validation - on action error message not showing on same page -

i have insert , view on same page. problem error message not showing

<action name="viewallcostings" class="volo.tms.costings.costings" method="viewallcostings">                   <result name="success">/costings/costings.jsp</result> </action>       <action name="addcosting" class="volo.tms.costings.costings">     <result name="input">/costings/costings.jsp</result>     <result name="success" type="chain">viewallcostings</result>     <result name="error" >/costings/costings.jsp</result> </action> 

and costings.jsp

<s:actionerror/>     <s:form action="addcosting" method="post">     <s:textfield label="costing type" name="costtype" required="true"/>     <s:textfield label="cost(rs.)" name="costrs" required="true"/>                <s:submit value="add" name="addcostbutton"/> </s:form>  <div class="wrapper">                <display:table id="txt" name="costinglist" pagesize="10" cellpadding="2px;" cellspacing="5px;" requesturi="">         <display:column property="costtype" title="cost type" sortable="true"></display:column>         <display:column property="costrs" title="cost(rs.)" sortable="true"></display:column>                    </display:table></div> 

and action class

 public string execute(){//used method insert data          arraylist costlist = new arraylist();         costlist.add(costtype);         costlist.add(costrs);          costlist.add(costid);          if (addcostdao.inserteditcostdetails(costlist)) {             return success;         } else {             addactionerror("employee name exists !");             return error;         }}  public string viewallcostings(){     //used view data using list     return success } 

did not getting error message. tried not getting solution

you might have validation errors results input, action not executed , message isn't set. if want prevent action validation can configure action exclude method validation interceptor. far validation interceptor implements method filter interceptor can in struts.xml. or add @skipvalidation annotation on method.

@skipvalidation public string execute(){//used method insert data