Question

我的类路径中有以下log4j.xml文件：

<appender class="org.apache.log4j.ConsoleAppender" name="Console">
    <param name="Threshold" value="info" />
    <layout class="org.apache.log4j.PatternLayout">
        <param value="%d %-5p [%t] %C (%F:%L) - %m%n" name="ConversionPattern"/>
    </layout>
    <filter class="org.apache.log4j.varia.LevelRangeFilter">
      <param value="info" name="LevelMax"/>
      <param value="info" name="LevelMin"/>
    </filter>
</appender>

<logger name="de.scm.cci.importer">
    <level value="info"/>
</logger>

<logger name="com.mchange">
    <level value="info"/>
</logger>
<logger name="jdbc">
    <level value="error"/>
</logger>
<logger name="org.hibernate">
    <level value="info"/>
</logger>
<logger name="org.springframework">
    <level value="info"/>
</logger>

<root>
    <level value="INFO"/>
    <appender-ref ref="Console"/>
</root>

以下是输出的前几行：

log4j: Trying to find [log4j.xml] using context classloader sun.misc.Launcher$AppClassLoader@7220722.
log4j: Using URL [file:/opt/app/cci/CCIImporter/jar/log4j.xml] for automatic log4j configuration.
log4j: Preferred configurator class: org.apache.log4j.xml.DOMConfigurator
log4j: System property is :null
log4j: Standard DocumentBuilderFactory search succeded.
log4j: DocumentBuilderFactory is: org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
log4j: debug attribute= "true".
log4j: reset attribute= "false".
log4j: Threshold ="null".
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [de.scm.cci.importer] additivity to [true].
log4j: Level value for de.scm.cci.importer is  [info].
log4j: de.scm.cci.importer level set to INFO
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [com.mchange] additivity to [true].
log4j: Level value for com.mchange is  [info].
log4j: com.mchange level set to INFO
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [jdbc] additivity to [true].
log4j: Level value for jdbc is  [error].
log4j: jdbc level set to ERROR
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [org.hibernate] additivity to [true].
log4j: Level value for org.hibernate is  [info].
log4j: org.hibernate level set to INFO
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [org.springframework] additivity to [true].
log4j: Level value for org.springframework is  [info].
log4j: org.springframework level set to INFO
log4j: Level value for root is  [INFO].
log4j: root level set to INFO
log4j: Class name: [org.apache.log4j.ConsoleAppender]
log4j: Setting property [threshold] to [INFO].
log4j: Parsing layout of class: "org.apache.log4j.PatternLayout"
log4j: Setting property [conversionPattern] to [%d %-5p [%t] %C (%F:%L) - %m%n].
log4j: Setting property [levelMax] to [INFO].
log4j: Setting property [levelMin] to [INFO].
log4j: Adding filter of type [class org.apache.log4j.varia.LevelRangeFilter] to appender named [Console].
log4j: Adding appender named [Console] to category [root].
2014-02-25 13:20:25,534 INFO  [main] de.scm.cci.importer.RunTest (RunTest.java:21) - Starting loop mode
2014-02-25 13:20:25,537 INFO  [main] de.scm.cci.importer.RunTest (RunTest.java:24) - Started...
PERSISTENCE LOADING
2014-02-25 13:20:25,767 INFO  [main] org.springframework.context.support.AbstractApplicationContext (AbstractApplicationContext.java:513) - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@52545254: startup date [Tue Feb 25 13:20:25 CET 2014]; root of context hierarchy
233 [main] INFO org.springframework.context.support.ClassPathXmlApplicationContext  - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@52545254: startup date [Tue Feb 25 13:20:25 CET 2014]; root of context hierarchy
2014-02-25 13:20:25,877 INFO  [main] org.springframework.beans.factory.xml.XmlBeanDefinitionReader (XmlBeanDefinitionReader.java:316) - Loading XML bean definitions from class path resource [de/scm/cci/backend/public/spring-config.xml]

弹簧一开始加载，输出的每一行都加倍：

2014-02-25 13:20:25,767 INFO  [main] org.springframework.context.support.AbstractApplicationContext (AbstractApplicationContext.java:513) - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@52545254: startup date [Tue Feb 25 13:20:25 CET 2014]; root of context hierarchy
233 [main] INFO org.springframework.context.support.ClassPathXmlApplicationContext  - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@52545254: startup date [Tue Feb 25 13:20:25 CET 2014]; root of context hierarchy

我完全无能为力，第二行来自哪里。

编辑：很奇怪：我收到了WARN消息，尽管我将所有可能的threasholds和东西都设置为INFO ......？

Answer 1

因为您只声明了一个appender，并且重复日志的格式不相同，所以很明显您有多个日志框架同时进行：

log4j在您自己的代码中
在Spring内部进行公共记录

您需要做的是：

从类路径中删除commons-logging依赖项。如果您使用的是maven，则必须从每个Spring模块中排除commons-logging jar。
将jcl-over-slf4j添加到您的类路径

Maven示例（如何删除commons-logging）：注意：在每个Spring依赖项中都需要这种排除语法

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-web</artifactId>
  <version>${spring.version}</version>
  <exclusions>
    <exclusion>
      <artifactId>commons-logging</artifactId>
      <groupId>commons-logging</groupId>
    </exclusion>
  </exclusions>
</dependency>

Maven示例（如何添加slf4j，您可能已经这样做了）：

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>1.7.7</version>
</dependency>

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>jcl-over-slf4j</artifactId>
  <version>1.7.7</version>
</dependency>

如果您不使用Maven，请告诉我，我会尽力帮助您解决特定环境。

Answer 2

Spring Framework不直接使用log4j - 它使用commons-logging。

它的行为将取决于应用程序类路径中的其他日志记录实现。

您的班级路径中有哪些与日志相关的jar？

重复log4j日志记录

2 个答案: