Log4J properties file - where to put it

Question

I wrote a web service project using netbeans 6.7.1 with glassfish v2.1, put log4j.properties to the root dir of project and use

static Logger logger = Logger.getLogger(MyClass.class);

in Constructor: PropertyConfigurator.configure("log4j.properties");

and in functions:

logger.info("..."); logger.error("..."); ...

but, it is error info(actually, I have tried to put it almost every dir that I could realize):

log4j:ERROR Could not read configuration file [log4j.properties]. java.io.FileNotFoundException: log4j.properties (The system cannot find the file specified) at java.io.FileInputStream.open(Native Method) at java.io.FileInputStream.(FileInputStream.java:106) at java.io.FileInputStream.(FileInputStream.java:66) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:297) at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:315) at com.corp.ors.demo.OrsDemo.main(OrisDemo.java:228) log4j:ERROR Ignoring configuration file [log4j.properties]. log4j:WARN No appenders could be found for logger (com.corp.ors.demo.OrsDemo). log4j:WARN Please initialize the log4j system properly.

the example project could be get from http://www.91files.com/?N3F0QGQPWMDGPBRN0QA8

Answer 1

The file should be located in the WEB-INF/classes directory. This directory structure should be packaged within the war file.

Answer 2

You have to put it in the root directory, that corresponds to your execution context.

Example:

    MyProject
       src
           MyClass.java
           log4j.properties

If you start executing from a different project, you need to have that file in the project used for starting the execution. For example, if a different project holds some JUnit tests, it needs to have also its log4j.properties file.

---

I suggest using log4j.xml instead of the log4j.properties. You have more options, get assistance from your IDE and so on...

Answer 3

You can specify config file location with VM argument -Dlog4j.configuration="file:/C:/workspace3/local/log4j.properties"

Answer 4

A few technically correct specific answers already provided but in general, it can be anywhere on the runtime classpath, i.e. wherever classes are sought by the JVM.

This could be the /src dir in Eclipse or the WEB-INF/classes directory in your deployed app, but it's best to be aware of the classpath concept and why the file is placed in it, don't just treat WEB-INF/classes as a "magic" directory.

Answer 5

i know it's a bit late to answer this question, and maybe you already found the solution, but i'm posting the solution i found (after i googled a lot) so it may help a little:

1. put log4j.properties under WEB-INF\classes of the project as mentioned previously in this thread.
2. put log4j-xx.jar under WEB-INF\lib
3. test if log4j was loaded: add "-Dlog4j.debug" @ the end of your java options of tomcat

hope this will help

rgds