Internal Server Error

[Ambika Jain]

Hi,

I am getting the following error, when I am trying to access the servlet.
Servlet: ChatApp.ChatClasses.servlet.LoginServlet
Content in web.xml:
----------------------------------------------------
<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>ChatApp.ChatClasses.servlet.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/ChatApp/ChatClasses/servlet/LoginServlet</url-pattern>
</servlet-mapping>
---------------------------------------------------

I am unable to find the reason for this error.

-----------ERROR-----------------------
Error 500--Internal Server Error

javax.servlet.ServletException: Servlet class: 'ChatApp.ChatClasses.servlet.LoginServlet' couldn't be instantiated
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:224)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:59)
at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
at weblogic.servlet.internal.StubLifecycleHelper.(StubLifecycleHelper.java:48)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:487)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:234)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:2970)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:1888)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:1810)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1274)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:167)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:139)
--------------------------------------------------------

[Ernest Friedman-Hill]

What theories have you investigated already?

Does the servlet class exist? Is it installed in the right place?

Does the servlet class depend on any libraries that aren't installed?

Does the servlet class have a default constructor?

[Jeroen Wenting]

Sounds to me like a security issue rather than a pure classloading problem, considering the names of the internal BEA classes where the error is reported.

Maybe someone on the WebLogic forum can shed more light.