Nested ListView in wicket throwing IndexOutOfBoundsException -

i have nested listview in wicket reason throwing indexoutofboundsexception. here relevant markup:

<table>   <tr wicket:id="datarow">     <td wicket:id="datacell"><span wicket:id="datacontent"></span></td>   </tr> <table> 

and relevant code:

    listview<user> datarow = new listview<user>("datarow", new abstractreadonlymodel<list<user>>() {         private static final long serialversionuid = 1l;         @override         public list<user> getobject() {             ...             return getusers(itemoffset, c, filter, sc, isdescending );             // returns list<user> of row objects         }      }) {         private static final long serialversionuid = 1l;          @override         protected void populateitem(listitem<user> item) {             // list of <td>s             listview<string> datacell = new listview<string>("datacell",new abstractreadonlymodel<list<string>>() {                 private static final long serialversionuid = 1l;                  @override                 public list<string> getobject() {                     return getcolumnvalues(item.getmodelobject());                     // gets list of strings display user object                 }             }) {                 private static final long serialversionuid = 1l;                  @override                 protected void populateitem(listitem<string> stringitem) {                     label datacontent = new label("datacontent", stringitem.getmodel());                     datacontent.setrenderbodyonly(true);                     stringitem.add(datacontent);                 }             };             datacell.setreuseitems(true);             item.add(datacell);         }     };     datarow.setreuseitems(true);     add(datarow); 

no ajax refresh or has been done (yet), exception @ first rendering already:

unexpected runtimeexception  last cause: index: 10, size: 10 wicketmessage: exception in rendering component: [component id = datacontent]  stacktrace  root cause:  java.lang.indexoutofboundsexception: index: 10, size: 10  @ java.util.arraylist.rangecheck(arraylist.java:653)  @ java.util.arraylist.get(arraylist.java:429)  @ org.apache.wicket.markup.html.list.listitemmodel.getobject(listitemmodel.java:59)  @ org.apache.wicket.component.getdefaultmodelobject(component.java:1605)  @ org.apache.wicket.markup.html.list.listitem.getmodelobject(listitem.java:92)  @ myadmin.web.panels.tableviewpanel$3$1.getobject(tableviewpanel.java:156)  @ myadmin.web.panels.tableviewpanel$3$1.getobject(tableviewpanel.java:1)  @ org.apache.wicket.component.getdefaultmodelobject(component.java:1605)  @ org.apache.wicket.markup.html.list.listview.getmodelobject(listview.java:643)  @ org.apache.wicket.markup.html.list.listitemmodel.getobject(listitemmodel.java:59)  @ org.apache.wicket.component.getdefaultmodelobject(component.java:1605)  @ org.apache.wicket.component.getdefaultmodelobjectasstring(component.java:1633)  @ org.apache.wicket.markup.html.basic.label.oncomponenttagbody(label.java:131)  @ org.apache.wicket.markup.html.panel.defaultmarkupsourcingstrategy.oncomponenttagbody(defaultmarkupsourcingstrategy.java:71)  @ org.apache.wicket.component.internalrendercomponent(component.java:2529)  @ org.apache.wicket.markup.html.webcomponent.onrender(webcomponent.java:56)  @ org.apache.wicket.component.internalrender(component.java:2359)  @ org.apache.wicket.component.render(component.java:2287)  @ org.apache.wicket.markupcontainer.rendernext(markupcontainer.java:1392)  @ org.apache.wicket.markupcontainer.renderall(markupcontainer.java:1557)  @ org.apache.wicket.markupcontainer.rendercomponenttagbody(markupcontainer.java:1532)  @ org.apache.wicket.markupcontainer.oncomponenttagbody(markupcontainer.java:1487)  @ org.apache.wicket.markup.html.panel.defaultmarkupsourcingstrategy.oncomponenttagbody(defaultmarkupsourcingstrategy.java:71)  @ org.apache.wicket.component.internalrendercomponent(component.java:2529)  @ org.apache.wicket.markupcontainer.onrender(markupcontainer.java:1496)  @ org.apache.wicket.component.internalrender(component.java:2359)  @ org.apache.wicket.component.render(component.java:2287)  @ org.apache.wicket.markup.html.list.listview.renderitem(listview.java:584)  @ org.apache.wicket.markup.html.list.listview.renderchild(listview.java:573)  @ org.apache.wicket.markup.repeater.abstractrepeater.onrender(abstractrepeater.java:101)  @ org.apache.wicket.component.internalrender(component.java:2359)  @ org.apache.wicket.component.render(component.java:2287)  @ org.apache.wicket.markupcontainer.rendernext(markupcontainer.java:1392)  @ org.apache.wicket.markupcontainer.renderall(markupcontainer.java:1557)  @ org.apache.wicket.markupcontainer.rendercomponenttagbody(markupcontainer.java:1532)  @ org.apache.wicket.markupcontainer.oncomponenttagbody(markupcontainer.java:1487)  @ org.apache.wicket.markup.html.panel.defaultmarkupsourcingstrategy.oncomponenttagbody(defaultmarkupsourcingstrategy.java:71)  @ org.apache.wicket.component.internalrendercomponent(component.java:2529)  @ org.apache.wicket.markupcontainer.onrender(markupcontainer.java:1496)  @ org.apache.wicket.component.internalrender(component.java:2359) 

...

i don't see i'm doing wrong. appreciated.