为什么volley在请求标头中有重复的Cookie？

Question

我按如下方式定义一个截击请求，但有时我无法从服务器获取正确的数据（在我刚登录后），所以我使用Fiddler来查看请求，它看到请求头中有两个Cookie部分，因此服务器将其视为访客标识，并返回错误的数据。所以为什么 那里有两个Cookie部分？

public class JsonArrayPostRequestWithCookie extends Request<JSONArray> {
    private static final String TAG = "tag";
    public static final String Cookie = "Cookie";
    private Map<String, String> mMap;
    private Response.Listener<JSONArray> mListener;
    private Map<String, String> mSendHeader=new HashMap<String, String>();

    public JsonArrayPostRequestWithCookie(String url, Response.Listener<JSONArray> listener, Response.ErrorListener errorListener, Map<String, String> map, String cookie) {
        super(Method.POST, url, errorListener);
        mListener = listener;
        mMap = map;
        setSendCookie(cookie);
    }

    @Override
    protected Map<String, String> getParams() throws AuthFailureError {
        return mMap;
    }

    @Override
    protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
        try {
            String jsonString =
                    new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            JSONArray jsonarray = new JSONArray(jsonString);

            return Response.success(jsonarray,
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } catch (JSONException je) {
            return Response.error(new ParseError(je));
        }
    }

    @Override
    protected void deliverResponse(JSONArray response) {
        mListener.onResponse(response);
    }

    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String, String> headers = super.getHeaders();
        if (headers == null
                || headers.equals(Collections.emptyMap())) {
                headers = mSendHeader;
        }else{
                headers.remove(Cookie);
                headers.putAll(mSendHeader);
        }
        return headers;
    }

    private void setSendCookie(String cookie){
        if(TextUtils.isEmpty(cookie)){
            return;
        }
        mSendHeader.put(Cookie, cookie);
    }
}

请求标头像这样enter image description here，这很奇怪，为什么两个相同的Cookie部分在这里？

PS：这是我如何使用它：

`       map.put("vid", "1");
        map.put("parent", "0");
        map.put("maxdepth", "3");
        String cookie = "";
        if(Constants.logged){
            cookie = StringUtil.getSessionMsg();
        }
        JsonArrayPostRequestWithCookie getReq = new JsonArrayPostRequestWithCookie(RequestUrlProvider.ALL_MSG_PATH, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {

            }
        }, new Response.ErrorListener() {

        }, map, cookie);
        getReq.setRetryPolicy(new DefaultRetryPolicy(10000, 0, 1.0f));
        getReq.setShouldCache(false);
        NYiportalApplication.mReqQue.add(getReq);