使用log4j2时，Spring Boot日志记录部分记录到日志文件和控制台

Question

我试图使用log4j2登录到春季启动应用程序，它工作正常，但问题不是所有日志都转到log4j2.xml中配置的日志文件，少数日志定向到控制台，该控制台附带了我pom的代码段，随后是log4j2 .xml，输出到控制台，输出到日志文件

pom.xml

<groupId>CNER</groupId>
<artifactId>WS</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>WS</name>
<url>http://maven.apache.org</url>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.2.RELEASE</version>
</parent>
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-rest</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>9.4-1200-jdbc4</version>
    </dependency>
    <dependency>
        <groupId>com.mangofactory</groupId>
        <artifactId>swagger-springmvc</artifactId>
        <version>0.8.5</version>
    </dependency>
    <dependency>
        <groupId>commons-httpclient</groupId>
        <artifactId>commons-httpclient</artifactId>
        <version>3.1</version>
    </dependency>
    <dependency>
        <groupId>CNER</groupId>
        <artifactId>DAL</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>com.collabnet.eventrouter</groupId>
        <artifactId>rabbitmq-connection</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>CNER</groupId>
        <artifactId>Utils</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-log4j2</artifactId>
    </dependency>
</dependencies>

<repositories>
    <repository>
        <id>spring-releases</id>
        <name>Spring Releases</name>
        <url>https://repo.spring.io/libs-release</url>
    </repository>
    <repository>
        <id>org.jboss.repository.releases</id>
        <name>JBoss Maven Release Repository</name>
        <url>https://repository.jboss.org/nexus/content/repositories/releases</url>
    </repository>
</repositories>

<pluginRepositories>
    <pluginRepository>
        <id>spring-releases</id>
        <name>Spring Releases</name>
        <url>https://repo.spring.io/libs-release</url>
    </pluginRepository>
</pluginRepositories>

log4j2.xml

 <Properties>

        <Property name="LOG_DIR">${env:logging.file}</Property>
        <Property name="ARCHIVE">${LOG_DIR}/archive</Property>
        <Property name="PATTERN">%-5level %d [%t] %c:%M(%L): %m%n</Property>
    </Properties>
    <Appenders>
        <Console name="STDOUT" target="SYSTEM_OUT">
            <PatternLayout pattern="${PATTERN}"/>
        </Console>

        <RollingFile name="fileWriter"
                     fileName="${LOG_DIR}/erdaemon.log"
                     filePattern="${ARCHIVE}/erdaemon.log.%d{yyyy-MM-dd-hh-mm}.gz">
            <PatternLayout pattern="${PATTERN}"/>
            <OnStartupTriggeringPolicy  />
        </RollingFile>
    </Appenders>
    <Loggers>
        <Root level="INFO">
            <AppenderRef ref="fileWriter"/>
        </Root>
        <Logger name="com" level="TRACE" additivity="false">
            <AppenderRef ref="fileWriter"/>
        </Logger>

    </Loggers>

控制台输出

 > SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found
    > binding in
    > [jar:file:/C:/Users/dinesh.reddy/.m2/repository/org/slf4j/slf4j-simple/1.7.13/slf4j-simple-1.7.13.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in
    > [jar:file:/C:/Users/dinesh.reddy/.m2/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.4.1/log4j-slf4j-impl-2.4.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
    > SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an
    > explanation. SLF4J: Actual binding is of type
    > [org.slf4j.impl.SimpleLoggerFactory]
    > 
    > [main] INFO CNER.WS.App - Starting App on HYD01-DINESH-LT with PID
    > 11444 (E:\masterws\event_router\server\WebServices\WS\target\classes
    > started by dinesh.reddy in
    > E:\masterws\event_router\server\WebServices\WS) [main] INFO
    > CNER.WS.App - The following profiles are active: default [main] INFO
    > org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext
    > - Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@40c80397:
    > startup date [Fri Mar 25 06:22:11 UTC 2016]; root of context hierarchy
    > [main] INFO
    > org.springframework.beans.factory.support.DefaultListableBeanFactory -
    > Overriding bean definition for bean 'beanNameViewResolver' with a
    > different definition: replacing [Root bean: class [null]; scope=;
    > abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0;
    > autowireCandidate=true; primary=false;
    > factoryBeanName=org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration;
    > factoryMethodName=beanNameViewResolver; initMethodName=null;
    > destroyMethodName=(inferred); defined in class path resource

日志文件输出

INFO  2016-03-25 11:48:31,816 [main] CNER.WS.App:main(54): Starting Event Router Server ...
INFO  2016-03-25 06:18:32,797 [background-preinit] org.hibernate.validator.internal.util.Version:<clinit>(17): HV000001: Hibernate Validator 5.2.2.Final
INFO  2016-03-25 06:18:38,409 [localhost-startStop-1] org.hibernate.jpa.internal.util.LogHelper:logPersistenceUnitInformation(46): HHH000204: Processing PersistenceUnitInfo [
    name: default
    ...]

Answer 1

尝试摆脱多个绑定：

SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found
> binding in
> [jar:file:/C:/Users/dinesh.reddy/.m2/repository/org/slf4j/slf4j-simple/1.7.13/slf4j-simple-1.7.13.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in
> [jar:file:/C:/Users/dinesh.reddy/.m2/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.4.1/log4j-slf4j-impl-2.4.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]

排除提到的其中一个罐子，最好不要在春季之前添加。

看一下依赖项（mvndependency：tree，也参见mvn依赖项树 ），并<exclude>不需要的依赖项。