From 66c639668c610cc05732da87cb5a0fe502acc6f4 Mon Sep 17 00:00:00 2001
From: Thomas Casteleyn <thomas.casteleyn@super-visions.com>
Date: Tue, 30 Mar 2021 21:08:14 +0200
Subject: [PATCH] Fix inputs.snmp init when no mibs installed (#9050)

---
 plugins/inputs/snmp/snmp.go | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/plugins/inputs/snmp/snmp.go b/plugins/inputs/snmp/snmp.go
index 35d00629acc4c..8f88211d56924 100644
--- a/plugins/inputs/snmp/snmp.go
+++ b/plugins/inputs/snmp/snmp.go
@@ -255,20 +255,22 @@ func (f *Field) init() error {
 		return nil
 	}
 
-	_, oidNum, oidText, conversion, err := SnmpTranslate(f.Oid)
-	if err != nil {
-		return fmt.Errorf("translating: %w", err)
-	}
-	f.Oid = oidNum
-	if f.Name == "" {
-		f.Name = oidText
-	}
-	if f.Conversion == "" {
-		f.Conversion = conversion
+	// check if oid needs translation or name is not set
+	if strings.ContainsAny(f.Oid, ":abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ") || f.Name == "" {
+		_, oidNum, oidText, conversion, err := SnmpTranslate(f.Oid)
+		if err != nil {
+			return fmt.Errorf("translating: %w", err)
+		}
+		f.Oid = oidNum
+		if f.Name == "" {
+			f.Name = oidText
+		}
+		if f.Conversion == "" {
+			f.Conversion = conversion
+		}
+		//TODO use textual convention conversion from the MIB
 	}
 
-	//TODO use textual convention conversion from the MIB
-
 	f.initialized = true
 	return nil
 }