log4j WARN No appenders could be found for logger in web xml

Question

I already put the log4jConfigLocation in web xml  but I still get the following warning   log4j WARN No appenders could be found for logger          org springframework web context ContextLoader   log4j WARN Please initialize the log4j system properly    What did I miss    lt  xml version  1 0  encoding  UTF-8   gt   lt  DOCTYPE web-app PUBLIC  -  Sun Microsystems  Inc   DTD Web Application 2 3  EN        java sun com dtd web-app 2 3 dtd  gt   lt web-app gt       lt context-param gt           lt param-name gt contextConfigLocation lt  param-name gt           lt param-value gt               WEB-INF applicationContext xml          lt  param-value gt       lt  context-param gt       lt context-param gt           lt param-name gt log4jConfigLocation lt  param-name gt           lt param-value gt  WEB-INF classes log4j properties lt  param-value gt       lt  context-param gt        lt listener gt           lt listener-class gt              org springframework web util Log4jConfigListener          lt  listener-class gt       lt  listener gt       lt listener gt           lt listener-class gt              org springframework web context ContextLoaderListener          lt  listener-class gt       lt  listener gt        lt servlet gt           lt servlet-name gt suara2 lt  servlet-name gt           lt servlet-class gt              org springframework web servlet DispatcherServlet          lt  servlet-class gt       lt  servlet gt       lt servlet-mapping gt           lt servlet-name gt suara2 lt  servlet-name gt           lt url-pattern gt    lt  url-pattern gt       lt  servlet-mapping gt   lt  web-app gt

User · Answer

Add log4jExposeWebAppRoot -  false in your web xml  It works with me      lt context-param gt       lt param-name gt log4jConfigLocation lt  param-name gt       lt param-value gt path log4j properties lt  param-value gt   lt  context-param gt   lt context-param gt       lt param-name gt log4jExposeWebAppRoot lt  param-name gt       lt param-value gt false lt  param-value gt   lt  context-param gt   lt listener gt       lt listener-class gt org springframework web util Log4jConfigListener lt  listener-class gt   lt  listener gt

User · Answer

You may get this error when your log4j properties are not present in the classpath    This means you have to move the log4j properties into the src folder and set the output to the bin folder so that at run time log4j properties will read from the bin folder and your error will be resolved easily

User · Answer

Put these lines in the beginning of web xml   lt listener gt       lt listener-class gt org springframework web util Log4jConfigListener lt  listener-class gt   lt  listener gt   lt context-param gt       lt param-name gt log4jConfigLocation lt  param-name gt       lt param-value gt classpath  main resources log4j xml lt  param-value gt   lt  context-param gt

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You ll see this warning if log4j can t find a file  log4j properties  or  log4j xml  anywhere

User · Answer

I had the same problem   Same configuration settings and same warning message   What worked for me was    Changing the order of the entries      I put the entries for the log configuration   the context param and the listener   on the top of the file   before the entry for the applicationContext xml   and it worked     The Order matters   i guess

User · Answer

In my case the solution was easy  You don t need to declare anything in your web xml   Because your project is a web application  the config file should be on WEB-INF classes after deployment   I advise you to create a Java resource folder  src main resources  to do that  best pratice   Another approach is to put the config file in your src main java   Beware with the configuration file name  If you are using XML  the file name is log4j xml  otherwise log4j properties

User · Answer

Or  you could be doing what I did and define the logger before the log configuration file has been loaded  This would be as they say   Putting the cart before the horse    In the code   public static Logger logger   Logger getLogger  RbReport          later on   PropertyConfigurator configure l4j   logger   Logger getLogger  RbReport      Fix was to initialize the logger after the configuration was loaded   For the geeks it was  Putting Descarte b4 d horse

User · Answer

If that s the entire log4j properties file it looks like you re never actually creating a logger  You need a line like   log4j rootLogger debug A1

User · Answer

If still help  verify the name of archive  it must be exact  log4j properties  or  log4j xml   case sensitive   and follow the hint by  Alain O Dea   I was geting the same error  but after make these changes everthing works fine  just like a charm  -   hope this helps

User · Answer

I had log4j properties in the correct place in the classpath and still got this warning with anything that used it directly   Code using log4j through commons-logging seemed to be fine for some reason   If you have   log4j rootLogger WARN   Change it to   log4j rootLogger WARN  console log4j appender console org apache log4j ConsoleAppender log4j appender console layout org apache log4j PatternLayout log4j appender console layout conversionPattern  5p   t    F  L  -  m n   According to http   logging apache org log4j 1 2 manual html       The root logger is anonymous but can be accessed with the Logger getRootLogger   method  There is no default appender attached to root    What this means is that you need to specify some appender  any appender  to the root logger to get logging to happen   Adding that console appender to the rootLogger gets this complaint to disappear

User · Answer

If you want to configure for the standalone log4j applications  you can use the BasicConfigurator  This solution won t be good for the web applications like Spring environment    You need to write-  BasicConfigurator configure      or  ServletContext sc   config getServletContext    String log4jLocation   config getInitParameter  log4j-properties-location    String webAppPath   sc getRealPath       String log4jProp   webAppPath   log4jLocation  PropertyConfigurator configure log4jProp

User · Answer

OK  I see a lot of answer and some very correct   However  none fixed my problem  The problem in my case was the UNIX filesystem permissions had the log4j properties file I was editing on the server as owned by root  and readable by only root  However  the web application I was deploying was to tomcat couldn t read the file as tomcat runs as user tomcat on Linux systems by default   Hope this helps  so the solution was typing  chown tomcat tomcat log4j properties  in the directory where the log4j properties file  resides

[java] log4j:WARN No appenders could be found for logger in web.xml

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