"No monitoring data found" error on Kibana

Hello,

Did you restarted your Elasticsearch then it was resolved?

I tracked myself with all nodes log files. It looked my warm nodes used all heap memory which i set. L related logs i found were shown as below link.

I guess .monitoring indices were not able to be updated from warm nodes after that happened, then my kibana was ahown above error. Weird thing was kibana displayed Status:RED after that even though _cluster/health execution result via each actual nodes were still Status:green.

I decided to restart warm nodes, then issue was gone.

Thank you for sharing update btw.