Question :
After setting a cluster with 3 shards, 3 config server with 2 mongos.
I see these errors in the monitoring agents Failure during discovery.
What do they mean I tried to see it on the internet but no luck. 
Answer :
The answer came in with adding a documents into the seetings collection inside the config database.
syntax:
use config
show collections
db.settings.insert({ "_id" : "chunksize", "value" : NumberLong(64) })
db.setting.find() ---#to check
This worked for me.
From those error messages, I can see that there is “name resolution” problem. Like dcixcfitrmdbs03.dcicloud.local what points to “localhost” address obviously.