How to configure log4J in my web project

Question

Theis is my log4j.properties file:

log4j.rootCategory=INFO, R

log4j.logger.com.smsoffice=DEBUG

#log4j.logger.org.apache.wicket=DEBUG

#log4j.logger.org.hibernate=DEBUG
#log4j.additivity.org.hibernate.SQL=false

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=${catalina.home}/webapps/ROOT/logs/smsoffice.log
log4j.appender.R.MaxFileSize=10MB
log4j.appender.R.MaxBackupIndex=20
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d{dd-MM-yyyy HH:mm:ss,SSS} %p %C.%M:%L - %m%n

This file is in src/main/resources. I am using tomcat web server. In com.smsoffice.launch I have WebApp.java and I am using log4j in this way:

private static final Logger logger = Logger.getLogger(WebApp.class);
logger.info("Initializing web application");

When I start the app log4j writes in the console only this:

log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext). log4j:WARN Please initialize the log4j system properly.

I have logs in ${catalina.home}/webapps/ROOT/logs/smsoffice.log but it is not shown in the console when I am debuging.

Anyone knows what I am missing ?

EDIT:

here is the full log:

log4j: Trying to find [C:\projects\smsofficenew\app\sms-office-webapp\src\main\resources\log4j.properties] using context classloader WebappClassLoader
  context: /ROOT
  delegate: false
  repositories:
    /WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@1489c411
.
log4j: Trying to find [C:\projects\smsofficenew\app\sms-office-webapp\src\main\resources\log4j.properties] using WebappClassLoader
  context: /ROOT
  delegate: false
  repositories:
    /WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@1489c411
 class loader.
log4j: Trying to find [C:\projects\smsofficenew\app\sms-office-webapp\src\main\resources\log4j.properties] using ClassLoader.getSystemResource().
log4j: Could not find resource: [C:\projects\smsofficenew\app\sms-office-webapp\src\main\resources\log4j.properties].
log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

BUT the resource [C:\projects\smsofficenew\app\sms-office-webapp\src\main\resources\log4j.properties] is here !!! So the real problem is why log4j cannot find this file ???

try to add "log4j.rootLogger=DEBUG, stdout, file" at top of your file — Anant Laxmikant Bobde, Jul 13 '15 at 07:50
possible duplicate of [No appenders could be found for logger(log4j)?](http://stackoverflow.com/questions/12532339/no-appenders-could-be-found-for-loggerlog4j) — Raedwald, Jul 13 '15 at 11:35

score 0 · Answer 1 · answered Jul 13 '15 at 07:52

you may want to add following log4j.properties file in resources folder

# Root logger option
log4j.rootLogger=DEBUG, stdout, file

# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

# Redirect log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
#outputs to Tomcat home
log4j.appender.file.File=${catalina.home}/logs/myapp.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

try changing file location though

Hope this helps

no result .. this is the error : log4j:ERROR LogMananger.repositorySelector was null likely due to error in class reloading, using NOPLoggerRepository. log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext). log4j:WARN Please initialize the log4j system properly. — johnpolqkov, Jul 13 '15 at 09:03

Kulbhushan Singh · Answer 2 · 2015-07-13T11:39:07.883

0

In your log4j.properties file you have not defined what exactly you want to append i.e. log4j.appender.stdout.Target=System.out.

You can just look for any standard file and you will get it.

Where exactly you are placing your properties file?

edited Jul 13 '15 at 11:39

answered Jul 13 '15 at 11:25

Kulbhushan Singh

627
4
20

here is my file: /sms-office-webapp/src/main/resources/log4j.properties. I tried to put Target but it dont work again. – johnpolqkov Jul 13 '15 at 11:52
Your application is web-application or Standalone java application? – Kulbhushan Singh Jul 13 '15 at 12:42
my application is web app part of maven app – johnpolqkov Jul 13 '15 at 12:58
Are you using Log4j 1.2.15? Trying upgrading it to 1.2.17 or edit below.CATALINA_OPTS=-Dorg.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES=false – Kulbhushan Singh Jul 13 '15 at 13:09
resently I changed it to 1.2.17 – johnpolqkov Jul 13 '15 at 13:10
Then try editing ATALINA_OPTS=-Dorg.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_‌REFERENCES=false – Kulbhushan Singh Jul 13 '15 at 13:13

How to configure log4J in my web project

2 Answers2