"The path of an ForwardConfig cannot be null" error in Second run

[Rajesh Balu]

Hi,


I am getting the "The path of an ForwardConfig cannot be null" error while running the Struts web application for the second time.

I can run my web application successfully in first attempt, but getting the below error after first run.

org.apache.struts.chain.commands.AbstractExceptionHandler execute Unhandled exception
java.lang.IllegalArgumentException: The path of an ForwardConfig cannot be null Please help me to fix this issue.


Thanks,
Rajesh.B

[Vicky Vijay]

Can you post your struts-config mapping ??


Check the below,

1. Did you enable the validation turned on ???

2. Have you provided the "input" attribute.. ??? If not , set this and check it !!

[Rajesh Balu]

Hi,


I have not turned on the "Validate" as i am not using the validation.

Still do i need to turn it on?


And i have set the input attribute.


Thanks,
Rajesh.B

[Rajesh Balu]

Here is my Struts-config file.


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd">
<struts-config>

<form-beans>
<form-bean name="selectionForm" type="allstate_travel.forms.SelectionForm">
</form-bean>
<form-bean name="MailForm" type="allstate_travel.forms.EMailForm">
</form-bean>
<form-bean name="fileUploadForm" type="allstate_travel.forms.FileUploadForm">
</form-bean>
</form-beans>

<global-exceptions>
</global-exceptions>

<global-forwards>
<forward name="Success" path="/Output.jsp" />
<forward name="Previous" path="/Output.jsp" />
<forward name="Excel" path="/OutputbyExcel.jsp" />
<forward name="Back" path="/Selection.jsp" />
<forward name="Home" path="/Selection.jsp" />
<forward name="mail" path="/FileUpload.jsp" />
</global-forwards>

<action-mappings>
<action path="/Select" type="allstate_travel.actions.SelectionAction"
name="selectionForm" scope="session" validate="true" input="/Selection.jsp">
</action>
<action path="/mail" type="allstate_travel.actions.MailAction"
name="MailForm" scope="session" validate="true" input="/Output.jsp">
</action>
<action path="/strutsUploadAndSave"
type="allstate_travel.actions.StrutsUploadAndSaveAction" name="fileUploadForm"
scope="session" validate="true" input="/FileUpload.jsp">
<forward name="success" path="/TestAttach.jsp"></forward>
</action>
</action-mappings>

[Shankar Tanikella]

Hi Rajesh, Also provide the JSP and Action class method code snippet to see what exactly is happening. Also let us know what exactly meant by second time.

Please use 'code' tags to insert your code. Its really good to read.

[Rajesh Balu]

JSP PAGE

<html:form action="/Select">

<table>

<%

String DRIVER_NAME ="sun.jdbc.odbc.JdbcOdbcDriver";
   String DATABASE_URL = "jdbc:odbc:Read_Excel";

      Class.forName(DRIVER_NAME);
      Connection con = null;
      try {
         con = DriverManager.getConnection(DATABASE_URL);
         Statement stmt = con.createStatement();
         ResultSet rs = stmt.executeQuery
            ("select Resource_Name from [Sheet1$]");
         while (rs.next()) {
         String name=rs.getString(1);
         System.out.println("The attribute is "+name);
          %>
	<tr>
	<td>      <html:checkbox property="name" name="selectionForm" value="<%=name%>"><%out.println(name);%></html:checkbox></td>
	<td>
			
			<select name="<%=name%>">
				<option value="Pick-up/Drop" selected="selected">Pick-up/Drop</option>
				<option value="Drop Only">Drop Only</option>
				<option value="Pick-up only">Pick-up only</option>
			</select>
			
		</td>
		
			<td>
			Enter the Shift time: </td>
			<td>
			<input type="text" name="<%=name%>_Time" size="20" value="1.30 PM- 10:30 PM">		
			</td>
		</tr>
		<%
		
		 }
         rs.close();
         stmt.close();
      }
      catch(Exception e){
    	  System.out.println("The Exception is "+e);
      }
      finally {
         if (con != null)
            con.close();
      }
		 %>
			
	<tr>
	<td align="right">Shift Start date:</td>
	<td>
	<script>DateInput('startdate', true, 'DD-MON-YYYY');</script>
	</td>
	<td>Click the Text box</td>
	<td><html:text property="stdate" onclick="javascript:this.value=this.form.startdate.value" readonly="true" value="">
	</html:text>
	</td>
	</tr>
	<tr>
	<td align="right">Shift End date:</td>
	<td>
	<script>DateInput('enddate', true, 'DD-MON-YYYY');</script>
	</td>
	<td>Click the Text box</td>
	<td><html:text property="endate" onclick="javascript:this.value=this.form.enddate.value" readonly="true" value="">
	</html:text>
	</td>
	</tr>	
	<tr><td><br>      <html:submit value="Submit"></html:submit></td>	
	
