prometheus use proxy url: invalid metric type "info"

[liuxuzxx]

RocketMQ Version: 5.3.2

When using prometheus to directly obtain rocketmq 5 indicators, everything is normal, but when configuring proxy_url, the following error occurs: invalid metric type "info"

I saw the monitoring data spit out by rocketmq as follows:

# TYPE target info
# HELP target Target metadata
target_info{} 1
# TYPE otel_scope_info info
# HELP otel_scope_info Scope metadata
otel_scope_info{otel_scope_name="broker-meter"} 1
......omitted

I looked at the source code of prometheus and found that it would parse #TYPE and then see that it was "info", so it reported an error.

I used curl to request RocketMQ's /metrics directly or through the proxy --proxy xxxx http://xxxxx:5557/metrics. I carefully compared the message. Except for the header, there was no difference in the entire http response body.

[liuxuzxx]

When I use the promtool tool to detect the indicators of RocketMQ 5, the results are as follows

 linux > curl -s http://172.16.1.11:5557/metrics | ./promtool check metrics          
error while linting: text format parsing error in line 1: unknown metric type "info"