Spring MVC（非Spring Boot）外部Log4j2配置日志无法持续记录问题

环境与需求 #

• 部署环境：Tomcat
• 应用类型：非Spring Boot的Spring MVC Web应用
• 核心需求：通过log4j.configurationFile参数加载外部Log4j2配置文件，同时读取服务器文件系统中的外部app-config.yaml配置文件

异常现象 #

• 内部配置正常：将log4j2.xml放入项目资源目录时，日志输出、滚动策略、自动重配置功能均正常工作
• 外部配置异常：使用外部log4j2.xml时出现以下问题：
  • 应用启动后仅生成包含部分初始化日志的文件（如Spring上下文启动、资源解析相关日志）
  • 后续业务逻辑无任何日志输出
  • 运行时新增Appender配置不会生成对应日志文件
  • monitorinterval配置的自动重加载功能完全失效

现有配置实现 #

外部YAML配置加载代码（PropertyConfig.java） #

@Configuration
public class PropertyConfig {

    public static final String ENV_HOME_VARIABLE = "APP_HOME";
    public static final String MAIN_CONFIG_FILE_NAME = "app-config.yaml";

    @Bean
    public static PropertySourcesPlaceholderConfigurer properties(@Autowired ConfigurableEnvironment conf) throws MalformedURLException {
        PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
        YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean();
        String configPath = "file:" + System.getenv(ENV_HOME_VARIABLE) + "/" + MAIN_CONFIG_FILE_NAME;

        yaml.setResources(new UrlResource(configPath));
        propertySourcesPlaceholderConfigurer.setProperties(yaml.getObject());
        Map map = conf.getSystemProperties();
        yaml.getObject().forEach((key, value) -> {
            map.put(key, value);
        });
        return propertySourcesPlaceholderConfigurer;
    }
}

app-config.yaml中的Log4j2配置 #

log4j:
 configurationFile: file:/home/user/appHome/app-log4j2.xml

外部log4j2.xml配置 #

<?xml version="1.0" encoding="UTF-8"?>
<Configuration monitorinterval="30" status="WARN" >

    <Appenders>
        <!-- Rolling File Appender -->
        <RollingFile name="rollingFileApplication" bufferSize="0" bufferedIO="false" append="true">
           <FileName>/home/user/appHome/log/app.log</FileName>
           <FilePattern>/home/user/appHome/log/archive/app%d{yyyy-MM-dd}.log.gz</FilePattern>
            <PatternLayout>
                <Pattern>%d{yyyy-MM-dd HH:mm:ss a} [%t] %-5level %logger{36} - %msg%n</Pattern>
            </PatternLayout>
            <Policies>
                <TimeBasedTriggeringPolicy interval="1" modulate="true" />
            </Policies>

            <DefaultRolloverStrategy>
                <Delete basePath="/home/user/appHome/log/archive/" maxDepth="1">
                    <IfAll>
                        <IfFileName glob="app_*.log*" />
                        <IfLastModified age="7d" />
                    </IfAll>
                </Delete>
            </DefaultRolloverStrategy>
        </RollingFile>
    </Appenders>

    <Loggers>
        <Root level="TRACE">
            <AppenderRef ref="rollingFileApplication" level="TRACE"/>
        </Root>

        <Logger name="ua" additivity="true" level="TRACE">
            <appender-ref ref="rollingFileApplication"/>
        </Logger>

    </Loggers>
</Configuration>

当前日志输出示例 #

2022-07-28 12:53:39 PM [localhost-startStop-1] INFO  org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization started
2022-07-28 12:53:40 PM [localhost-startStop-1] TRACE org.springframework.core.io.support.PathMatchingResourcePatternResolver - Found Equinox FileLocator for OSGi bundle URL resolution
2022-07-28 12:54:10 PM [localhost-startStop-1] INFO  org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization started
2022-07-28 12:54:10 PM [localhost-startStop-1] TRACE org.springframework.core.io.support.PathMatchingResourcePatternResolver - Found Equinox FileLocator for OSGi bundle URL resolution
2022-07-28 12:54:25 PM [localhost-startStop-1] INFO  org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization started
2022-07-28 12:54:25 PM [localhost-startStop-1] TRACE org.springframework.core.io.support.PathMatchingResourcePatternResolver - Found Equinox FileLocator for OSGi bundle URL resolution

问题求助 #

请问该问题的原因是什么？如何解决？可提供更多相关信息，感谢任何建议或意见。

内容的提问来源于stack exchange，提问作者Olexyi