我有一个奇怪的问题，我使用的是Tomcat 8.0.33。我像这样编辑tomcat-user.xml：
<tomcat-users xmlns="http://tomcat.apache.org/xml"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://tomcat.apache.org/xml tomcat-users.xsd"
version="1.0">
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="manager-jmx"/>
<role rolename="manager-status"/>
<role rolename="admin-gui"/>
<role rolename="admin-script"/>
<user username="xxx" password="xxx" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-gui,admin-script"/>
</tomcat-users>
我可以使用＆＃34; admin＆＃34;登录主机管理器页面帐户，但当我去＆＃34;管理app＆＃34;页面并输入相同的用户名和密码，它显示（在firefox 44中）：
The connection was reset
The connection to the server was reset while the page was loading.
The site could be temporarily unavailable or too busy. Try again in a few moments.
If you are unable to load any pages, check your computer's network connection.
If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.
我在亚马逊云服务器中部署tomcat服务器，我也在自己的服务器中部署了相同的服务器，一切都可以正常工作。