Log4j2 + AWS JAVA LAMBDA + 云观察日志

Question

我在代码中使用以下配置，但未生成 cloudwatch 日志。 Log4j2.xml 存在于 main/resources 中。我正在关注 AWS 文档和一些堆栈溢出，但我没有收到它所说的日志 -

Cloudwatch 日志

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
START RequestId: e36-c827-46-93-a7 Version: $LATEST
Transforming org/apache/logging/log4j/core/lookup/JndiLookup (lambdainternal.CustomerClassLoader@433d)
2022-03-07T16:01:51.527+05:30   2022-03-07 10:31:51,526 main ERROR Error processing element Lambda ([Appenders: null]): CLASS_NOT_FOUND
2022-03-07T16:01:51.626+05:30   2022-03-07 10:31:51,626 main ERROR Unable to locate appender "Lambda" for logger config "root"

Log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration packages="com.amazonaws.services.lambda.runtime.log4j2" status="WARN">
    <Appenders>
        <Lambda name="Lambda">
            <PatternLayout>
                <pattern>%d{yyyy-MM-dd HH:mm:ss} %X{AWSRequestId} %-5p %c{1}:%L - %m%n</pattern>
            </PatternLayout>
        </Lambda>
    </Appenders>
    <Loggers>
        <Root level="INFO">
            <AppenderRef ref="Lambda" />
        </Root>
        <Logger name="software.amazon.awssdk" level="WARN" />
        <Logger name="software.amazon.awssdk.request" level="DEBUG" />
    </Loggers>
</Configuration>

使用的 Gradle 依赖项：

implementation 'org.apache.logging.log4j:log4j-api:2.17.2'
implementation 'org.apache.logging.log4j:log4j-core:2.17.2'
runtimeOnly 'org.apache.logging.log4j:log4j-slf4j18-impl:2.17.0'
runtimeOnly 'com.amazonaws:aws-lambda-java-log4j2:1.5.1'

服务类日志声明

@Slf4j
public class ABC {
        
    public void method1(){
        log.info(" HELLO WORLD  ________ ");
    }
}

请帮忙。

Answer 1

或者，您可以使用 Context 对象来获取如下所示的记录器

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.LambdaLogger;
import com.amazonaws.services.lambda.runtime.RequestHandler;
public class MyClass implements RequestHandler<Map<String, Object>, Void> {
   @Override
public Void handleRequest(Map<String, Object> inputRequest, Context context) {
LambdaLogger logger = context.getLogger();
logger.log("Hello ");
}}

Answer 2

更改这些行：

runtimeOnly 'org.apache.logging.log4j:log4j-slf4j18-impl:2.17.0'    
runtimeOnly 'com.amazonaws:aws-lambda-java-log4j2:1.5.1'

至

implementation 'org.apache.logging.log4j:log4j-slf4j18-impl:2.17.0'
implementation 'com.amazonaws:aws-lambda-java-log4j2:1.5.1'

为我解决了这个问题

Answer 3

只需添加此依赖项：

            <dependency>
                <groupId>com.amazonaws</groupId>
                <artifactId>aws-lambda-java-log4j2</artifactId>
                <version>1.5.1</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-core</artifactId>
                <version>2.20.0</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-api</artifactId>
                <version>2.20.0</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-slf4j-impl</artifactId>
                <version>2.20.0</version>
            </dependency>

小心删除任何其他日志记录包，还有 slf4j 包。