backnero commented on issue #2828:
URL: https://github.com/apache/apisix/issues/2828#issuecomment-732620943
when i enable config 'enable_debug'
```
020/11/24 03:19:08 [error] 17#17: *6274 failed to run log_by_lua*:
/usr/local/apisix/apisix/core/response.lua:128: headers have already been sent
stack traceback:
[C]: in function 'error'
/usr/local/apisix/apisix/core/response.lua:96: in function
'set_header'
/usr/local/apisix/apisix/core/response.lua:128: in function
'set_header'
/usr/local/apisix/apisix/plugin.lua:227: in function 'filter'
/usr/local/apisix/apisix/init.lua:597: in function 'common_phase'
/usr/local/apisix/apisix/init.lua:679: in function 'http_log_phase'
log_by_lua(nginx.conf:248):2: in main chunk while logging request,
client: 127.0.0.1, server: , request: "POST /account/captcha HTTP/1.1",
upstream: "http://172.20.255.25:8080/v1/account/captcha";, host: "t.com"
2020/11/24 03:19:10 [error] 16#16: *6419 failed to run body_filter_by_lua*:
/usr/local/apisix/apisix/core/response.lua:128: headers have already been sent
stack traceback:
[C]: in function 'error'
/usr/local/apisix/apisix/core/response.lua:96: in function
'set_header'
/usr/local/apisix/apisix/core/response.lua:128: in function
'set_header'
/usr/local/apisix/apisix/plugin.lua:227: in function 'filter'
/usr/local/apisix/apisix/init.lua:597: in function 'common_phase'
/usr/local/apisix/apisix/init.lua:619: in function
'http_body_filter_phase'
body_filter_by_lua:2: in main chunk while sending to client, client:
127.0.0.1, server: , request: "GET /account/rsa HTTP/1.1", upstream:
"http://172.20.255.25:8080/v1/account/rsa";, host: "t.com", referrer:
"https://t.com/";
```
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