ClassFormatError during compiling jsp

[cymbi]

i'm using weblogic server 8.1
in my web application, i maded jsp page, and tested it. but my jsp page is not compiled.
while i try to restart weblogic server, i met an error like this.

is anyone give an advise?
help...

---error message -----------------------------------------
<Error> <HTTP> <APPS.ez-drive.co.kr> <myserver> <ExecuteThread: '12' for queue: 'weblogic.kernel.Default'> <<WLS Kernel>> <> <BEA-101019> <[ServletContext(id=23195694,name=DefaultWebApp,context-path=)] Servlet failed with IOException
weblogic.servlet.jsp.CompilationException: Compilation of /opt/bea/user_projects/domains/myDomain/./myserver/.wlnotdelete/extract/myserver_DefaultWebApp_DefaultWebApp/jsp_servlet/__test.java failed.Error occurred during initialization of VM
java/lang/ClassFormatError: Unknown constant tag in .class file


at weblogic.servlet.jsp.JspStub.compilePage(JspStub.java:449)
at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:223)
at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:172)
at weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:518)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:362)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:305)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6350)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3635)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
Caused by: java.io.IOException: Compiler failed executable.exec
at weblogic.utils.compiler.CompilerInvoker.compileMaybeExit(CompilerInvoker.java:470)
at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:329)
at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:337)
at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:322)
at weblogic.servlet.jsp.JspStub.compilePage(JspStub.java:422)
... 12 more

 

[jaybytez]

Sounds like you are trying to utilize a custom tag called constant that you are referring to incorrectly in the jsp page?

-jay