Hortonworks HDP , heartbeat lost in one of the 3 nodes
Well the provided information is not sufficient, anyway i will try to tell you the normal approach I take to debug this.
- First check if all the ambari-agents are running, use the command ambari-agent status.
- Check the logs of both ambari-agent and ambari-server. Normally the logs are available at /var/log/ambari-agent and /var/log/ambari-server. Logs should tell you the exact reason for heartbeat lost.
- Most common reasons for the agent failure would be Connection issues between the machines, version mismatch or corrupt database entry.
I think log files should help you.