我正在运行Travis构建，并且在构建mysql：5.7.27 docker映像时失败。Dockerfile运行apt-get update，然后出现错误W: Failed to fetch http://deb.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages 404 Not Found。
使用curl我可以看到它正在重定向，但是重定向到URL的结果是404。有人看到这种行为并且有补救措施吗？在debian进行更改之前，它基本上是不可修复的吗？
? ms git:(develop) curl --head http://deb.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages
HTTP/1.1 302 Found
Date: Tue, 26 Mar 2019 16:03:04 GMT
Server: Apache
X-Content-Type-Options: nosniff
X-Frame-Options: sameorigin
Referrer-Policy: no-referrer
X-Xss-Protection: 1
Location: http://cdn-fastly.deb.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages
Content-Type: text/html; charset=iso-8859-1
? ms git:(develop) curl --head http://cdn-fastly.deb.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages
HTTP/1.1 404 Not Found
Server: Apache
X-Content-Type-Options: nosniff
X-Frame-Options: sameorigin
Referrer-Policy: no-referrer
X-Xss-Protection: 1
Content-Type: text/html; charset=iso-8859-1
Via: 1.1 varnish
Content-Length: 316
Accept-Ranges: bytes
Date: Tue, 26 Mar …