Problem:
When adding a shard, if the passive members of the replset are included, then the addshard command fails

db.runCommand(

{ addshard : "set3/rs3a:27018,rs3b:27018,rs3c:27018,rs3d:27018", maxSize: 409600, name : "shard3" }

);

{
"ok" : 0,
"errmsg" : "host rs3c:27018 does not belong to replica set set3"
}

Workaround:
Only include the active members in the addshard command, and the addshard will succeed

Reproduce:

• create a 3 member replset
• set two nodes with Priority 1 and one with Priority 0
• try the addshard command with all three nodes
• get the failure message

Business Case:
Ease of use