Mongodb replica set status showing "RECOVERING"

I have setup the replica set over 3 mongo server and imported the 5 GB data. now status of secondary server showing "RECOVERING". Could you let me know what is means for "RECOVERING" and how to solve this issue.

Status is as below

rs.status()
{
    "set" : "kutendarep",
    "date" : ISODate("2013-01-15T05:04:18Z"),
    "myState" : 3,
    "members" : [
        {
            "_id" : 0,
            "name" : "10.1.4.138:27017",
            "health" : 1,
            "state" : 3,
            "stateStr" : "RECOVERING",
            "uptime" : 86295,
            "optime" : Timestamp(1357901076000, 4),
            "optimeDate" : ISODate("2013-01-11T10:44:36Z"),
            "errmsg" : "still syncing, not yet to minValid optime 50f04941:2",
            "self" : true
        },
        {
            "_id" : 1,
            "name" : "10.1.4.21:27017",
            "health" : 1,
            "state" : 1,
            "stateStr" : "PRIMARY",
            "uptime" : 86293,
            "optime" : Timestamp(1358160135000, 18058),
            "optimeDate" : ISODate("2013-01-14T10:42:15Z"),
            "lastHeartbeat" : ISODate("2013-01-15T05:04:18Z"),
            "pingMs" : 0
        },
        {
            "_id" : 2,
            "name" : "10.1.4.88:27017",
            "health" : 1,
            "state" : 3,
            "stateStr" : "RECOVERING",
            "uptime" : 86291,
            "optime" : Timestamp(1357900674000, 10),
            "optimeDate" : ISODate("2013-01-11T10:37:54Z"),
            "lastHeartbeat" : ISODate("2013-01-15T05:04:16Z"),
            "pingMs" : 0,
            "errmsg" : "still syncing, not yet to minValid optime 50f04941:2"
        }
    ],
    "ok" : 1