We have facing some issue with elastic search 8.15.1

Hello Community,

We are running an Elasticsearch 8.15.1 cluster with 7 nodes, each configured with -Xms28g -Xmx28g heap memory. Additionally, we have set vm.max_map_count=262144 on the instances.

Unfortunately, our Elasticsearch cluster has become unresponsive, causing timeouts across all applications. We have checked the logs of all Elasticsearch pods in Kubernetes, but there are no error messages—only INFO and WARN logs related to sharding and replication.

Can anyone help us debug this issue using Kibana DevTools to confirm whether the problem lies with Elasticsearch or if it is caused by an underlying network issue in the Kubernetes cluster? Any guidance on identifying potential bottlenecks would be greatly appreciated.

Thanks!