502 Proxy Error The proxy server received an invalid response from an upstream server

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /wpsp/.

Reason: Error reading from remote server

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Apache/2.2.15 (CentOS) Server at www.xaut.edu.cn Port 80

 

解决方法：
重启Apache，再重启Tomcat即可。