I'm trying to find out why the paramList attribute of
my param could be null.
Here is the execute method of my action.
ActionForward forward = null;
initUser(request);
HttpSession session = request.getSession(false);
UserView userView = (UserView) session.getAttribute("userView");
ArrayList paramList =null;
BrowseParamHandler handler = new BrowseParamHandler();
try
{
paramList = handler.executeGetAllParams(userView);
}
catch (TechnicalException e)
{
System.out.println(e.getMessage() );
}
((ParamForm) form).setParamList(paramList);
forward = mapping.findForward("success");
return forward;
As you can see in bold, the param list is initialize to null.
But I can't imagine it to be null because the executegetAllParams(...)
always returns values
when the bug occurs.
Do you think I have to inititialize the list ...
Meissa
Dirk Markert <[EMAIL PROTECTED]>
24/06/2003 11:25
Veuillez répondre à "Struts Users Mailing List"
Pour : "Struts Users Mailing List" <[EMAIL PROTECTED]>
cc :
Objet : Re: Réf. : Re: Réf. : Re: very strange errors (no collection found
series)
Hallo Meissa,
what I found out is:
The exception you get is raised in the iterate tag of struts (line
281, IterateTag.java). The reason is, as you can guess, that your
property "paramList" from "paramForm" is null. So the question is, why
is it null? Are there any circumstances possible under which this can
happen?
Regards,
Dirk
***************************************************************
mSanf> Dirk,
mSanf> here is the sensible extract of the jsp
mSanf> <logic:iterate name="paramForm" property="paramList"
id="paramView">
mSanf> <bean:define id="index" name="paramView"
property="index" type="java.lang.String"/>
mSanf> <bean:define id="codeParam" name="paramView"
property="code" type="java.lang.String"/>
mSanf> <tr class="<%= (Integer.parseInt(index)%2 ==
0)?"impaire":"paire"%>">
mSanf> <%
mSanf> String
mSanf>
updateUrl="/paramInitUpdate.do?task=initUpdateParam&codeParam="+codeParam;
mSanf> %>
mSanf> <td width="25%">
mSanf> <html:link
action="<%=editUrl%>"><bean:write name="paramView"
property="label"/></html:link>
mSanf> </td>
mSanf> <td><bean:write name="paramView"
property="media"/></td>
mSanf> <td><bean:write name="paramView"
property="registrationDate"/></td>
mSanf> <td><bean:write name="paramView"
property="statut"/></td>
mSanf> <td width="50">
mSanf> <html:link
action="<%=updateUrl%>"><html:img srcKey="image.modify" alt="Modifier"
border="0"/></html:link>
mSanf> </td>
mSanf> </tr>
mSanf> </logic:iterate>
mSanf> A simple logic iterate tag . I'm iterating the paramList attribute
which
mSanf> is an ArrayList property of the"paramForm" that is put in the
request
mSanf> from the action.
mSanf> I know I could simply put the paramList in the request directly...
mSanf> Do you think there is something I'm doing wrong.
mSanf> Meissa
mSanf> Dirk Markert <[EMAIL PROTECTED]>
mSanf> 24/06/2003 09:55
mSanf> Veuillez répondre à "Struts Users Mailing List"
mSanf> Pour : "Struts Users Mailing List"
<[EMAIL PROTECTED]>
mSanf> cc :
mSanf> Objet : Re: Réf. : Re: very strange errors (no collection
found series)
mSanf> Hallo Meissa,
mSanf> can you send the part of your jsp with the iterate tag? This would
mSanf> help.
mSanf> Regards,
mSanf> Dirk
mSanf> ***************************************************************
mSanf>> Dirk,
mSanf>> I'm using tomcat 4.1.18 and i have asked tomcat user list before.
mSanf>> It seem like the problem is caused by a logic iterate tag ...
mSanf>> But till now, I haven't found the real cause.
mSanf>> Meissa
mSanf>> Dirk Markert <[EMAIL PROTECTED]>
mSanf>> 24/06/2003 08:45
mSanf>> Veuillez ripondre ` "Struts Users Mailing List"
mSanf>> Pour : "Struts Users Mailing List"
mSanf> <[EMAIL PROTECTED]>
mSanf>> cc :
mSanf>> Objet : Re: very strange errors (no collection found
mSanf> series)
mSanf>> Hallo Meissa,
mSanf>> what version of tomcat are you using. Maybe you should also ask
the
mSanf>> tomcat list?
mSanf>> Regards,
mSanf>> Dirk
mSanf>> ***************************************************************
mSanf>>> I'm having a very strange behaviour of my application.
