A few months after we deployed the ELK stack, we are not able to see logs on Kibana from some indexes (like filebeat, metricbeat, etc...) and we're not sure why. We can see we have a 5GB filebeat index but we just can't see it in "Discover".
All beats installed on servers seem to be running fine and the indexes are growing in size.
In Kibana's Management section we have this error message:
Could it be related?
Thanks for your help,