Unable to use custom metrics configuration file

[LuvlinLiu]

I'm submitting a ...

• bug report
• feature request

Whether use a custom metrics configuration file or the default one, an error will be reported.

appuser@pro01-oc-odb-exporter-7c46dd64b-g7rpx:/$ ./oracledb_exporter --custom.metrics="pro01-oc-odb-metrics.toml"
ts=2024-04-19T03:01:47.681Z caller=collector.go:352 level=info pro01-oc-odb-metrics.toml="has been changed. Reloading metrics..."
panic: assignment to entry in nil map

goroutine 11 [running]:
github.com/iamseth/oracledb_exporter/collector.(*Exporter).checkIfMetricsChanged(0xc0001de000)
/go/src/oracledb_exporter/collector/collector.go:353 +0x3e5
github.com/iamseth/oracledb_exporter/collector.(*Exporter).scrape(0xc0001de000, 0xc00007e2a0)
/go/src/oracledb_exporter/collector/collector.go:268 +0x585
github.com/iamseth/oracledb_exporter/collector.(*Exporter).Collect(0xc0001de000, 0x0?)
/go/src/oracledb_exporter/collector/collector.go:180 +0xf4
github.com/iamseth/oracledb_exporter/collector.(*Exporter).Describe(0x0?, 0xc0000729c0)
/go/src/oracledb_exporter/collector/collector.go:158 +0xc7
github.com/prometheus/client_golang/prometheus.(*Registry).Register.func1()
/go/pkg/mod/github.com/prometheus/client_golang@v1.14.0/prometheus/registry.go:280 +0x2b
created by github.com/prometheus/client_golang/prometheus.(*Registry).Register
/go/pkg/mod/github.com/prometheus/client_golang@v1.14.0/prometheus/registry.go:279 +0x19b
appuser@pro01-oc-odb-exporter-7c46dd64b-g7rpx:/$ ./oracledb_exporter --custom.metrics="default-metrics.toml"
ts=2024-04-19T03:03:28.900Z caller=collector.go:352 level=info default-metrics.toml="has been changed. Reloading metrics..."
panic: assignment to entry in nil map

goroutine 39 [running]:
github.com/iamseth/oracledb_exporter/collector.(*Exporter).checkIfMetricsChanged(0xc00026a000)
/go/src/oracledb_exporter/collector/collector.go:353 +0x3e5
github.com/iamseth/oracledb_exporter/collector.(*Exporter).scrape(0xc00026a000, 0xc000262180)
/go/src/oracledb_exporter/collector/collector.go:268 +0x585
github.com/iamseth/oracledb_exporter/collector.(*Exporter).Collect(0xc00026a000, 0x0?)
/go/src/oracledb_exporter/collector/collector.go:180 +0xf4
github.com/iamseth/oracledb_exporter/collector.(*Exporter).Describe(0x0?, 0xc0002046c0)
/go/src/oracledb_exporter/collector/collector.go:158 +0xc7
github.com/prometheus/client_golang/prometheus.(*Registry).Register.func1()
/go/pkg/mod/github.com/prometheus/client_golang@v1.14.0/prometheus/registry.go:280 +0x2b
created by github.com/prometheus/client_golang/prometheus.(*Registry).Register
/go/pkg/mod/github.com/prometheus/client_golang@v1.14.0/prometheus/registry.go:279 +0x19b
appuser@pro01-oc-odb-exporter-7c46dd64b-g7rpx:/$

Version: 0.5.0

[LuvlinLiu]

I can start the exporter normally using the following command, but the metrics inside are still the default ones and no new ones are added.

appuser@pro01-oc-odb-exporter-7c46dd64b-g7rpx:/$ ./oracledb_exporter --default.metrics="pro01-oc-odb-metrics.toml"
ts=2024-04-19T03:07:36.636Z caller=collector.go:313 level=error Errorscrapingfor=wait_time _="unsupported value type" 60.316846ms=:
ts=2024-04-19T03:07:36.650Z caller=collector.go:313 level=error Errorscrapingfor=resource _="unsupported value type" 74.23198ms=:
ts=2024-04-19T03:07:36.676Z caller=main.go:69 level=info msg="Starting oracledb_exporter" version="(version=, branch=, revision=unknown)"
ts=2024-04-19T03:07:36.676Z caller=main.go:70 level=info msg="Build context" build="(go=go1.19.9, platform=linux/amd64, user=, date=, tags=unknown)"
ts=2024-04-19T03:07:36.677Z caller=main.go:71 level=info msg="Collect from: " metricPath=/metrics
ts=2024-04-19T03:07:36.677Z caller=tls_config.go:232 level=info msg="Listening on" address=[::]:9161
ts=2024-04-19T03:07:36.677Z caller=tls_config.go:235 level=info msg="TLS is disabled." http2=false address=[::]:9161
ts=2024-04-19T03:07:43.697Z caller=collector.go:313 level=error Errorscrapingfor=wait_time _="unsupported value type" 46.857195ms=:
ts=2024-04-19T03:07:43.714Z caller=collector.go:313 level=error Errorscrapingfor=resource _="unsupported value type" 63.959155ms=: