java.io.IOException: write beyond end of stream OR java.lang

我不确定为什么会出现此错误。我只是用yahoo YUI实现了一个简单的AJAX搜索。请注意，我确实编写了getoutputstream以获得一个错误，然后当我进行printwritter时，我得到了第一个错误。

java.lang.IllegalStateException: getOutputStream() has already been called!**
        at com.documentum.web.servlet.CompressingResponseWrapper.getWriter(CompressingResponseWrapper.java:119)
        at jsp_servlet._._jspService(__peoplesearch.java:131)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
java.io.IOException: write beyond end of stream
        at java.util.zip.DeflaterOutputStream.write(DeflaterOutputStream.java:104)
        at java.util.zip.GZIPOutputStream.write(GZIPOutputStream.java:72)

雅虎唯...

(function() {
    YAHOO.namespace('NameSearch');
    YAHOO.NameSearch = function(element) {
        var ColumnDefs = [
                 {key:"age",label: "Age", sortable:true, resizeable:true},
                 {key:"height", label: "Persons Height", sortable:true, resizeable:true},
                 {key:"name",label: "First Name", sortable:true, resizeable:true}

        ];  
        var personDataSource = new YAHOO.util.DataSource('/nameSearch.jsp?');
        personDataSource.responseType = YAHOO.util.DataSource.TYPE_JSON;
        personDataSource.responseSchema = {
            resultsList : 'PeopleSearch',
            fields : [ 'age', 'height', 'name' ]
        };

        YAHOO.NameSearch.superclass.constructor.call(this,
                element, ColumnDefs, personDataSource );
    };
    var PersonSearch = YAHOO.NameSearch;
    YAHOO.lang.extend(NameSearch, YAHOO.widget.DataTable, {
        refresh : function(parameters) {
            var successHandler = function() {
                var sortedBy = this.getState().sortedBy;
                this.onDataReturnReplaceRows.apply(this, arguments);

数据。。。。。。。。。。

<%
    String pKey = request.getParameter("PrimaryKey");
    String personAge = request.getParameter("AGE");
    String firstName = request.getParameter("Name");

    List<HashMap<String, Object>> personList = PersonDAO.getPersonDetails(pKey, personAge, firstName);
    response.setContentType("application/json");
    ObjectMapper mapper = new ObjectMapper();
    Map<String, Object> json = new HashMap<String, Object>();
    List<Map<String, Object>> array = new ArrayList<Map<String, Object>>();
    Map<String, Object> node;

    for (int i = 0; i < personList.size(); i++) {
        node = new HashMap<String, Object>();
        HashMap<String, Object> person = personList.get(i);
        {
            node.put("age", (String) person.get("age_key"));
            node.put("height", (String) person.get("height_key"));
            node.put("name", (String) person.get("name_key"));
        }
        array.add(node);
    }
    json.put("PeopleSearch", array);
    mapper.writeValue(response.getOutputStream(), json);
%>