Performancecounter: panic: reflect.StructOf: field 0 has invalid name

[Nachtfalkeaw]

Current Behavior

Command:
C:\Users\Alexander\Desktop\windows_exporter-0.30.0-rc.4-amd64.exe --config.file=C:\Users\Alexander\Desktop\windows_exporter.yml --log.file=C:\Users\Alexander\Desktop\windows_exporter.log

config:

I tried with

Panic
objects: |-

Panic
objects: |

Running but not perfcounter results.
objects:

Discrepancy in readme:
https://github.com/prometheus-community/windows_exporter/blob/master/docs/collector.performancecounter.md

top of readme ( |- vs | )

Caution

If you are using a configuration file, the value must be kept as a string.

Use a |- to keep the value as a string.

bottom of readme

Note

If you are using a configuration file, the value must be keep as string.

Example:

collector:
  performancecounter:
    objects: |

## C:\Users\Alexander\Desktop\windows_exporter-0.30.0-rc.4-amd64.exe --config.file=C:\Users\Alexander\Desktop\windows_exporter.yml --log.file=C:\Users\Alexander\Desktop\windows_exporter.log


collectors:
  enabled: performancecounter

## https://kb.paessler.com/en/topic/50673-how-can-i-find-out-the-names-of-available-performance-counters
## https://gist.github.com/shadowbq/7babb99078721c153346fed4173059ad
## per Windows cmd PerformanceCounter auslesen. Beispiel case-insensitive mit regex für BitLocker                 typeperf -qx | findstr /I /R BitLocker
## https://leanpub.com/windowspowershellnetworkingguide/read#leanpub-auto-performance-counters
## Powershell alle Performance Counter:
##                           Get-Counter -ListSet * | Sort-Object CounterSetName | Select-Object CounterSetName
## Powershell zu einem Performancecounter (hier: Prozess) die Pfade in Variable "paths":
##                           $paths = (Get-Counter -ListSet Prozess).paths
## Powershell alle Pfade aus de Variablen nun auslesen. Das ist das, was wir bei performancecounter brauchen
##                           Get-Counter -Counter $paths
collector:
  performancecounter:
### not working YAML
#    objects: |
#      - object: "Memory"
#        counters:
#          - name: "Cache Faults/sec"
#            type: "counter"
#      
#      - object: "BitLocker"
#        instances:
#          - "C:"
#          - "E:"
#          - "F:"
#        instance_label: "Laufwerk"
#        counters:
#          - name: "Write Requests/sec"
#            type: "counter"
#      
#      - object: "BitLocker"
#        instances:
#          - "D:"
#          - "G:"
#          - "H:"
#        instance_label: "DLaufwerk"
#        counters:
#          - name: "Read Requests/sec"
#            type: "counter"
#
### working JSON
    objects: |-
      [
        {
          "name": "pf1",
          "object": "Memory",
          "counters": [
            {
              "name": "Cache Faults/sec",
              "type": "counter"
            }
          ]
        },
        {
          "name": "pf2",
          "object": "BitLocker",
          "instances": [
            "*"
          ],
          "instance_label": "Laufwerk",
          "counters": [
            {
              "name": "Write Requests/sec",
              "type": "counter"
            },
            {
              "name": "Write Subrequests/sec",
              "type": "counter"
            },
            {
              "name": "Read Requests/sec",
              "type": "counter"
            },
            {
              "name": "Read Subrequests/sec",
              "type": "counter"
            }
          ]
        },
        {
          "name": "pf3",
          "object": "Event Tracing for Windows",
          "counters": [
            {
              "name": "Total Memory Usage --- Non-Paged Pool",
              "type": "counter"
            },
            {
              "name": "Total Memory Usage --- Paged Pool",
              "type": "counter"
            },
            {
              "name": "Total Number of Active Sessions",
              "type": "counter"
            },
            {
              "name": "Total Number of Distinct Disabled Providers",
              "type": "counter"
            }
          ]
        },
        {
          "name": "pf4",
          "object": "User Input Delay per Session",
          "counters": [
            {
              "name": "Max Session Input Delay (ms)",
              "type": "counter"
            }
          ]
        }
      ]

##
##
##      - object: "Processor Information"
##        instances: ["*"]
##        instance_label: "core"
##        counters:
##          - name: "% Processor Time"
##            type: "gauge"
##            metric: windows_performancecounter_processor_information_processor_time # optional
##            labels:
##              state: active
##          - name: "% Idle Time"
##            type: "counter"
##            metric: windows_performancecounter_processor_information_processor_time # optional
##            labels:
##              state: idle
##
##      - object: "BitLocker"
##        instances: ["C:"]
##        instance_label: "Laufwerk"
##        counters:
##          - name: "Schreibunteranforderungen/Sek."
##            metric: windows_performancecounter_bitlocker_leseanforderungen_seconds # optional
##            labels:
##              state: active
##
##      - object: "BitLocker"
##        instances: ["*"]
##        instance_label: "Laufwerk"
##        counters:
##          - name: "*"
##            #metric: windows_performancecounter_bitlocker_leseanforderungen_seconds # optional
##            labels:
##              state: active
##



