log4j

"log4j:WARN No appenders could be found for logger" 解决办法

• 博客分类： 
• log4j

 zhuan :http://fanrey.iteye.com/blog/1683137

经常看到这样的warning，今天研究了一下，终于大概搞明白了。 

设置log4j配置的路径，需要指定下面的JVM参数： 
-Dlog4j.configuration=file:/C:/workspace/COM_tests/log4j.properties 
or 
-Dlog4j.configuration=file:/C:/workspace/COM_tests/log4j.xml 

或者在代码中指定： 
System.setProperty("log4j.configuration", "file:/C:/workspace/COM_tests/log4j.properties"); 

读取这个配置的source code在org.apache.log4j.LogManager类。 

log4j:WARN No appenders could be found for logger (se.ericsson.jcat.com.cli.testsuites.TestSuiteComCli). 
log4j:WARN Please initialize the log4j system properly. 
如果我们需要解决上面的warning， 
1. 检查log4j.properties or log4j.xml是否被load成功了（如上所述）； 
2. 检查log4j.properties中有没有定义相应的logger。比如上面的问题需要定义如下： 

log4j.logger.se.ericsson.jcat.com.cli.testsuites.TestSuiteComCli=DEBUG, Console 

其中Console是appender. 
log4j.appender.Console=org.apache.log4j.ConsoleAppender 

log4j如果是java程序，需要下面几个类 fastjson用json，可以不要

#config root logger  
log4j.rootLogger = INFO,CONSOLE ,File 
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender  
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout  
log4j.appender.CONSOLE.layout.ConversionPattern=-->%5p{%F:%L}-%m%n  
  
#config this Project.file logger   
log4j.appender.File=org.apache.log4j.DailyRollingFileAppender  
log4j.appender.File.File=/tmp/logContentFile.log  
log4j.appender.File.layout=org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern=-->%5p{%F:%L}-%m%n