MongoDB: No host in new replica set maps to this node
In the “trivial-errors” category, I imagine one will encounter this error when setting up MongoDB replica sets.
"ok" : 0,
"errmsg" : "No host described in new configuration 1 for replica set replset maps to this node",
"code" : 93
What this means is that the current instance cannot connect to host 1 in my rsconfig for a few possible reasons.
- A firewall or network configuration blocking access to the MongoDB port.
- The host cannot be resolved.
- There is not mongod instance specified on that host:port.
- And more
So the next time you see these errors, check your replica set config, make sure you can connect to each node first.