这对我帮助很大： http://blog.somepixels.net/en/502-proxy-error-uploading-from-apache -mod_proxy-to-tomcat-7 /

基本上在我的server.xml中我设置为：

Basically in my server.xml I set it as:

<Connector port="8080" protocol="HTTP/1.1" URIEncoding="UTF-8"
       connectionUploadTimeout="36000000" disableUploadTimeout="false"
       connectionTimeout="60000" redirectPort="8443" />