Error: assert.soon failed: function () {
    var result = nodes[1].getDB("admin").runCommand({isMaster : 1});
    printjson(result);
    return result.secondary;
}
    at Error (<anonymous>)
    at doassert (src/mongo/shell/assert.js:11:14)
    at Function.assert.soon (src/mongo/shell/assert.js:181:51)
    at /data/mci/shell/src/jstests/replsets/initial_sync3.js:47:8