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logginglog4j2tomcat9

Redirect Tomcat 9 servlet exception logs to log4j2

I am using log4j2 for logging my JSF web application.

  1. I created log4j2.xml file under WEB-INF folder and configured it

  2. Then added these dependencies to my pom.xml and used log4j2 in my application

    <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.13.3</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.13.3</version>
</dependency>

  3. I followed official guide for log4j2 integration with my Tomcat 9 here Tomcat log4j2

  4. I added org.apache.logging.log4j:log4j-jul:2.13.3 jar to the created lib directory in step 3 then configured Tomcat logging by adding the following code to setenv.bat in Tomcat/bin

    set LOGGING_MANAGER=-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager

Now I can get Tomcat log messages, my web application logs and JSF logs printed according to my log4j2 format.

The problem is, I am still getting javax.servlet.ServletException messages which do not follow my log4j2 log format. They seem to ignore my log4j2 configuration.

How can I fix this issue?

Thank you.

Solution

  • I figured out that javax.servlet.ServletException messages were not handled by my application. Therefore they are not formatted according to my log4j2 configuration. I have solved this issue by creating a custom JSF exception handler and logging catched exceptions with log4j2.