Question

I’m getting an odd exception when running my java web project. It seems like this ‘randomly’ happened after I saved some changes to one of my JSPs. I don’t ever remember changing around any settings. I’ve never run into any errors like this before from this project, it’s had no problem finding the HubPortal class before.

Here’s the full stack trace:

org.apache.jasper.JasperException: An exception occurred processing JSP page /hubmainpage.jsp at line 7

4: %>
5: <%
6: String responsepage = request.getParameter("show");
7: HubPortal hp = new HubPortal();
8: List processList = hp.getProcessList();
9: List clientList = hp.getClientList();
10: List transList = hp.getTransactionTypeList();


Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)


root cause 

javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/log4j/Logger
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:865)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:794)
    org.apache.jsp.hubmainpage_jsp._jspService(hubmainpage_jsp.java:783)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)


root cause 

java.lang.NoClassDefFoundError: org/apache/log4j/Logger
    com.middleware.hts.HubPortal.<clinit>(HubPortal.java:23)
    org.apache.jsp.hubmainpage_jsp._jspService(hubmainpage_jsp.java:66)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

Any ideas as to why I’m all of a sudden encountering this error?

Answer 1

7: HubPortal hp = new HubPortal();

root cause 

java.lang.NoClassDefFoundError: org/apache/log4j/Logger
    com.middleware.hts.HubPortal.<clinit>(HubPortal.java:23)

This means that the log4j jar file is missing in webapp’s runtime classpath while it is been required by the HubPortal class. You need to put it in the same place as the JAR file containing the HubPortal class, for example the /WEB-INF/lib folder or wherever else the HubPortal class is.