问题排查：The requested URL /test/index.jsp was not found on this server

问题描述

添加一个新模块，部署在服务器上。服务器上还部署有其他模块且访问正常，新模块和其他模块共用同一个域名。服务部署之后，请求如下：
http://my.domain.com/test/index.jsp
返回

Not Found

The requested URL /test/index.jsp was not found on this server.

解决步骤

登入服务器，查看tomcat的webapp目录下，发现有test目录和/test/index.jsp文件。
查看/tomcat/conf/server.xml中connector的配置：

    <Connector executor="tomcatThreadPool"
               port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />

本地访问尝试：

http://localhost:8080/test/index.jsp 正常
http://localhost:80/test/index.jsp Not Found
http://my.domain.com:8080/test/index.jsp 正常
http://my.domain.com:80/test/index.jsp Not Found
得出结论，端口号与模块匹配有限制。

http服务使用的是apache，网上搜索关于apache多端口多目录的配置方法。找到配置文件后参照之前模块的格式进行配置。
/cong/httpd.conf 文件中，确保这句Include conf/extra/httpd-vhosts.conf没有被注释掉。
然后打开/conf/extra/httpd-vhosts.conf 文件查看配置，参照之前的配置，如下：

 <VirtualHost *:80>
    ServerName my.domain.com
    ProxyRequests Off

    <Location /test>
       ProxyPass balancer://test/
       ProxyPassReverse balancer://test/
    </Location>

    <Proxy balancer://test>
        Order Deny,Allow
        Allow from all
        BalancerMember http://127.0.0.1:8080/test
        ProxySet lbmethod=byrequests
    </Proxy>
</VirtualHost>

重启apache服务器

./apachectl restart
返回：
httpd not running, trying to start
(13)Permission denied: make_sock: could not bind to address [::]:80
(13)Permission denied: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs

命令： sudo ./apachectl restart
返回：
(98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs

命令：sudo killall httpd
sudo：killall：找不到命令

ps axu| grep httpd
sudo kill -9 365 355 367 383 398 //删除这些httpd进程
sudo ./apachectl start 启动成功

访问 http://my.domain.com/test/index.jsp，数据正常