log4j2 未写入文件

Question

log4j2.xml

我已经检查了有关此错误的几个问题，但我无法弄清楚为什么数据没有写入日志文件。

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>

    <Appenders>

        <RollingRandomAccessFile name="HzServer" 
                                 filename="logs/hzServer.log" immediateFlush="false" append="true"
                                 filepattern="logs/hzServer.log-%d{MM-dd-yyyy}">
            <PatternLayout pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1}  %highlight{%level}{FATAL=bg_red, ERROR=red, WARN=yellow, INFO=green, DEBUG=blue} - %msg%throwable%n" />
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB" />
            </Policies>
            <DefaultRolloverStrategy max="20" />
        </RollingRandomAccessFile>

    </Appenders>
    <Loggers>
        <Logger name="com.example" level="debug" includeLocation="true"
                         additivity="false">
                <AppenderRef ref="HzServer" />

         </Logger>
     </Loggers>
</Configuration>

pom.xml

配置似乎没问题，甚至依赖项也已检查。

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.8.2</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-api -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.8.2</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.25</version>
</dependency>

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
    <version>2.8.2</version>
</dependency>

文件 本示例中使用的 Spring boot 应用程序。

@SpringBootApplication
@ComponentScan
public class HzServer implements CommandLineRunner
{
    LoggerContext loggerContext = Configurator.initialize("hzServer","log4j2.xml");
    Logger logger = LoggerFactory.getLogger(HzServer.class);

    @Autowired
    HazelcastInstance hzInstance;

    public static void main(String[] args) 
    {
        SpringApplication.run(HzServer.class);
    }

    @Override
    public void run(String... args) throws Exception 
    {       
        ITopic<String> topic = hzInstance.getTopic("myTopic");

        topic.publish("HelloWorld");

        logger.info("Topic published");
        logger.debug("Topic published");
        logger.error("Topic published");
        logger.trace("Topic published");        
    }
}

当我运行这个程序时，日志文件完全是空白的。无法弄清楚确切的问题。

Answer 1

注意记录器配置中的“name”属性：

<Logger name="com.example" level="debug" includeLocation="true" 
    additivity="false">
    <AppenderRef ref="HzServer" />
</Logger>

名称是com.example，所以，类中的记录器检索应该是

Logger logger = LoggerFactory.getLogger("com.example");

immediateFlush="false"另外，删除附加器上的属性RollingRandomAccessFile。由于某些原因，即使记录器名称正确，文件仍为空。

并删除记录器上下文初始化的行，不需要初始化记录器。

LoggerContext loggerContext = Configurator.initialize("hzServer","log4j2.xml");

希望有帮助。