replica set unable to add a node I am trying to create a replica set. I had create a primary node then I am trying to add a secondary node but it gives an error message 


  Quorum check failed because not enough voting nodes responde                                            d; required 2 but only the following 1 voting nodes responded:...


Anyone know what the problems is?
Simple. It means that your node cannot connect that other node. Check firewall settings between those nodes.

If you go to the command line, telnet node.ip.addr.ess 27107 should work.