Kibana parse_exception: No processor type exists with name [inference]

Elastic Stack Kibana
1

I often get Kibana errors when accessing e.g. fleet or observability.
Browser then shows:

Unable to initialize Fleet

<html> <head><title>502 Bad Gateway</title></head> <body> <center><h1>502 Bad Gateway</h1></center> <hr><center>nginx</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page -->

in the log:

[2025-08-11T06:48:48.629+00:00][ERROR][plugins.observabilityAIAssistant.service] Failed to initialize service: parse_exception
	Root causes:
		parse_exception: No processor type exists with name [inference]
[2025-08-11T06:48:48.630+00:00][ERROR][plugins.observabilityAIAssistant.service] Could not index 7 entries because of an initialisation error
[2025-08-11T06:48:48.630+00:00][ERROR][plugins.observabilityAIAssistant.service] ResponseError: parse_exception
	Root causes:
		parse_exception: No processor type exists with name [inference]
    at KibanaTransport.request (/usr/share/kibana/node_modules/@elastic/transport/lib/Transport.js:479:27)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at KibanaTransport.request (/usr/share/kibana/node_modules/@kbn/core-elasticsearch-client-server-internal/src/create_transport.js:51:16)
    at Ingest.putPipeline (/usr/share/kibana/node_modules/@elastic/elasticsearch/lib/api/api/ingest.js:139:16)
    at ObservabilityAIAssistantService.<anonymous> (/usr/share/kibana/node_modules/@kbn/observability-ai-assistant-plugin/server/service/index.js:123:9)

After the error has occurred once, everything works flawlessly again for a while.

Setup:
Kibana / Elastic for Kubernetes. 2 Kibana instances behind Loadbalancer.
Version 8.10.4

2

Hello @msconsults

Could you please review below post and confirm if you also receive same error about “Kibana is shutting down” in the logs?

Thanks!!