@Dhirendra Khanka If the heartbeat lost is happening once or twice a week and then if the heart beat of the agent is coming back immediately in few seconds, then it can be ignored or if we do not want to see the alert then we can try to increase the default check interval from 2 minutes to 3 minutes. Ambari UI --> Alerts --> "Ambari Agent Heartbeat" --> "Edit" and then increase the "Check Interval" from 2 minutes (TO) 3 minutes. Sometimes due to heavy load or Network traffic or network slow request/response the heartbeat is not sent/received properly. If it is happening on a specific time in a day or week then we can check the edge node if it was running an heavy job or network operation to see if that was causing any issue. . ... View more

Restarting the hdfs, yarn and mapreduce after some configuration change(not related to the post) did the trick. ... View more

Hi @Nigel Jones, have you found a solution to this problem yet? I am experiencing the exact same problems starting up HDP 3.0.0 ... View more