</tr>
	</table>
	
	
</html:form>
</body>
</html:html>

ACTION CLASS

package allstate_travel.actions;

public class SelectionAction extends Action

{
	
	public static final String Success="Success";

    public ActionForward execute(ActionMapping mapping, ActionForm form,
	    HttpServletRequest request, HttpServletResponse response)
	    throws Exception {

	ActionMessages errors = new ActionMessages();
	ActionForward forward = new ActionForward(); // return value

	try {

	    // do something here		
		ArrayList resultLists = new ArrayList();	
		SelectionForm selform = (SelectionForm)form;
		String stdat=selform.getStdate();		
		String endat=selform.getEndate();			
		String[] selname=selform.getName();
		System.out.println("The test "+stdat+endat+selname);
		System.out.println("The Time is: "+request.getParameter("Rajesh_Time"));
		
		for (int i=0; i<selname.length; i++)		
		{			
			Map map = new HashMap();
			map.put("MODE", request.getParameter((String)selname[i]));			
			map.put("TIME", request.getParameter((String)selname[i]+"_Time"));			
			map.put("DATE", stdat+" to "+endat);
	    	map.put("NAME", (String)selname[i]);	    	
	    	resultLists.add(map);	    				
		}
		

		request.getSession().setAttribute("detailsexcel", resultLists);
		request.setAttribute("details", resultLists);
		System.out.println("Last line");
		return mapping.findForward(Success);

	} catch (Exception e) {

	    errors.add("name", new ActionMessage("id"));

	}

	if (!errors.isEmpty()) {
	    saveErrors(request, errors);

	} else {


	}

	return (forward);

    }
}

[Rajesh Balu]

Hi,


Second run means, running the application for the second time.

[Rajesh Balu]

Hi,


Could you please help on this?


Thanks,
Rajesh.B

[Sanjeev Kumar Ramineni]

Hi Rajesh,

Can you paste the contents of the log?

Regards,
Sanjeev.

[Rajesh Balu]

Hi,


Here is the error.

[1/30/12 21:24:35:126 IST] 0000002d SystemOut O The test nullnullnull
[1/30/12 21:24:35:126 IST] 0000002d SystemOut O The Time is: null
[1/30/12 21:24:35:141 IST] 0000002d PropertyMessa W org.apache.struts.util.PropertyMessageResources loadLocale Resource org/apache/struts/action/ActionResources_en_US.properties Not Found.
[1/30/12 21:24:35:157 IST] 0000002d PropertyMessa W org.apache.struts.util.PropertyMessageResources loadLocale Resource org/apache/struts/action/ActionResources_en.properties Not Found.
[1/30/12 21:24:35:173 IST] 0000002d AbstractExcep W org.apache.struts.chain.commands.AbstractExceptionHandler execute Unhandled exception
java.lang.IllegalArgumentException: The path of an ForwardConfig cannot be null
at org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:70)
at org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1455)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:793)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:444)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:860)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1566)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:175)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)

[1/30/12 21:24:35:235 IST] 0000002d ExceptionCatc W org.apache.struts.chain.commands.ExceptionCatcher postprocess Exception from exceptionCommand 'servlet-exception'
java.lang.IllegalArgumentException: The path of an ForwardConfig cannot be null
at org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:70)
at org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1455)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:793)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:444)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:860)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1566)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:175)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)

[1/30/12 21:24:35:235 IST] 0000002d servlet E com.ibm.ws.webcontainer.servlet.ServletWrapper service SRVE0068E: Uncaught exception created in one of the service methods of the servlet action in application TravelRequestEAR. Exception created : javax.servlet.ServletException: java.lang.IllegalArgumentException: The path of an ForwardConfig cannot be null
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:286)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1455)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:793)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:444)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:860)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1566)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:175)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)
Caused by: java.lang.IllegalArgumentException: The path of an ForwardConfig cannot be null
at org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:70)
at org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
... 23 more

[1/30/12 21:24:35:251 IST] 0000002d webapp E com.ibm.ws.webcontainer.webapp.WebApp logServletError SRVE0293E: [Servlet Error]-[action]: java.lang.IllegalArgumentException: The path of an ForwardConfig cannot be null
at org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:70)
at org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1455)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:793)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:444)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:860)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1566)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:175)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)

[Sanjeev Kumar Ramineni]

Hi Rajesh,

Based on the log, I could see that selname variable got resolved to null. So when you try to do selname.length in the for loop, a NullPointerException would be thrown and the control would go to catch block after which an empty forward is being thrown.
I guess this is the reason why you are getting the below exception

SRVE0293E: [Servlet Error]-[action]: java.lang.IllegalArgumentException: The path of an ForwardConfig cannot be null

So, please check why the selname variable is getting resolved to null?

Regards,
Sanjeev.