mSanf>>> It has been tested in pre-production environnement and
mSanf>>> everything worked fine.
mSanf>>> When in production, it works but no fine at all !
mSanf>>> The application works well for about five or six days and
mSanf>>> when we try to access some pages, we get a no No collection found
mSanf>> exception.
mSanf>>> when we restart Tomcat(without making any change to the code)
mSanf> every
mSanf>> thing
mSanf>>> works fine again.
mSanf>>> here is an extract of the exception:
mSanf>>> javax.servlet.ServletException: No collection found
mSanf>>> at
mSanf>>>
mSanf>>
mSanf>
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:530)
mSanf>>> at
mSanf>>>
mSanf>>
mSanf>
org.apache.jsp.listParamVL_jsp._jspService(listParamVL_jsp.java:374)
mSanf>>> at
mSanf>>>
mSanf> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
mSanf>>> at
mSanf>> javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
mSanf>>> As you can see it, the probleme seems to come from the
mSanf>> listParamVL_jsp.
mSanf>>> when I open the generated servlet file, at line 374, I have the
mSanf>> code below
mSanf>>> :
mSanf>>> if (_jspxFactory != null)
mSanf>> _jspxFactory.releasePageContext(pageContext);
mSanf>>> I really don't know what to do to determine the bug origin.
mSanf>>> If someone has an idea or a suggestion, I would greatly
appreciate
mSanf>> it.
mSanf>>> Meissa
mSanf>>> L'integrite de ce message n'etant pas assuree sur internet,
mSanf> Natexis
mSanf>>> Banques Populaires ne peut etre tenu responsable de
mSanf>>> son contenu. Toute utilisation ou diffusion non autorisee est
mSanf>>> interdite. Si vous n'etes pas destinataire de ce message, merci
de
mSanf>> le
mSanf>>> detruire et d'avertir l'expediteur.
mSanf>>> The integrity of this message cannot be guaranteed
mSanf>>> on the Internet. Natexis Banques Populaires can not therefore be
mSanf>>> considered responsible for the contents.Any unauthorized use or
mSanf>> dissemination is prohibited.
mSanf>>> If you are not the intended recipient of this message, then
please
mSanf>> delete it and
mSanf>>> notify the sender.
mSanf>>
mSanf>
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mSanf> [EMAIL PROTECTED]
mSanf>> L'integrite de ce message n'etant pas assuree sur internet,
Natexis
mSanf>> Banques Populaires ne peut etre tenu responsable de
mSanf>> son contenu. Toute utilisation ou diffusion non autorisee est
mSanf>> interdite. Si vous n'etes pas destinataire de ce message, merci de
mSanf> le
mSanf>> detruire et d'avertir l'expediteur.
mSanf>> The integrity of this message cannot be guaranteed
mSanf>> on the Internet. Natexis Banques Populaires can not therefore be
mSanf>> considered responsible for the contents.Any unauthorized use or
mSanf> dissemination is prohibited.
mSanf>> If you are not the intended recipient of this message, then please
mSanf> delete it and
mSanf>> notify the sender.
mSanf>
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mSanf> To unsubscribe, e-mail: [EMAIL PROTECTED]
mSanf> For additional commands, e-mail:
[EMAIL PROTECTED]
mSanf> L'integrite de ce message n'etant pas assuree sur internet, Natexis
mSanf> Banques Populaires ne peut etre tenu responsable de
mSanf> son contenu. Toute utilisation ou diffusion non autorisee est
mSanf> interdite. Si vous n'etes pas destinataire de ce message, merci de
le
mSanf> detruire et d'avertir l'expediteur.
mSanf> The integrity of this message cannot be guaranteed
mSanf> on the Internet. Natexis Banques Populaires can not therefore be
mSanf> considered responsible for the contents.Any unauthorized use or
dissemination is prohibited.
mSanf> If you are not the intended recipient of this message, then please
delete it and
mSanf> notify the sender.
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
L'integrite de ce message n'etant pas assuree sur internet, Natexis
Banques Populaires ne peut etre tenu responsable de
son contenu. Toute utilisation ou diffusion non autorisee est
interdite. Si vous n'etes pas destinataire de ce message, merci de le
detruire et d'avertir l'expediteur.
The integrity of this message cannot be guaranteed
on the Internet. Natexis Banques Populaires can not therefore be
considered responsible for the contents.Any unauthorized use or dissemination is
prohibited.
If you are not the intended recipient of this message, then please delete it and
notify the sender.
