In looking at the stack trace, the exception is
java.lang.NoClassDefFoundError. This means that the class definition could
not be found to instantiate the class. For struts - does that mean it
cannot find DynaActionFormClass (from the stack trace) or that it cannot
find DynaValidatorForm as defined in the struts-config.xml file:
<form-bean name="verifyForm"
type="org.apache.struts.validator.DynaValidatorForm">
Interestingly enough, both of these classes are in the same jar file as the
class that is trying to instantiate it:
org.apache.struts.util.RequestUtils.createActionForm.
So is this a class loader problem? My struts jar is in the WEB-INF/lib
directory.
Is this a timing issue? When does struts load the struts-config.xml and try
to create the form beans (such as verifyForm)?
----------------------------------------------------------------------
SEVERE: Error creating form bean of class verifyForm
java.lang.NoClassDefFoundError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAcces
sorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstruc
torAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at java.lang.Class.newInstance0(Class.java:296)
at java.lang.Class.newInstance(Class.java:249)
at
org.apache.struts.action.DynaActionFormClass.newInstance(DynaActionFormClass
.java:238)
at
org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:611)
at
org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:635)
at org.apache.jsp.verify$jsp._jspService(verify$jsp.java:97)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja
va:201)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> -----Original Message-----
> From: Jay Wright [mailto:[EMAIL PROTECTED]]
> Sent: Monday, February 03, 2003 4:58 PM
> To: '[EMAIL PROTECTED]'
> Subject: DynaValidatorForm exception.
>
>
>
> I've seen a number of postings regarding a ServletException
> that is thrown
> when a struts tag can't create a DynaValidatorForm:
>
> javax.servlet.ServletException: Exception creating bean of class
> org.apache.struts.validator.DynaValidatorForm: {1}
>
> Basically, when we restart tomcat (4.0.4 on unix, struts
> 1.1-b2) we are
> likely to see this error the first time we try to access our
> webapp. But
> then a second (sometimes third) restart of tomcat will clear
> the problem and
> the webapps will function properly.
>
> Is there any reason for this? Does it have to do with the
> location of the
> struts jar file? Does it need to be in the WEB-INF/lib or
> the common/lib or
> other part of the path?
>
> Has anyone been able to overcome this annoyance?
>
> Jay
>
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