Java 如何在运行基于AWS Lambda的Spring云函数时解决空指针异常
我试图将一个简单的spring引导应用程序上传到AWS lambda中,但每次从lambda调用它时,我都会得到Null指针异常,下面我就发布代码 人口应用Java 如何在运行基于AWS Lambda的Spring云函数时解决空指针异常,java,amazon-web-services,spring-boot,aws-lambda,spring-cloud-function,Java,Amazon Web Services,Spring Boot,Aws Lambda,Spring Cloud Function,我试图将一个简单的spring引导应用程序上传到AWS lambda中,但每次从lambda调用它时,我都会得到Null指针异常,下面我就发布代码 人口应用 package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication p
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
弹簧靴
package com.example.demo;
import org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler;
public class SpringBootLambdaHandler extends
SpringBootRequestHandler<String,String>{
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-aws</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-adapter-aws</artifactId>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-core</artifactId>
<version>1.2.0</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.springframework.boot.experimental</groupId>
<artifactId>spring-boot-thin-layout</artifactId>
<version>1.0.7</version>
</plugin>
</plugins>
</build>
</project>
日志输出
java.lang.NullPointerException: null
at org.springframework.cloud.function.context.FunctionalSpringApplication.postProcessApplicationContext(FunctionalSpringApplication.java:102) ~[task/:na]
at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:372) ~[task/:na]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) ~[task/:na]
at org.springframework.cloud.function.adapter.aws.SpringFunctionInitializer.initialize(SpringFunctionInitializer.java:86) [task/:na]
at org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler.handleRequest(SpringBootRequestHandler.java:46) [task/:na]
at lambdainternal.EventHandlerLoader$PojoHandlerAsStreamHandler.handleRequest(EventHandlerLoader.java:178) [LambdaSandboxJava-1.0.jar:na]
at lambdainternal.EventHandlerLoader$2.call(EventHandlerLoader.java:888) [LambdaSandboxJava-1.0.jar:na]
at lambdainternal.AWSLambda.startRuntime(AWSLambda.java:293) [LambdaSandboxJava-1.0.jar:na]
at lambdainternal.AWSLambda.<clinit>(AWSLambda.java:64) [LambdaSandboxJava-1.0.jar:na]
at java.lang.Class.forName0(Native Method) [na:1.8.0_201]
at java.lang.Class.forName(Class.java:348) [na:1.8.0_201]
at lambdainternal.LambdaRTEntry.main(LambdaRTEntry.java:114) [LambdaJavaRTEntry-1.0.jar:na]
java.lang.NullPointerException: java.lang.NullPointerException
java.lang.NullPointerException
at org.springframework.cloud.function.context.FunctionalSpringApplication.postProcessApplicationContext(FunctionalSpringApplication.java:102)
at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:372)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314)
at org.springframework.cloud.function.adapter.aws.SpringFunctionInitializer.initialize(SpringFunctionInitializer.java:86)
at org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler.handleRequest(SpringBootRequestHandler.java:46)
END RequestId: cf38ac86-b6b6-4248-bb85-84326ae7ad76
REPORT RequestId: cf38ac86-b6b6-4248-bb85-84326ae7ad76 Duration:
3757.95 ms Billed Duration: 3800 ms Memory Size: 512 MB Max Memory
Used: 106 MB
java.lang.NullPointerException:null
位于org.springframework.cloud.function.context.FunctionalSpringApplication.postProcessApplicationContext(FunctionalSpringApplication.java:102)~[task/:na]
在org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:372)~[task/:na]
在org.springframework.boot.SpringApplication.run(SpringApplication.java:314)~[task/:na]
位于org.springframework.cloud.function.adapter.aws.SpringFunctionInitializer.initialize(SpringFunctionInitializer.java:86)[task/:na]
位于org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler.handleRequest(SpringBootRequestHandler.java:46)[task/:na]
在lambdainternal.EventHandlerLoader$pojohandlerastreamhandler.handleRequest(EventHandlerLoader.java:178)[LambdaSandboxJava-1.0.jar:na]
