Salut à tous.
N'ayant pas trouvé ma réponse dans les précédents posts sur le sujet je post:

Mon erreur est comme le titre l'indique "Cannot find bean under name" pour une collection d'un <html:options> dans une jsp.

Voici les codes qui conviennent:

Mon action:
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List<Contact> listeContacts;
List<Resultat> listeResultats;
List<Nature> listeNatures;
List<Affaire> listeAffaires;
 
//ces deux listes sont toujours remplis ainsi
listeNatures = natureBusiness.getAll();
listeResultats = resultatBusiness.getAll();	
 
//ces deux la sont remplis soit à vide comme ceci
listeContacts = new ArrayList<Contact>();
listeAffaires = new ArrayList<Affaire>();
//soit comme ceci
listeAffaires = affaireBusiness.getAllForContact(contactId);
listeContacts = contactBusiness.getAllForAffaire(affaireId);
 
//je fini mon action en envoyant les listes à ma page jsp
request.setAttribute("listeContacts", listeContacts);
request.setAttribute("listeNatures", listeNatures);
request.setAttribute("listeResultats", listeResultats);
request.setAttribute("listeAffaires", listeAffaires);
 
//suivi du forward sur ma page
return mapping.findForward(SUCCESS);
Ma jsp:
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<html:select property="contact.contactid" styleId="comboContact" >
	<html:options collection="listeContacts" property="contactid" labelProperty="contactnom" />
</html:select>
 
<html:select property="affaire.affaireid" >
	<html:options collection="listeAffaires" property="affaireid" labelProperty="affairenom" />
</html:select>
 
<html:select property="nature.natureid">
	<html:options collection="listeNatures" property="natureid" labelProperty="naturenom" />
</html:select>
 
<html:select property="resultat.resultatid">
	<html:options collection="listeResultats" property="resultatid" labelProperty="resultatnom" />
</html:select>
struts-config:
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<action path="/evenement" name="evenementForm"
	parameter="dispatch" scope="session" validate="false"
	type="com.infotel.grc.action.EvenementAction" >
	<forward name="success" path=".evenement.info"/>
	<forward name="notIdentified" path=".login" redirect="false" />
	<forward name="evenements" path=".evenement" />
</action>
Voila l'erreur vient de listeContacts uniquement.
Je vous ai mis toutes mes listes pour que vous voyez. J'ai seulement la listeContacts qui me fait cet erreur et le pire, c'est qu'elle est bien rempli et qu'elle s'affiche bien dans ma combo box et mon appli continue à tourner sans problème. Aucune erreur dans l'action rien...

Pour finir voici la trace:
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ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
javax.servlet.jsp.JspException: Cannot find bean under name listeAffaires
	at org.apache.struts.taglib.html.OptionsTag.getIterator(OptionsTag.java:377)
	at org.apache.struts.taglib.html.OptionsTag.doEndTag(OptionsTag.java:188)
	at org.apache.jsp.page.detailsEvenement_jsp._jspx_meth_html_options_1(detailsEvenement_jsp.java:1048)
	at org.apache.jsp.page.detailsEvenement_jsp._jspx_meth_html_select_1(detailsEvenement_jsp.java:1016)
	at org.apache.jsp.page.detailsEvenement_jsp._jspx_meth_logic_notPresent_0(detailsEvenement_jsp.java:980)
	at org.apache.jsp.page.detailsEvenement_jsp._jspService(detailsEvenement_jsp.java:364)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
	at org.apache.jasper.runtime.PageContextImpl.doInclude(PageContextImpl.java:631)
	at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:625)
	at sun.reflect.GeneratedMethodAccessor1385.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:129)
	at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:152)
	at org.apache.struts.tiles.taglib.InsertTag.doInclude(InsertTag.java:764)
	at org.apache.struts.tiles.taglib.InsertTag$InsertHandler.doEndTag(InsertTag.java:896)
	at org.apache.struts.tiles.taglib.InsertTag.doEndTag(InsertTag.java:465)
	at org.apache.jsp.layout_main_jsp._jspx_meth_tile_insert_3(layout_main_jsp.java:241)
	at org.apache.jsp.layout_main_jsp._jspService(layout_main_jsp.java:139)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at org.apache.struts.action.RequestProcessor.doInclude(RequestProcessor.java:1105)
	at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:292)
	at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:271)
	at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:332)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:232)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
	at java.lang.Thread.run(Unknown Source)
15:19:44,627 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
javax.servlet.jsp.JspException: Cannot find bean under name listeAffaires
	at org.apache.struts.taglib.html.OptionsTag.getIterator(OptionsTag.java:377)
	at org.apache.struts.taglib.html.OptionsTag.doEndTag(OptionsTag.java:188)
	at org.apache.jsp.page.detailsEvenement_jsp._jspx_meth_html_options_1(detailsEvenement_jsp.java:1048)
	at org.apache.jsp.page.detailsEvenement_jsp._jspx_meth_html_select_1(detailsEvenement_jsp.java:1016)
	at org.apache.jsp.page.detailsEvenement_jsp._jspx_meth_logic_notPresent_0(detailsEvenement_jsp.java:980)
	at org.apache.jsp.page.detailsEvenement_jsp._jspService(detailsEvenement_jsp.java:364)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
	at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:602)
	at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:138)
	at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:152)
	at org.apache.struts.tiles.taglib.InsertTag.doInclude(InsertTag.java:764)
	at org.apache.struts.tiles.taglib.InsertTag$InsertHandler.doEndTag(InsertTag.java:896)
	at org.apache.struts.tiles.taglib.InsertTag.doEndTag(InsertTag.java:465)
	at org.apache.jsp.layout_main_jsp._jspx_meth_tile_insert_3(layout_main_jsp.java:241)
	at org.apache.jsp.layout_main_jsp._jspService(layout_main_jsp.java:139)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at org.apache.struts.action.RequestProcessor.doInclude(RequestProcessor.java:1105)
	at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:292)
	at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:271)
	at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:332)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:232)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
	at java.lang.Thread.run(Unknown Source)
15:19:44,642 ERROR [InsertTag] ServletException in '/page/detailsEvenement.jsp': Cannot find bean under name listeAffaires
org.apache.jasper.JasperException: Cannot find bean under name listeAffaires
	at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
	at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:602)
	at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:138)
	at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:152)
	at org.apache.struts.tiles.taglib.InsertTag.doInclude(InsertTag.java:764)
	at org.apache.struts.tiles.taglib.InsertTag$InsertHandler.doEndTag(InsertTag.java:896)
	at org.apache.struts.tiles.taglib.InsertTag.doEndTag(InsertTag.java:465)
	at org.apache.jsp.layout_main_jsp._jspx_meth_tile_insert_3(layout_main_jsp.java:241)
	at org.apache.jsp.layout_main_jsp._jspService(layout_main_jsp.java:139)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at org.apache.struts.action.RequestProcessor.doInclude(RequestProcessor.java:1105)
	at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:292)
	at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:271)
	at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:332)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:232)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
	at java.lang.Thread.run(Unknown Source)
Merci d'avance!