java net :: ERR_TOO_MANY_REDIRECTS并显示任何URL的空白页面

Question

我是Java的新手，似乎我的Servlet中出现了问题，因为我在chrome浏览器中不断获取net::ERR_TOO_MANY_REDIRECTS，而且我在浏览器中输入的任何URL都显示空白页。

以下是代码：

的web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:web="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
  <display-name>My Application</display-name>

    <session-config>
        <session-timeout>30</session-timeout>
        <cookie-config>
            <name>mysessionid</name>
            <http-only>true</http-only>
        </cookie-config>
    </session-config>
</web-app>

HomeServlet.xml

@WebServlet("/")
public final class HomeServlet extends HttpServlet {

    private HttpSession session = null;

    @Override
    public void doGet(HttpServletRequest request,
                      HttpServletResponse response)
      throws IOException, ServletException {

        session = request.getSession(false);
        System.out.println("session::: "+ session);
        if(session != null && !session.isNew()) {
            System.out.println("inside session only!");
            response.sendRedirect("index.html");
        } else {
            something(request, response);

        }


    }



    private String something(HttpServletRequest request, HttpServletResponse response) throws IOException {

    if(accessToken != null) {
        session = request.getSession();
        response.sendRedirect("index.html");
    }


} 

请告诉我上面出了什么问题。