getJSON to call a method in Struts action class for autocomplete

Question

I couldn't able to load my action class "search" method. I get the below error while typing inside my textbox with id paliName.

Error - GET http://localhost:8080/Newgen/searchName.html?term=a 404

struts.xml

<struts>
    <constant name="struts.action.extention" value="html" />
    
    <package name="json" namespace="/" extends="json-default">
        <action name="searchName" class="com.nexgen.web.PaliAction" method="search">
            <result type="json">
                <param name="root">jsonData</param>
            </result>
        </action>
    </package>
</struts>

register.jsp

<s:textfield id="paliName" name="paliName" label="Palindrome" maxlength="100"/>

// A $( document ).ready() block.
    $( document ).ready(function() {
        $("#paliName").autocomplete({
            source: function (request, response){
                $.getJSON('http://localhost:8080/Newgen/searchName.html?term=' + request.term, function(
                        data){
                            response($.map(data.names, function(value,key){
                                return{
                                    label: value,
                                    value: key
                                    };
                                }));
                    });
                },
                minLenght:1,
                delay: 100
            });
        
    });

PaliAction.java

public class PaliAction extends ActionSupport implements ModelDriven<Palindrome> {

    private static final long serialVersionUID = -6659925652584240539L;
    private Map<String, Object> jsonData = new HashMap<String, Object>();
    private Palindrome user = new Palindrome();
    private String term = "";
    
    public Palindrome getModel() {
        return user;
    }
    
    /**
     * To search for autocomplete.
     * @return String
     */
    public String search()
    {   
        jsonData.put("names", userDAO.searchName(term));
        return SUCCESS;
    }

    public Map<String, Object> getJsonData() {
        return jsonData;
    }

    public void setJsonData(Map<String, Object> jsonData) {
        this.jsonData = jsonData;
    }

    public String getTerm() {
        return term;
    }

    public void setTerm(String term) {
        this.term = term;
    }
    
}