wasphin commented on code in PR #2899:
URL: https://github.com/apache/brpc/pull/2899#discussion_r1966808669
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src/brpc/builtin/prometheus_metrics_service.cpp:
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@@ -102,9 +103,14 @@ bool PrometheusMetricsDumper::dump(const std::string& name,
auto metrics_name = GetMetricsName(name);
- *_os << "# HELP " << metrics_name << '\n'
- << "# TYPE " << metrics_name << " gauge" << '\n'
- << name << " " << desc << '\n';
+ // To meet specification of prometheus metric, there should be only
+ // one TYPE field for the same metric name.
+ if (metrics_name.as_string() != _last_metric_name) {
Review Comment:
Simply ignoring metrics that are duplicates of the previous ones does not
completely solve the problem. If the metrics themselves are repetitive, perhaps
we should try to identify and address the root cause; if it's just a matter of
duplicate names, consider fixing the metrics name.
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