I have a replica set of 3 members running on single machine. mongod version
3.0.8. One of member was down and I need to see since when it was down.
The lastHeartbeat and lastHeartbeatRecv seems helpful. But, lastHeartbeat
for the down member should be as old as old as the time when the member was
The documentation is incorrect. Assuming we have two nodes A and B, and we
logged into node A, lastHeartbeat actually records the time when node A
sends a heartbeat to node B, and lastHeartbeatRecv records the time when
node B sends a heartbeat to node A. Therefore, if B was down, the value in
lastHeartbeatRecv will show you the last time B responds to a heartbeat
request from A.