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[main](backport #1573) Update troubleshooting.asciidoc #1575

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Dec 19, 2024
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[main](backport #1573) Update troubleshooting.asciidoc #1575

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11 changes: 11 additions & 0 deletions docs/en/ingest-management/troubleshooting/troubleshooting.asciidoc
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,7 @@ Find troubleshooting information for {fleet}, {fleet-server}, and {agent} in the
* <<agent-oom-k8s>>
* <<agent-sudo-error>>
* <<agent-kubernetes-kustomize>>
* <<agent-kubernetes-invalid-api-key>>


[discrete]
Expand Down Expand Up @@ -963,3 +964,13 @@ Extra resources for {agent} on Kubernetes troubleshooting and information:
* https://github.com/elastic/elastic-agent/tree/main/deploy/kubernetes/elastic-agent-kustomize/default[{agent} Kustomize Templates] documentation and resources.

* Other examples and manifests to deploy https://github.com/elastic/elastic-agent/tree/main/deploy/kubernetes[{agent} on Kubernetes].

[discrete]
[[agent-kubernetes-invalid-api-key]]
== Troubleshoot {agent} on Kubernetes seeing `invalid api key to authenticate with fleet` in logs

If an agent was unenrolled from a Kubernetes cluster, there might be data remaining in `/var/lib/elastic-agent-managed/kube-system/state` on the node(s). Reenrolling an agent later on the same nodes might then result in `invalid api key to authenticate with fleet` error messages.

To avoid these errors, make sure to delete this state-folder before enrolling a new agent.

For more information, refer to issue link:https://github.com/elastic/elastic-agent/issues/3586[#3586].
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