Get 503 sometimes when viewing https://zh.wikipedia.org/wiki/%E5%85%83%E6%99%BA%E5%A4%A7%E5%AD%B8
Request from xxx via cp1087 cp1087, Varnish XID 229723203 Error: 503, Backend fetch failed at Thu, 27 Jun 2019 04:41:03 GMT
Get 503 sometimes when viewing https://zh.wikipedia.org/wiki/%E5%85%83%E6%99%BA%E5%A4%A7%E5%AD%B8
Request from xxx via cp1087 cp1087, Varnish XID 229723203 Error: 503, Backend fetch failed at Thu, 27 Jun 2019 04:41:03 GMT
This 503 error was due to network issues in eqiad as mentioned by @Marostegui and @Antigng.