I am using Log4j in a java web app.
Now, when I run a servlet of that web app, this is the error message that I get--
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Servlet execution threw an exception
root cause
java.lang.NoClassDefFoundError: org/apache/log4j/Logger
com.test.ConfigHelper.<clinit>(ConfigHelper.java:45)
com.test.runsinglecrawljob.doGet(runsinglecrawljob.java:126)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause
java.lang.ClassNotFoundException: org.apache.log4j.Logger
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1533)
com.test.ConfigHelper.<clinit>(ConfigHelper.java:45)
com.test.runsinglecrawljob.doGet(runsinglecrawljob.java:126)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
Now the line of code in ConfigHelper.java (line 45) is given below---
protected static final Logger log = Logger.getLogger(ConfigHelper.class);
I checked Java Build Path-- the JAR file for log4j has been added to build path.
What am I doing wrong here? How do I make log4j work without any problems?