## collectors:
##   enabled: ad,adcs,adfs,cache,cpu,cpu_info,cs,diskdrive,dfsr,dhcp,dns,exchange,filetime,fsrmquota,hyperv,iis,license,logical_disk,logon,memory,mscluster,msmq,mssql,netframework,net,os,pagefile,perfdata,physical_disk,printer,process,remote_fx,scheduled_task,service,smb,smbclient,smtp,system,tcp,terminal_services,thermalzone,time,udp,update,vmware
## collector:
##   process:
##     include: .*alloy.*
##   service:
##     exclude: ".*"
##   scheduled_task:
##     exclude: ".*"
##   mssql:
##     enabled_classes: ["accessmethods", "availreplica", "bufman", "databases", "dbreplica", "genstats", "locks", "memmgr", "sqlstats", "sqlerrors", "transactions", "waitstats"]
##   smb:
##     enabled_list: "ServerShares"
##   smb_client:
##     enabled_list: "ClientShares"
##   hyperv:
##     enabled: datastore,dynamic_memory_balancer,dynamic_memory_vm,hypervisor_logical_processor,hypervisor_root_partition,hypervisor_root_virtual_processor,hypervisor_virtual_processor,legacy_network_adapter,virtual_machine_health_summary,virtual_machine_vid_partition,virtual_network_adapter,virtual_network_adapter_drop_reasons,virtual_smb,virtual_storage_device,virtual_switch
##   filetime:
##     file-patterns: C:\Users\Alexander\Desktop\windows_exporter.log


log:
  level: debug
scrape:
  timeout-margin: 0.5
telemetry:
  path: /metrics
  max-requests: 0
web:
  listen-address: ":9182"
  disable-exporter-metrics: true     ## disabled go, prom metrics

Error:

C:\WINDOWS\system32>C:\Users\Alexander\Desktop\windows_exporter-0.30.0-rc.4-amd64.exe --config.file=C:\Users\Alexander\Desktop\windows_exporter.yml --log.file=C:\Users\Alexander\Desktop\windows_exporter.log
panic: reflect.StructOf: field 0 has invalid name

goroutine 9 [running]:
reflect.StructOf({0xc0000f8000, 0x2, 0xc000047f18?})
        C:/hostedtoolcache/windows/go/1.23.4/x64/src/reflect/type.go:2371 +0x2694
github.com/prometheus-community/windows_exporter/internal/collector/performancecounter.(*Collector).Build(0xc000144e60, 0xc000243e00, 0xdd9440?)
        D:/a/windows_exporter/windows_exporter/internal/collector/performancecounter/performancecounter.go:193 +0x1525
github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build.func1()
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:220 +0x8a
created by github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build in goroutine 1
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:217 +0x1e5

C:\WINDOWS\system32>
C:\WINDOWS\system32>
C:\WINDOWS\system32>C:\Users\Alexander\Desktop\windows_exporter-0.30.0-rc.4-amd64.exe --config.file=C:\Users\Alexander\Desktop\windows_exporter.yml --log.file=C:\Users\Alexander\Desktop\windows_exporter.log
panic: reflect.StructOf: field 0 has invalid name

goroutine 23 [running]:
reflect.StructOf({0xc000328000, 0x2, 0xc000047f18?})
        C:/hostedtoolcache/windows/go/1.23.4/x64/src/reflect/type.go:2371 +0x2694
github.com/prometheus-community/windows_exporter/internal/collector/performancecounter.(*Collector).Build(0xc0000f4f00, 0xc0001f7ea0, 0xdd9440?)
        D:/a/windows_exporter/windows_exporter/internal/collector/performancecounter/performancecounter.go:193 +0x1525
github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build.func1()
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:220 +0x8a
created by github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build in goroutine 1
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:217 +0x1e5

