Getting following error while gathering metrics from multiple services

[ychaydhari]

Hello,
When I started two services the exporter failed to gather metrics.

command line:-
-javaagent:"C:\Workspace\api\Service\opentelemetry-javaagent.jar" -Dotel.metrics.exporter=otlp -Dotel.exporter.otlp.metrics.endpoint=http://localhost:4317 -Dotel.traces.exporter=zipkin -Dotel.metrics.exemplar.filter=none -Dotel.service.name=admin_service

-javaagent:"C:\Workspace\MVIS_2.0\mvis\cm\api\ConnectionManagerService\opentelemetry-javaagent.jar" -Dotel.metrics.exporter=otlp -Dotel.exporter.otlp.metrics.endpoint=http://localhost:4317 -Dotel.traces.exporter=zipkin -Dotel.metrics.exemplar.filter=none -Dotel.service.name=cm_service

Initially, I'm getting metrics from both the services when I hit API of cm_service it throws an exception.

[ychaydhari]

Exception :-

2022-09-27T15:17:21.338+0530 info MetricsExporter {"kind": "exporter", "data_type": "metrics", "name": "logging", "#metrics": 20} 2022-09-27T15:17:21.839+0530 error prometheusexporter@v0.59.0/log.go:34 error gathering metrics: collected metric "http_server_active_requests" { label:<name:"http_flavor" value:"1.1" > label:<name:"http_host" value:"localhost:7171" > label:<name:"http_method" value:"GET" > label:<name:"http_scheme" value:"http" > label:<name:"job" value:"cm_service" > gauge:<value:-5 > } was collected before with the same name and label values {"kind": "exporter", "data_type": "metrics", "name": "prometheus"} github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusexporter.(*promLogger).Println github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusexporter@v0.59.0/log.go:34 github.com/prometheus/client_golang/prometheus/promhttp.HandlerForTransactional.func1 github.com/prometheus/client_golang@v1.13.0/prometheus/promhttp/http.go:139 net/http.HandlerFunc.ServeHTTP net/http/server.go:2084 net/http.(*ServeMux).ServeHTTP net/http/server.go:2462 go.opentelemetry.io/collector/config/confighttp.(*decompressor).wrap.func1 go.opentelemetry.io/collector@v0.59.0/config/confighttp/compression.go:162 net/http.HandlerFunc.ServeHTTP net/http/server.go:2084 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp.(*Handler).ServeHTTP go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp@v0.34.0/handler.go:204 go.opentelemetry.io/collector/config/confighttp.(*clientInfoHandler).ServeHTTP go.opentelemetry.io/collector@v0.59.0/config/confighttp/clientinfohandler.go:39 net/http.serverHandler.ServeHTTP net/http/server.go:2916 net/http.(*conn).serve net/http/server.go:1966

[ychaydhari]

Configure pipeline :-

service:
extensions: [health_check]
pipelines:
metrics:
receivers: [otlp]
processors: [batch]
exporters: [logging, prometheus]
traces:
receivers: [otlp]
processors: [batch]
exporters: [logging, zipkin]`

[laurit]

As this error seems to be reported by the collector it might be better to ask this question from the collector folks.

[ychaydhari]

yes, because I configuration to drop this http_server_active_requests metric but still getting these metrics.