expected a sequence when unmarshalling a VB, got 24

[HaradaKumiko]

Host operating system: output of uname -a

Linux staging 6.8.0-49-generic #49-Ubuntu SMP PREEMPT_DYNAMIC Mon Nov 4 02:06:24 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

snmp_exporter version: output of snmp_exporter -version

install using docker: prom/snmp-exporter:latest

What device/snmpwalk OID are you using?

Mikrotik

If this is a new device, please link to the MIB(s).

What did you do that produced an error?

ts=2024-12-12T10:25:47.407Z caller=collector.go:367 level=info auth=public_v2 target=x.x.x.x source_address= worker=0 module=mikrotik msg="Error scraping target" err="error walking target x.x.x.x: error in unmarshalResponse: error decoding value: bytes: 04 82 01 c0 20 20 4d 4d 4d 20 20 20 20 20 20 4d 4d 4d 20 20 20 20 20 20 20 4b 4b 4b 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 54 54 54 54 54 54 54 54 54 54 54 20 20 20 20 20 20 4b 4b 4b 0d 0a 20 20 4d 4d 4d 4d 20 20 20 20 4d 4d 4d 4d 20 20 20 20 20 20 20 4b 4b 4b 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 54 54 54 54 54 54 54 54 54 54 54 20 20 20 20 20 20 4b 4b 4b 0d 0a 20 20 4d 4d 4d 20 4d 4d 4d 4d 20 4d 4d 4d 20 20 49 49 49 20 20 4b 4b 4b 20 20 4b 4b 4b 20 20 52 52 52 52 52 52 20 20 20 20 20 4f 4f 4f 4f 4f 4f 20 20 20 20 20 20 54 54 54 20 20 20 20 20 49 49 49 20 20 4b 4b 4b 20 20 4b 4b 4b 0d 0a 20 20 4d 4d 4d 20 20 4d 4d 20 20 4d 4d 4d 20 20 49 49 49 20 20 4b 4b 4b 4b 4b 20 20 20 20 20 52 52 52 20 20 52 52 52 20 20 4f 4f 4f 20 20 4f 4f 4f 20 20 20 20 20 54 54 54 20 20 20 20 20 49 49 49 20 20 4b 4b 4b 4b 4b 0d 0a 20 20 4d 4d 4d 20 20 20 20 20 20 4d 4d 4d 20 20 49 49 49 20 20 4b 4b 4b 20 4b 4b 4b 20 20 20 52 52 52 52 52 52 20 20 20 20 4f 4f 4f 20 20 4f 4f 4f 20 20 20 20 20 54 54 54 20 20 20 20 20 49 49 49 20 20 4b 4b 4b 20 4b 4b 4b 0d 0a 20 20 4d 4d 4d 20 20 20 20 20 20 4d 4d 4d 20 20 49 49 49 20 20 4b 4b 4b 20 20 4b 4b 4b 20 20 52 52 52 20 20 52 52 52 20 20 20 4f 4f 4f 4f 4f 4f 20 20 20 20 20 20 54 54 54 20 20 20 20 20 49 49 49 20 20 4b 4b 4b 20 20 4b 4b 4b 0d err: truncated (data 451 length 452)"

What did you expect to see?

metrics from mikrotik, like this

HELP hrDeviceDescr A textual description of this device, including the device's manufacturer and revision, and optionally, its serial number. - 1.3.6.1.2.1.25.3.2.1.3

TYPE hrDeviceDescr gauge

hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="1"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="10"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="11"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="12"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="13"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="14"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="15"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="16"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="17"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="18"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="19"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="2"} 1
hrDeviceDescr{hrDeviceDescr="",hrDeviceIndex="20"} 1

What did you see instead?

An error has occurred while serving metrics:

error collecting metric Desc{fqName: "snmp_error", help: "Error scraping target", constLabels: {module="mikrotik"}, variableLabels: {}}: error walking target x.x.x.x: error in unmarshalResponse: expected a sequence when unmarshalling a VB, got 24