C:\WINDOWS\system32>
C:\WINDOWS\system32>
C:\WINDOWS\system32>C:\Users\Alexander\Desktop\windows_exporter-0.30.0-rc.4-amd64.exe --config.file=C:\Users\Alexander\Desktop\windows_exporter.yml --log.file=C:\Users\Alexander\Desktop\windows_exporter.log
panic: reflect.StructOf: field 0 has invalid name

goroutine 7 [running]:
reflect.StructOf({0xc000270000, 0x2, 0xc0003c7f18?})
        C:/hostedtoolcache/windows/go/1.23.4/x64/src/reflect/type.go:2371 +0x2694
github.com/prometheus-community/windows_exporter/internal/collector/performancecounter.(*Collector).Build(0xc000338640, 0xc0003ac3f0, 0xdd9440?)
        D:/a/windows_exporter/windows_exporter/internal/collector/performancecounter/performancecounter.go:193 +0x1525
github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build.func1()
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:220 +0x8a
created by github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build in goroutine 1
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:217 +0x1e5

Expected Behavior

metrics, no panic,

Steps To Reproduce

see above

Environment

• windows_exporter Version: windows_exporter-0.30.0-rc.4-amd64.exe
• Windows Version: 10

windows_exporter logs

time=2024-12-27T19:53:15.522Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T19:53:15.523Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T19:53:15.523Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T19:53:15.527Z level=ERROR source=main.go:218 msg="couldn't initialize collector" err="error build collector performancecounter: object name is required"
time=2024-12-27T19:53:23.115Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T19:53:23.116Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T19:53:23.116Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T19:53:23.120Z level=ERROR source=main.go:218 msg="couldn't initialize collector" err="error build collector performancecounter: object name is required"
time=2024-12-27T19:54:28.866Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T19:54:28.867Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T19:54:28.867Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T19:54:29.142Z level=ERROR source=main.go:218 msg="couldn't initialize collector" err="error build collector performancecounter: object name is required"
time=2024-12-27T19:55:07.954Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T19:55:07.955Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T19:55:07.955Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T19:55:08.230Z level=ERROR source=main.go:218 msg="couldn't initialize collector" err="error build collector performancecounter: object name is required"
time=2024-12-27T19:57:10.635Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T19:57:10.636Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T19:57:10.636Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T19:57:10.904Z level=ERROR source=main.go:218 msg="couldn't initialize collector" err="error build collector performancecounter: object name is required"
time=2024-12-27T19:57:43.346Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T19:57:43.347Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T19:57:43.347Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T19:57:43.355Z level=INFO source=main.go:311 msg="Running as NACHTFALKE\\Alexander"
time=2024-12-27T19:57:43.355Z level=INFO source=main.go:228 msg="Enabled collectors: performancecounter"
time=2024-12-27T19:57:43.355Z level=INFO source=main.go:246 msg="starting windows_exporter in 9.7822ms" version=0.30.0-rc.4 branch=HEAD revision=78386557d4dcb168b82e87084db8faf04dacdd72 goversion=go1.23.4 builddate=20241222-13:19:26 maxprocs=12
time=2024-12-27T19:57:43.357Z level=INFO source=tls_config.go:347 msg="Listening on" address=[::]:9182
time=2024-12-27T19:57:43.357Z level=INFO source=tls_config.go:350 msg="TLS is disabled." http2=false address=[::]:9182
time=2024-12-27T19:57:56.653Z level=DEBUG source=collect.go:220 msg="collector performancecounter succeeded after 0s, resulting in 0 metrics"
time=2024-12-27T19:58:30.486Z level=DEBUG source=collect.go:220 msg="collector performancecounter succeeded after 0s, resulting in 0 metrics"
time=2024-12-27T20:00:00.159Z level=INFO source=main.go:278 msg="Shutting down windows_exporter via kill signal"
time=2024-12-27T20:00:00.159Z level=INFO source=main.go:296 msg="windows_exporter has shut down"
time=2024-12-27T20:00:55.715Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T20:00:55.717Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T20:00:55.717Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T20:01:40.411Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T20:01:40.412Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T20:01:40.412Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T20:01:59.123Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T20:01:59.124Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T20:01:59.124Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T20:02:33.716Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T20:02:33.717Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T20:02:33.717Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T20:05:54.677Z level=INFO source=config.go:79 msg="loading configuration file: C:\\Users\\Alexander\\Desktop\\windows_exporter.yml"
time=2024-12-27T20:05:54.678Z level=DEBUG source=main.go:196 msg="logging has Started"
time=2024-12-27T20:05:54.678Z level=DEBUG source=main.go:337 msg="setting process priority to normal"
time=2024-12-27T20:05:54.689Z level=INFO source=main.go:311 msg="Running as NACHTFALKE\\Alexander"
time=2024-12-27T20:05:54.689Z level=INFO source=main.go:228 msg="Enabled collectors: performancecounter"
time=2024-12-27T20:05:54.689Z level=INFO source=main.go:246 msg="starting windows_exporter in 12.912ms" version=0.30.0-rc.4 branch=HEAD revision=78386557d4dcb168b82e87084db8faf04dacdd72 goversion=go1.23.4 builddate=20241222-13:19:26 maxprocs=12
time=2024-12-27T20:05:54.690Z level=INFO source=tls_config.go:347 msg="Listening on" address=[::]:9182
time=2024-12-27T20:05:54.690Z level=INFO source=tls_config.go:350 msg="TLS is disabled." http2=false address=[::]:9182
time=2024-12-27T20:06:00.272Z level=DEBUG source=collect.go:220 msg="collector performancecounter succeeded after 0s, resulting in 0 metrics"
time=2024-12-27T20:06:02.079Z level=DEBUG source=collect.go:220 msg="collector performancecounter succeeded after 0s, resulting in 0 metrics"
time=2024-12-27T20:06:04.043Z level=DEBUG source=collect.go:220 msg="collector performancecounter succeeded after 0s, resulting in 0 metrics"
time=2024-12-27T20:06:04.283Z level=DEBUG source=collect.go:220 msg="collector performancecounter succeeded after 0s, resulting in 0 metrics"
time=2024-12-27T20:06:04.442Z level=DEBUG source=collect.go:220 msg="collector performancecounter succeeded after 0s, resulting in 0 metrics"
time=2024-12-27T20:06:04.594Z level=DEBUG source=collect.go:220 msg="collector performancecounter succeeded after 0s, resulting in 0 metrics"

Anything else?

No response

[jkroepke]

thanks, Seems like I did not sanitize brackets.

The fix in available here: https://github.com/prometheus-community/windows_exporter/actions/runs/12454122957/artifacts/2353309323 and in the next release.

[Nachtfalkeaw]

@jkroepke
tried the binary from the provided link.

still panics - same config as before:

C:\WINDOWS\system32>C:\Users\Alexander\Desktop\windows_exporter-0.30.0-rc.3-1-g7838655-amd64.exe  --config.file=C:\Users\Alexander\Desktop\windows_exporter.yml --log.file=C:\Users\Alexander\Desktop\windows_exporter.log
panic: reflect.StructOf: field 0 has invalid name

goroutine 10 [running]:
reflect.StructOf({0xc00035a000, 0x2, 0xc000047f18?})
        C:/hostedtoolcache/windows/go/1.23.4/x64/src/reflect/type.go:2371 +0x2694
github.com/prometheus-community/windows_exporter/internal/collector/performancecounter.(*Collector).Build(0xc000142eb0, 0xc00023fed0, 0x179440?)
        D:/a/windows_exporter/windows_exporter/internal/collector/performancecounter/performancecounter.go:193 +0x1525
github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build.func1()
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:220 +0x8a
created by github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build in goroutine 1
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:217 +0x1e5

C:\WINDOWS\system32>C:\Users\Alexander\Desktop\windows_exporter-0.30.0-rc.3-1-g7838655-amd64.exe  --config.file=C:\Users\Alexander\Desktop\windows_exporter.yml --log.file=C:\Users\Alexander\Desktop\windows_exporter.log
panic: reflect.StructOf: field 0 has invalid name

goroutine 7 [running]:
reflect.StructOf({0xc0002d8000, 0x2, 0xc0003a9f18?})
        C:/hostedtoolcache/windows/go/1.23.4/x64/src/reflect/type.go:2371 +0x2694
github.com/prometheus-community/windows_exporter/internal/collector/performancecounter.(*Collector).Build(0xc000316640, 0xc00038c3f0, 0x179440?)
        D:/a/windows_exporter/windows_exporter/internal/collector/performancecounter/performancecounter.go:193 +0x1525
github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build.func1()
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:220 +0x8a
created by github.com/prometheus-community/windows_exporter/pkg/collector.(*Collection).Build in goroutine 1
        D:/a/windows_exporter/windows_exporter/pkg/collector/collection.go:217 +0x1e5

I get the panic with
objects: |-

and this:
objects: |

what is the correct syntax?

[jkroepke]

It seems like I deliver the wrong link to you. I guess I had a old tab open. Sorry for that.

Here is the correct one: https://github.com/prometheus-community/windows_exporter/actions/runs/12520747861/artifacts/2366802477 the file name is windows_exporter-0.30.0-rc.4-1-g81ea4c6

I also provide a documentation how to access the builds by your own.

https://github.com/prometheus-community/windows_exporter/wiki/Snapshot-Builds

I get the panic with
objects: |-

and this:
objects: |

what is the correct syntax?

Both variants are fine. The pipe is mandatory. The hypen declare that a pending newline is trimmed. https://yaml-multiline.info/ describe it well.

YAML hass approx 63 different variation how multi line values can be declared.