Error log with metricsDesc as unsupported value type

[santi-eidu]

I'm submitting a ...

• [X] bug report
• [ ] feature request

What is the current behavior?

After update the oracle exporter version, metricsDesc shows always the message "unsupported value type"

level=debug metricsDesc="unsupported value type"

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem

$ docker run -d --name oracle -p 1521:1521 wnameless/oracle-xe-11g-r2:18.04-apex
$ docker run -d --name oracledb_exporter -v /opt/oracle_exporter/metrics/default-metrics.toml:/opt/oracle_exporter/metrics/default-metrics.toml --link=oracle -p 9161:9161 -e DATA_SOURCE_NAME=system/oracle@oracle/xe ghcr.io/iamseth/oracledb_exporter:0.4.3 --log.level debug --default.metrics /opt/oracle_exporter/metrics/default-metrics.toml --web.listen-address 0.0.0.0:9161 --scrape.interval 30s

What is the expected behavior?

metricsDesc with the correct string from the configuration.

level=debug metricsDesc="{"value_1":"Simple example returning always 1."}"

What is the motivation / use case for changing the behavior?

Loggin of Metric Description.

Please tell us about your environment:

Custom metric:

$ cat /opt/oracle_exporter/metrics/default-metrics.toml

# Simple metric used by molecule tests
[[metric]]
context = "test"
request = "SELECT 1 as value_1 FROM DUAL"
metricsdesc = { value_1 = "Simple example returning always 1." }

Debug log:

ts=2023-04-14T10:59:38.227Z caller=main.go:278 level=debug context=test
ts=2023-04-14T10:59:38.227Z caller=main.go:279 level=debug metricsType="unsupported value type"
ts=2023-04-14T10:59:38.227Z caller=main.go:280 level=debug metricsBuckets="unsupported value type"
ts=2023-04-14T10:59:38.227Z caller=main.go:281 level=debug labels="unsupported value type"
ts=2023-04-14T10:59:38.227Z caller=main.go:282 level=debug fieldToAppend=
ts=2023-04-14T10:59:38.227Z caller=main.go:283 level=debug ignoreZeroResult=false
ts=2023-04-14T10:59:38.227Z caller=main.go:284 level=debug request="SELECT 1 as value_1, 2 as value_2 FROM DUAL"
ts=2023-04-14T10:59:38.227Z caller=main.go:338 level=debug msg="Calling function ScrapeGenericValues()"
ts=2023-04-14T10:59:38.227Z caller=main.go:438 level=debug msg="Calling function GeneratePrometheusMetrics()"
ts=2023-04-14T10:59:38.228Z caller=main.go:276 level=debug msg="About to scrape metric"
ts=2023-04-14T10:59:38.229Z caller=main.go:277 level=debug metricsDesc="unsupported value type"

Version: 0.4.3

[santi-eidu]

With errors there is the same problem:

ts=2023-04-19T12:03:26.894Z caller=main.go:308 level=error msg="Error scraping for" context=test metricsDesc="unsupported value type" since=15m37.979415606s err="Oracle query timed out"

The timeout error was forced to check the log.