在lambdainternal.EventHandlerLoader$2.call(EventHandlerLoader.java:888)[LambdaSandboxJava-1.0.jar:na]
在lambdainternal.AWSLambda.startRuntime(AWSLambda.java:293)[LambdaSandboxJava-1.0.jar:na]
在lambdainternal.AWSLambda.(AWSLambda.java:64)[LambdaSandboxJava-1.0.jar:na]
在java.lang.Class.forName0(本机方法)[na:1.8.0_201]
在java.lang.Class.forName(Class.java:348)[na:1.8.0_201]
在lambdainternal.LambdaRTEntry.main(LambdaRTEntry.java:114)[lambdajavarentry-1.0.jar:na]
java.lang.NullPointerException:java.lang.NullPointerException
java.lang.NullPointerException
位于org.springframework.cloud.function.context.FunctionalSpringApplication.postProcessApplicationContext(FunctionalSpringApplication.java:102)
位于org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:372)
位于org.springframework.boot.SpringApplication.run(SpringApplication.java:314)
位于org.springframework.cloud.function.adapter.aws.SpringFunctionInitializer.initialize(SpringFunctionInitializer.java:86)
位于org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler.handleRequest(SpringBootRequestHandler.java:46)
结束请求ID:cf38ac86-b6b6-4248-bb85-84326ae7ad76
报告请求ID:cf38ac86-b6b6-4248-bb85-84326ae7ad76持续时间:
3757.95毫秒计费持续时间:3800毫秒内存大小:最大512 MB内存
已使用:106 MB
从下面的示例中获取参考
可以通过为您的lambda添加以下环境来解决NPE
MAIN_CLASS = com.example.demo.DemoApplication
有关更多详细信息,请参阅
附言:
我确实通过部署了您的代码,下面是serverless的配置示例供您参考
service:
name: spring-cloud-function-npe
frameworkVersion: ">=1.0.0 <2.0.0"
provider:
name: aws
runtime: java8
stage: ${opt:stage, 'dev'} # Set the default stage used. Default is dev
region: ${opt:region, 'ap-east-1'} # Overwrite the default region used. Default is ap-southeast-1
stackName: spring-cloud-function-npe-${self:provider.stage} # Use a custom name for the CloudFormation stack
apiName: spring-cloud-function-npe-${self:provider.stage} # Use a custom name for the API Gateway API
profile: ${opt:profile, 'default'} # The default profile to use with this service
memorySize: 1024 # Overwrite the default memory size. Default is 1024
timeout: 6 # The default is 6 seconds. Note: API Gateway current maximum is 30 seconds
logRetentionInDays: 14 # Set the default RetentionInDays for a CloudWatch LogGroup
deploymentPrefix: serverless # The S3 prefix under which deployed artifacts should be stored. Default is serverless
versionFunctions: true # Optional function versioning
endpointType: regional # Optional endpoint configuration for API Gateway REST API. Default is Edge.
logs:
restApi: true
package:
individually: true
functions:
springCloudFunctionDemo:
handler: com.example.demo.SpringBootLambdaHandler::handleRequest # required, handler set in AWS Lambda
name: ${self:provider.stage}-spring-cloud-function-npe # optional, Deployed Lambda name
description: spring-cloud-function-npe # optional, Description to publish to AWS
memorySize: 384 # optional, in MB, default is 1024
timeout: 100 # optional, in seconds, default is 6
reservedConcurrency: 5 # optional, reserved concurrency limit for this function. By default, AWS uses account concurrency limit
tracing: PassThrough # optional, overwrite, can be 'Active' or 'PassThrough'
environment: # Function level environment variables
FUNCTION_NAME: UpperCaseStringHandler
MAIN_CLASS: com.example.demo.DemoApplication
package:
artifact: target/demo-0.0.1-SNAPSHOT.jar
您的Java源文件中是否有任何包语句?@WillisBlackburn是的,有请某人帮助部署到lambda,然后检查差异是否有效。@Kane如果我将代码上传到git,这对理解问题是否有帮助?未定义函数:java.lang.IllegalStateException java.lang.IllegalStateException:未在org.springframework.cloud.function.adapter.aws.SpringFunctionInitializer.apply(SpringFunctionInitializer.java:134)中定义函数位于org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler.handleRequest(SpringBootRequestHandler.java:48)
java.lang.NullPointerException: null
at org.springframework.cloud.function.context.FunctionalSpringApplication.postProcessApplicationContext(FunctionalSpringApplication.java:102) ~[task/:na]
at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:372) ~[task/:na]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) ~[task/:na]
at org.springframework.cloud.function.adapter.aws.SpringFunctionInitializer.initialize(SpringFunctionInitializer.java:86) [task/:na]
at org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler.handleRequest(SpringBootRequestHandler.java:46) [task/:na]
at lambdainternal.EventHandlerLoader$PojoHandlerAsStreamHandler.handleRequest(EventHandlerLoader.java:178) [LambdaSandboxJava-1.0.jar:na]
at lambdainternal.EventHandlerLoader$2.call(EventHandlerLoader.java:888) [LambdaSandboxJava-1.0.jar:na]
at lambdainternal.AWSLambda.startRuntime(AWSLambda.java:293) [LambdaSandboxJava-1.0.jar:na]
at lambdainternal.AWSLambda.<clinit>(AWSLambda.java:64) [LambdaSandboxJava-1.0.jar:na]
at java.lang.Class.forName0(Native Method) [na:1.8.0_201]
at java.lang.Class.forName(Class.java:348) [na:1.8.0_201]
at lambdainternal.LambdaRTEntry.main(LambdaRTEntry.java:114) [LambdaJavaRTEntry-1.0.jar:na]
java.lang.NullPointerException: java.lang.NullPointerException
java.lang.NullPointerException
at org.springframework.cloud.function.context.FunctionalSpringApplication.postProcessApplicationContext(FunctionalSpringApplication.java:102)
at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:372)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314)
at org.springframework.cloud.function.adapter.aws.SpringFunctionInitializer.initialize(SpringFunctionInitializer.java:86)
at org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler.handleRequest(SpringBootRequestHandler.java:46)
END RequestId: cf38ac86-b6b6-4248-bb85-84326ae7ad76
REPORT RequestId: cf38ac86-b6b6-4248-bb85-84326ae7ad76 Duration:
3757.95 ms Billed Duration: 3800 ms Memory Size: 512 MB Max Memory
Used: 106 MB
MAIN_CLASS = com.example.demo.DemoApplication
service:
name: spring-cloud-function-npe
frameworkVersion: ">=1.0.0 <2.0.0"
provider:
name: aws
runtime: java8
stage: ${opt:stage, 'dev'} # Set the default stage used. Default is dev
region: ${opt:region, 'ap-east-1'} # Overwrite the default region used. Default is ap-southeast-1
stackName: spring-cloud-function-npe-${self:provider.stage} # Use a custom name for the CloudFormation stack
apiName: spring-cloud-function-npe-${self:provider.stage} # Use a custom name for the API Gateway API
profile: ${opt:profile, 'default'} # The default profile to use with this service
memorySize: 1024 # Overwrite the default memory size. Default is 1024
timeout: 6 # The default is 6 seconds. Note: API Gateway current maximum is 30 seconds
logRetentionInDays: 14 # Set the default RetentionInDays for a CloudWatch LogGroup
deploymentPrefix: serverless # The S3 prefix under which deployed artifacts should be stored. Default is serverless
versionFunctions: true # Optional function versioning
endpointType: regional # Optional endpoint configuration for API Gateway REST API. Default is Edge.
logs:
restApi: true
package:
individually: true
functions:
springCloudFunctionDemo:
handler: com.example.demo.SpringBootLambdaHandler::handleRequest # required, handler set in AWS Lambda
name: ${self:provider.stage}-spring-cloud-function-npe # optional, Deployed Lambda name
description: spring-cloud-function-npe # optional, Description to publish to AWS
memorySize: 384 # optional, in MB, default is 1024
timeout: 100 # optional, in seconds, default is 6
reservedConcurrency: 5 # optional, reserved concurrency limit for this function. By default, AWS uses account concurrency limit
tracing: PassThrough # optional, overwrite, can be 'Active' or 'PassThrough'
environment: # Function level environment variables
FUNCTION_NAME: UpperCaseStringHandler
MAIN_CLASS: com.example.demo.DemoApplication
package:
artifact: target/demo-0.0.1-SNAPSHOT.jar
sls deploy
sls invoke -f springCloudFunctionDemo --data "hello world"