
  57. 				&lt;/executions&gt;
  58. 			&lt;/plugin&gt;
  59. 		&lt;/plugins&gt;
  60. 	&lt;/build&gt;
  61. &lt;/project&gt;

AsynchronousLambdaHandler.java

  1. package com.app.handler;
  3. import com.amazonaws.serverless.exceptions.ContainerInitializationException;
  4. import com.amazonaws.serverless.proxy.model.*;
  5. import com.amazonaws.serverless.proxy.spring.*;
  6. import com.amazonaws.services.lambda.runtime.*;
  7. import com.app.IntegrationServiceApplication;
  9. public class AsynchronousLambdaHandler implements RequestHandler&lt;AwsProxyRequest, AwsProxyResponse&gt; {
  10. 	private SpringBootLambdaContainerHandler&lt;AwsProxyRequest, AwsProxyResponse&gt; handler;
  12. 	public AsynchronousLambdaHandler() throws ContainerInitializationException {
  13. 		handler = (SpringBootLambdaContainerHandler&lt;AwsProxyRequest, AwsProxyResponse&gt;) new SpringBootProxyHandlerBuilder()
  14. 				.springBootApplication(IntegrationServiceApplication.class)
  15. 				.asyncInit()
  16. 				.buildAndInitialize();
  17. 	}
  19. 	@Override
  20. 	public AwsProxyResponse handleRequest(AwsProxyRequest input, Context context) {
  21. 		return handler.proxy(input, context);
  22. 	}
  23. }

I have also explored a lot of options including this one (<https://stackoverflow.com/questions/72535951/aws-lambda-function-throws-classnotfoundexception-lambdahandler-current-class>) but no luck so far.

Edit:

Updated the pom.xml to remove maven plugins to simplyfy the problem.

pom.xml (updated)

  1. &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
  2. &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
  3. 		 xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd&quot;&gt;
  4. 	&lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
  5. 	&lt;parent&gt;
  6. 		&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
  7. 		&lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
  8. 		&lt;version&gt;2.7.10&lt;/version&gt;
  9. 		&lt;relativePath/&gt; &lt;!-- lookup parent from repository --&gt;
  10. 	&lt;/parent&gt;
  11. 	&lt;groupId&gt;com.app&lt;/groupId&gt;
  12. 	&lt;artifactId&gt;integration-service&lt;/artifactId&gt;
  13. 	&lt;version&gt;1.0.0&lt;/version&gt;
  14. 	&lt;name&gt;integration-service&lt;/name&gt;
  15. 	&lt;description&gt;Integration Service&lt;/description&gt;
  16. 	&lt;properties&gt;
  17. 		&lt;java.version&gt;11&lt;/java.version&gt;
  18. 	&lt;/properties&gt;
  19. 	&lt;dependencies&gt;
  20. 		&lt;dependency&gt;
  21. 			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
  22. 			&lt;artifactId&gt;spring-boot-starter-web&lt;/artifactId&gt;
  23. 		&lt;/dependency&gt;
  24. 		&lt;dependency&gt;
  25. 			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
  26. 			&lt;artifactId&gt;spring-boot-starter-data-jpa&lt;/artifactId&gt;
  27. 		&lt;/dependency&gt;
  28. 		&lt;dependency&gt;
  29. 			&lt;groupId&gt;com.amazonaws.serverless&lt;/groupId&gt;
  30. 			&lt;artifactId&gt;aws-serverless-java-container-springboot2&lt;/artifactId&gt;
  31. 			&lt;version&gt;1.9.2&lt;/version&gt;
  32. 		&lt;/dependency&gt;
  33. 	&lt;/dependencies&gt;
  34. 	&lt;build&gt;
  35. 		&lt;finalName&gt;${artifactId}&lt;/finalName&gt;
  36. 	&lt;/build&gt;
  37. &lt;/project&gt;

答案1

得分: 0

  1. 经过查看了许多博客、文档和不同的网页之后，我终于找到了解决方案。正如所有人建议的那样，在pom.xml中添加了以下代码，但大家忽略的最重要的一点是，***不要部署普通的`.jar`文件，而要部署您的`-aws.jar`文件***。

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.4.0</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
<shadedArtifactAttached>true</shadedArtifactAttached>
<shadedClassifierName>aws</shadedClassifierName>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
<exclude>org.apache.tomcat.embed:*</exclude>
</excludes>
</artifactSet>
</configuration>
</execution>
</executions>
</plugin>

  2. <details>
  3. <summary>英文:</summary>
  5. I finally found the solution after going through a lot of blogs, docs, and different web pages. As everyone is suggesting, I have added the following code in pom.xml but the most important point that folks missed highlighting is ***instead of deploying the normal `.jar` file deploy your `-aws.jar` file***.

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.4.0</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
<shadedArtifactAttached>true</shadedArtifactAttached>
<shadedClassifierName>aws</shadedClassifierName>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
<exclude>org.apache.tomcat.embed:*</exclude>
</excludes>
</artifactSet>
</configuration>
</execution>
</executions>
</plugin>

  2. </details>

huangapple
  • 本文由 发表于 2023年4月4日 15:40:34
  • 转载请务必保留本文链接：https://go.coder-hub.com/75926696.html
  • amazon-web-services
  • aws-lambda
  • java
  • serverless-framework
  • spring-boot
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