JasperException in my struts applicaion

[sirisha kukunuri]

Hi all,
I wrote a small struts application.Yesterday it worked well.Today when i am trying to run that application i am getting following exception.

 HTTP Status 500 - 
 
--------------------------------------------------------------------------------
 
type Exception report
 
message 
 
description The server encountered an internal error () that prevented it from fulfilling this request.
 
exception 
 
org.apache.jasper.JasperException: Exception creating bean of class user.UserForm: {1}
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 

root cause 
 
javax.servlet.ServletException: Exception creating bean of class user.UserForm: {1}
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774)
org.apache.jsp.pages.register_jsp._jspService(register_jsp.java:81)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 

root cause 
 
javax.servlet.jsp.JspException: Exception creating bean of class user.UserForm: {1}
org.apache.struts.taglib.html.FormTag.initFormBean(FormTag.java:463)
org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:433)
org.apache.jsp.pages.register_jsp._jspx_meth_html_005fform_005f0(register_jsp.java:131)
org.apache.jsp.pages.register_jsp._jspx_meth_html_005fhtml_005f0(register_jsp.java:105)
org.apache.jsp.pages.register_jsp._jspService(register_jsp.java:72)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.26 logs.
 

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Apache Tomcat/5.5.26   

I don't know what happened.I didn't change any code.But i am getting this exception.Can any one please tell me what happened .

Thanks,
Kukunuri.