Elastic agent Windows integration issue

f4n-1nh1b1t10n
Tue, 05 Aug 2025 20:28:32 +0000
Elastic Agent

Hello,

first post here.
Short description of the current environment:

kibana and elasticsearch on 1 host (virtualized in a vbox)

standalone elastic agent on another host (a windows laptop) with Windows (v3.1.0) & system (v2.5.2) integration

the stack and the agent are all running version 8.19.0

the laptop runs the agent and sysmon as a service

I've defined an agent policy in kibana. Added the integration for windows and system. Used the config YML it produces for the elastic agent.

The system metrics integration seems to work OK.
I'm having trouble however with the Windows modules:

Input 'winlog' failed with: input winlog-windows.sysmon_operational-18936846-6fdf-4c10-b3e8-e2cb8b32ed367 failed: input **panic** with: name winlog-windows_sysmon_operational-18936846-6fdf-4c10-b3e8-e2cb8b32ed367 already used
goroutine 121 [running]:
runtime/debug.Stack()
	runtime/debug/stack.go:26 +0x5e
github.com/elastic/beats/v7/filebeat/input/v2/input-cursor.(*managedInput).runSource.func1()
	github.com/elastic/beats/v7/filebeat/input/v2/input-cursor/input.go:172 +0x58
panic({0x84afae0?, 0xc0031d39a0?})
	runtime/panic.go:792 +0x132
github.com/elastic/elastic-agent-libs/monitoring.panicErr(...)
	github.com/elastic/elastic-agent-libs@v0.20.0/monitoring/registry.go:287
github.com/elastic/elastic-agent-libs/monitoring.(*Registry).Add(0xc0023f1340, {0xc0019dacd0?, 0xc0031da9c0?}, {0xa5afaa0, 0xc0031cee00}, 0x0?)
	github.com/elastic/elastic-agent-libs@v0.20.0/monitoring/registry.go:185 +0xca
github.com/elastic/elastic-agent-libs/monitoring.(*Registry).NewRegistry(0xc0023f1340, {0xc0019dacd0, 0x47}, {0x0?, 0xa587628?, 0x1?})
	github.com/elastic/elastic-agent-libs@v0.20.0/monitoring/registry.go:94 +0x155
github.com/elastic/beats/v7/libbeat/monitoring/inputmon.NewInputRegistry({0x96e8106, 0x6}, {0xc0000b02d0, 0x47}, 0x0)
	github.com/elastic/beats/v7/libbeat/monitoring/inputmon/input.go:73 +0x36f
github.com/elastic/beats/v7/winlogbeat/eventlog.newInputMetrics({0xc002132a80, 0x24}, {0xc0000b02d0?, 0xc0031a5420?})
	github.com/elastic/beats/v7/winlogbeat/eventlog/wineventlog.go:688 +0x56
github.com/elastic/beats/v7/winlogbeat/eventlog.(*winEventLog).Open(0xc0001076c0, {{0x0, 0x0}, 0x0, {0x0, 0x0, 0x0}, {0x0, 0x0}})
	github.com/elastic/beats/v7/winlogbeat/eventlog/wineventlog.go:334 +0x9f
github.com/elastic/beats/v7/winlogbeat/eventlog.Run({0xa5bb280, 0xc0031a6dc0}, {0xa652bc8, 0xc0026218b0}, {0xa6712d0, 0xc0001076c0}, {{0x0, 0x0}, 0x0, {0x0, ...}, ...}, ...)
	github.com/elastic/beats/v7/winlogbeat/eventlog/runner.go:80 +0x331
github.com/elastic/beats/v7/filebeat/input/winlog.winlogInput.Run({}, {0xc0031abec0, {0xc001d341b0, 0x90}, {0xc0000b02d0, 0x47}, {0x96e8106, 0x6}, {{0x96f117b, 0x8}, ...}, ...}, ...)
	github.com/elastic/beats/v7/filebeat/input/winlog/input.go:103 +0x3ff
github.com/elastic/beats/v7/filebeat/input/v2/input-cursor.(*managedInput).runSource(_, {0xc0031abec0, {0xc001d341b0, 0x90}, {0xc0000b02d0, 0x47}, {0x96e8106, 0x6}, {{0x96f117b, 0x8}, ...}, ...}, ...)
	github.com/elastic/beats/v7/filebeat/input/v2/input-cursor/input.go:196 +0x483
github.com/elastic/beats/v7/filebeat/input/v2/input-cursor.(*managedInput).Run.func1()
	github.com/elastic/beats/v7/filebeat/input/v2/input-cursor/input.go:151 +0x2f2
github.com/elastic/go-concert/unison.(*MultiErrGroup).Go.func1()
	github.com/elastic/go-concert@v0.3.0/unison/multierrgroup.go:42 +0x66
created by github.com/elastic/go-concert/unison.(*MultiErrGroup).Go in goroutine 342
	github.com/elastic/go-concert@v0.3.0/unison/multierrgroup.go:40 +0x76

The same error is produced for all Windows modules that were enabled.
there is only 1 instance of the agent running.
I've looked at Winlogbeat Fatal Error 8.7.0+ name already used - Elastic Stack / Beats - Discuss the Elastic Stack and ids from the generated yml all seem to be different.

Can someone help me?
Thanks a lot.

EDIT:

Some extra information.

Seems like the handle is not closing.

EDIT 2:

Thinking it's a unique-id-config issue, i uninstalled the agent.
installed winlogbeat, and a similar panic error prevented me from starting it.
But, this issue was already discussed in Winlogbeat Fatal Error 8.7.0+ name already used - Elastic Stack / Beats - Discuss the Elastic Stack.

In the winlogbeat yaml, you can in a clean way add a unique id to each event log you want to ingest, like so:

  - name: Microsoft-Windows-Sysmon/Operational
    id: sysmon-logs

So, given i'm not using the advantages of fleet, i'm inclined to switch over to winlogbeat, even though the agent can still be used for metrics and other event types (currently not concerned with the overhead that 2 separate beats produce).

3 posts - 2 participants