Hi,
I am encountering a problem java.lang.IllegalArgumentException: object is
not an instance of declaring class . It appears that the digester has
problems parsing ANY action that is in the struts-config.xml.
I had this problem before, when I first deployed the struts-example.war.
At the time, I had deployed it on Tomcat 1.1.17.
I eliminated my problem by going back a version of Tomcat to ver. 1.0.6. I
don't know why that would be different, but although I was curious, I
didn't care too much as I was keen to get started developing using Struts.
However, I am now finding the same problem with my own application, which
was previously working fine. As a test, I redeployed the
struts-example.war and the problem has again manifested itself.
It has stopped my work progress and is frustrating me no end.
Surely, some of you have encountered this before ?
I have included below, the stacttrace of the struts-example , but my own
application has the same problem.
I hope someone can shed some light on this,
Brian
register('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN',
'jar:file:C:/Program Files/Apache Tomcat 4.0
/webapps/struts-example/WEB-INF/lib/struts.jar!/org/apache/struts/resources/struts-config_1_0.dtd'
register('-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN',
'jar:file:C:/Program Files/Apache Tomcat 4.0/webapps/
struts-example/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_2.dtd'
register('-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN',
'jar:file:C:/Program Files/Apache Tomcat 4.0/webapps/
struts-example/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_3.dtd'
resolveEntity('-//Apache Software Foundation//DTD Struts Configuration
1.0//EN', 'http://jakarta.apache.org/struts/dtds/
struts-config_1_0.dtd')
Resolving to alternate DTD 'jar:file:C:/Program Files/Apache Tomcat
4.0/webapps/struts-example/WEB-INF/lib/struts.jar!/
org/apache/struts/resources/struts-config_1_0.dtd'
New org.apache.struts.action.ActionFormBean
Set org.apache.struts.action.ActionFormBean properties
Call
org.apache.struts.action.ActionServlet.addFormBean(ActionFormBean[logonForm])
Pop org.apache.struts.action.ActionFormBean
New org.apache.struts.action.ActionFormBean
Set org.apache.struts.action.ActionFormBean properties
Call
org.apache.struts.action.ActionServlet.addFormBean(ActionFormBean[registrationForm])
Pop org.apache.struts.action.ActionFormBean
New org.apache.struts.action.ActionFormBean
Set org.apache.struts.action.ActionFormBean properties
Call
org.apache.struts.action.ActionServlet.addFormBean(ActionFormBean[subscriptionForm])
Pop org.apache.struts.action.ActionFormBean
New org.apache.struts.action.ActionForward
Set org.apache.struts.action.ActionForward properties
Call
org.apache.struts.action.ActionServlet.addForward(ActionForward[logoff])
Pop org.apache.struts.action.ActionForward
New org.apache.struts.action.ActionForward
Set org.apache.struts.action.ActionForward properties
Call
org.apache.struts.action.ActionServlet.addForward(ActionForward[logon])
Pop org.apache.struts.action.ActionForward
New org.apache.struts.action.ActionForward
Set org.apache.struts.action.ActionForward properties
Call
org.apache.struts.action.ActionServlet.addForward(ActionForward[success])
Pop org.apache.struts.action.ActionForward
New org.apache.struts.action.ActionMapping
Set org.apache.struts.action.ActionMapping properties
Begin event threw exception
java.lang.IllegalArgumentException: object is not an instance of declaring
class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:42)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:28)
at java.lang.reflect.Method.invoke(Method.java:327)
at
org.apache.struts.util.PropertyUtils.setSimpleProperty(PropertyUtils.java:988)
at
org.apache.struts.util.PropertyUtils.setNestedProperty(PropertyUtils.java:904)
at
org.apache.struts.util.PropertyUtils.setProperty(PropertyUtils.java:932)
at org.apache.struts.util.BeanUtils.populate(BeanUtils.java:509)
at
org.apache.struts.digester.SetPropertiesRule.begin(SetPropertiesRule.java:120)
at
org.apache.struts.digester.Digester.startElement(Digester.java:528)
at
org.apache.xerces.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:393)
at
org.apache.xerces.impl.XMLNamespaceBinder.startElement(XMLNamespaceBinder.java:571)
at
org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:796)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:75
2)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentS
cannerImpl.java:1454)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:333)
at
org.apache.xerces.parsers.StandardParserConfiguration.parse(StandardParserConfiguration.java:529)
at
org.apache.xerces.parsers.StandardParserConfiguration.parse(StandardParserConfiguration.java:585)
at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:147)
at
org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1148)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:316)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:91)
at org.apache.struts.digester.Digester.parse(Digester.java:755)
at
org.apache.struts.action.ActionServlet.initMapping(ActionServlet.java:1332)
at
org.apache.struts.action.ActionServlet.init(ActionServlet.java:466)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:918)
at
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:810)
at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3279)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:3421)
at
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:785)
at
org.apache.catalina.core.StandardHost.addChild(StandardHost.java:478)
at
org.apache.catalina.core.StandardHost.install(StandardHost.java:738)
at
org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:324)
at
org.apache.catalina.startup.HostConfig.start(HostConfig.java:389)
at
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:232)
at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:155)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131)
at
org.apache.catalina.core.StandardHost.start(StandardHost.java:638)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343)
at
org.apache.catalina.core.StandardService.start(StandardService.java:388)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:506)
at org.apache.catalina.startup.Catalina.start(Catalina.java:781)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:42)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:28)
at java.lang.reflect.Method.invoke(Method.java:327)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
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