Problem:
After a replica set member is taken down, a connection that includes this node will get the following

Oct 14, 2010 4:49:46 AM com.mongodb.ReplicaSetStatus$Node update
WARNING: node down: 10.202.7.100:27000 java.io.IOException: couldn't connect to [/10.202.7.100:27000] bc:java.net.ConnectException: Connection refused

Reproduce:

• create a 3 node replica
• create a connection with all three members
• set the connection to SalveOk
• start to read
• take down a node in the replica set
• get the warning message

Business Case:

• User Expereince
  This warning should probably be in the log, but probably not thrown to the client through the driver.