spacewander commented on issue #4489:
URL: https://github.com/apache/apisix/issues/4489#issuecomment-869522494
Can't be reproduced with 2.6:
```
$ curl http://127.0.0.1:9080/ -i
HTTP/1.1 502 Bad Gateway
Date: Mon, 28 Jun 2021 09:19:33 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Server: APISIX/2.6
X-APISIX-Upstream-Status: 502
Custom-Header-Name: 4979675b-3ca8-424f-8fa2-2c96b96b229c
w
```
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