fix for panic in prometheus.exporter.snmp from the recent version upgrade (#900)

Signed-off-by: erikbaranowski <39704712+erikbaranowski@users.noreply.github.com>

Author: erikbaranowski

CHANGELOG.md

@@ -24,6 +24,9 @@ Main (unreleased)
 
 ### Bugfixes
 
+- Fix panic for `prometheus.exporter.snmp` introduced in v1.1 with a version upgrade.
+  This was due to an uninitialized new metric for the exporter. (@erikbaranowski)
+
 - Fix panic when component ID contains `/` in `otelcomponent.MustNewType(ID)`.(@qclaogui)
 
 - Fixed an issue with `prometheus.scrape` in which targets that move from one

internal/static/integrations/snmp_exporter/snmp_exporter.go

@@ -155,6 +155,13 @@ func NewSNMPMetrics(reg prometheus.Registerer) collector.Metrics {
 				Help:      "Number of SNMP packet retries.",
 			},
 		),
+		SNMPInflight: promauto.NewGauge(
+			prometheus.GaugeOpts{
+				Namespace: namespace,
+				Name:      "request_in_flight",
+				Help:      "Current number of SNMP scrapes being requested.",
+			},
+		),
 	}
 }