tokers commented on issue #5512:
URL: https://github.com/apache/apisix/issues/5512#issuecomment-970088061
> here is my test:
>
> ```
> {
> "server_protocol": "HTTP/1.1",
> "@timestamp": "2021-11-16T12:28:39+08:00",
> "upstream_bytes_received": "528",
> "server_name": "_",
> "upstream_http_content_type": "application/json",
> "upstream_status": "200",
> "request_completion": "OK",
> "body_bytes_sent": "298",
> "upstream_addr": "198.18.2.225:80",
> "msec": "1637036919.270",
> "server_port": "9080",
> "route_id": "1",
> "upstream_uri": "",
> "request_method": "GET",
> "request_time": 0.426,
> "status": 200,
> "upstream_response_time": 0.426,
> "upstream_header_time": 0.426,
> "upstream_connect_time": 0.001,
> "upstream_scheme": "http",
> "bytes_sent": 526,
> "realip_remote_addr": "127.0.0.1",
> "remote_addr": "127.0.0.1",
> "host": "127.0.0.1",
> "uri": "/get",
> "http_user_agent": "curl/7.64.1",
> "request_uri": "/get",
> "request_length": 81,
> "upstream_http_content_length": "298",
> "scheme": "http",
> "upstream_host": "127.0.0.1:9080"
> }
> ```
>
> same as you, you can see that some of the data is not normal.
>
> I don't know why `request_time` , `upstream_response_time` and
`upstream_connect_time` are 0 in your case.
>
> however, `request_time` and `upstream_response_time` may not be accurate,
see
https://stackoverflow.com/questions/53978695/how-can-request-time-be-less-than-upstream-response-time-in-nginx
and #5146
>
> if you want to get exact `upstream_response_time `, take a look at:
[openresty/openresty#206
(comment)](https://github.com/openresty/openresty/issues/206#issuecomment-260101217)
>
> these variables are not inherently accurate, I don't think this is a bug
in the kafka-logger plugin, you need to do some calculations, like:
>
>
https://github.com/apache/apisix/blob/718eb4b21efb2e640939f864441c5e84b7c46cad/apisix/plugins/prometheus/exporter.lua#L147-L164
Which some fields are abnormal?
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