nginx报502修复日志

参考：https://www.baidu.com/link?url=PGd7mgvalnQp0MOVZTyDJIvr6_eJn1hmPlmsLpdj2vH6w3FzMt3pZEd_MKpoiqX1OFhunNSb8fTORaoCL9jtD_&wd=&eqid=b8cf16fb00037acd000000055b8cff12