项目jar正常，我们项目log4j中已经配置了root日志级别level为info，但是启动项目后，自定义logger日志只能打印error级别。

启动服务时总是出现没有设置root logger的日志级别。

2018-05-09 16:24:34,309 main WARN No Root logger was configured, 
creating default ERROR-level Root logger with Console appender

但是我们日志文件已经设置了info级别

 <Root level="INFO">
      <AppenderRef ref="ConsoleAppend"/>
    </Root>

分析

经过debug发现，加载的日志文件不是我们配置的日志文件，而是rocketmq下的配置的日志文件。

生效配置

打开该配置文件

<!DOCTYPE xml>
<Configuration status="warn" name="RocketmqClient">
    <Appenders>
        <Console name="STDOUT-APPENDER">
            <PatternLayout pattern="%-5p %c{2} , %m%n"/>
        </Console>
        <RollingFile name="RocketmqClientAppender" fileName="${sys:client.logRoot}/rocketmq_client.log"
                     filePattern="${sys:client.logRoot}/rocketmq_client-%d{yyyy-MM-dd}-%i.log">
            <PatternLayout pattern="%d{yyy-MM-dd HH\:mm\:ss,SSS} %p %c{1}(%L) - %m%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="1 GB"/>
            </Policies>
            <DefaultRolloverStrategy max="${sys:client.logFileMaxIndex}"/>
        </RollingFile>
    </Appenders>
    <Loggers>
        <logger name="RocketmqClient" level="${sys:client.logLevel}" additivity="false">
            <appender-ref ref="RocketmqClientAppender"/>
        </logger>

        <logger name="RocketmqCommon" level="${sys:client.logLevel}" additivity="false">
            <appender-ref ref="RocketmqClientAppender"/>
        </logger>

        <logger name="RocketmqRemoting" level="${sys:client.logLevel}" additivity="false">
            <appender-ref ref="RocketmqClientAppender"/>
        </logger>
    </Loggers>
</Configuration>

分析确实不存在root level的配置。

1、我们自定义的日志配置文件

自定义日志文件

2、目前我们使用的是rocketmq-4.2.0版本

rocketmq日志文件

3、分析mq日志配置源码ClientLogger

public class ClientLogger {
    public static final String CLIENT_LOG_ROOT = "rocketmq.client.logRoot";
    public static final String CLIENT_LOG_MAXINDEX = "rocketmq.client.logFileMaxIndex";
    public static final String CLIENT_LOG_LEVEL = "rocketmq.client.logLevel";

    private static Logger log;

    private static Logger createLogger(final String loggerName) {
        //System.getProperty获取logConfigFilePath
        String logConfigFilePath = System.getProperty("rocketmq.client.log.configFile", System.getenv("ROCKETMQ_CLIENT_LOG_CONFIGFILE"));
        //是否加载rocketmq.client.log.loadconfig--默认为true
        Boolean isloadconfig =
            Boolean.parseBoolean(System.getProperty("rocketmq.client.log.loadconfig", "true"));
        //log4J日志资源配置
        final String log4JResourceFile =
            System.getProperty("rocketmq.client.log4j.resource.fileName", "log4j_rocketmq_client.xml");
        //logback日志资源配置
        final String logbackResourceFile =
            System.getProperty("rocketmq.client.logback.resource.fileName", "logback_rocketmq_client.xml");
        //log4J2日志资源配置
        final String log4J2ResourceFile =
            System.getProperty("rocketmq.client.log4j2.resource.fileName", "log4j2_rocketmq_client.xml");

        String clientLogRoot = System.getProperty(CLIENT_LOG_ROOT, System.getProperty("user.home") + "/logs/rocketmqlogs");
        System.setProperty("client.logRoot", clientLogRoot);
        String clientLogLevel = System.getProperty(CLIENT_LOG_LEVEL, "INFO");
        System.setProperty("client.logLevel", clientLogLevel);
        String clientLogMaxIndex = System.getProperty(CLIENT_LOG_MAXINDEX, "10");
        System.setProperty("client.logFileMaxIndex", clientLogMaxIndex);
        //允许加载配置
        if (isloadconfig) {
            try {
                ILoggerFactory iLoggerFactory = LoggerFactory.getILoggerFactory();
                Class classType = iLoggerFactory.getClass();
                if (classType.getName().equals("org.slf4j.impl.Log4jLoggerFactory")) {
                    Class<?> domconfigurator;
                    Object domconfiguratorobj;
                    domconfigurator = Class.forName("org.apache.log4j.xml.DOMConfigurator");
                    domconfiguratorobj = domconfigurator.newInstance();
                    if (null == logConfigFilePath) {
                        Method configure = domconfiguratorobj.getClass().getMethod("configure", URL.class);
                        URL url = org.apache.rocketmq.client.log.ClientLogger.class.getClassLoader().getResource(log4JResourceFile);
                        configure.invoke(domconfiguratorobj, url);
                    } else {
                        Method configure = domconfiguratorobj.getClass().getMethod("configure", String.class);
                        configure.invoke(domconfiguratorobj, logConfigFilePath);
                    }

                } else if (classType.getName().equals("ch.qos.logback.classic.LoggerContext")) {
                    Class<?> joranConfigurator;
                    Class<?> context = Class.forName("ch.qos.logback.core.Context");
                    Object joranConfiguratoroObj;
                    joranConfigurator = Class.forName("ch.qos.logback.classic.joran.JoranConfigurator");
                    joranConfiguratoroObj = joranConfigurator.newInstance();
                    Method setContext = joranConfiguratoroObj.getClass().getMethod("setContext", context);
                    setContext.invoke(joranConfiguratoroObj, iLoggerFactory);
                    if (null == logConfigFilePath) {
                        URL url = org.apache.rocketmq.client.log.ClientLogger.class.getClassLoader().getResource(logbackResourceFile);
                        Method doConfigure =
                            joranConfiguratoroObj.getClass().getMethod("doConfigure", URL.class);
                        doConfigure.invoke(joranConfiguratoroObj, url);
                    } else {
                        Method doConfigure =
                            joranConfiguratoroObj.getClass().getMethod("doConfigure", String.class);
                        doConfigure.invoke(joranConfiguratoroObj, logConfigFilePath);
                    }

                } else if (classType.getName().equals("org.apache.logging.slf4j.Log4jLoggerFactory")) {
                    Class<?> joranConfigurator = Class.forName("org.apache.logging.log4j.core.config.Configurator");
                    Method initialize = joranConfigurator.getDeclaredMethod("initialize", String.class, String.class);
                    if (null == logConfigFilePath) {
                        initialize.invoke(joranConfigurator, "log4j2", log4J2ResourceFile);
                    } else {
                        initialize.invoke(joranConfigurator, "log4j2", logConfigFilePath);
                    }
                }
            } catch (Exception e) {
                System.err.println(e);
            }
        }
        return LoggerFactory.getLogger(LoggerName.CLIENT_LOGGER_NAME);
    }

    public static Logger getLog() {
        if (log == null) {
            log = createLogger(LoggerName.CLIENT_LOGGER_NAME);
            return log;
        } else {
            return log;
        }
    }

    public static void setLog(Logger log) {
        org.apache.rocketmq.client.log.ClientLogger.log = log;
    }

}

经过分析可知：我们可以通过System.setProperty来设置一些属性，屏蔽mq的日志配置，所以我们在mq的配置bean中设置：

RocketMQConfiguration(){
   System.setProperty("rocketmq.client.log.loadconfig","false");
}

参考文章：
https://www.cnblogs.com/devilfeng/p/6869166.html
https://blog.csdn.net/wyfk2013/article/details/78218221

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