m31002| 2014-12-07T13:06:08.412-0500 [initandlisten] connection accepted from 10.168.209.60:47814 #21 (7 connections now open)
 m31002| 2014-12-07T13:06:08.412-0500 [initandlisten] connection accepted from 10.168.209.60:47813 #22 (8 connections now open)
 m31002| 2014-12-07T13:06:08.413-0500 [conn1] command write_concern_few_arbiters.$cmd command: insert { insert: "foo", documents: [ { _id: ObjectId('5484970fa3cd07836941245c'), x: 13.0 } ], ordered: true, writeConcern: { w: "majority", wtimeout: 9000.0 } } keyUpdates:0 numYields:0 locks(micros) w:4 reslen:80 1003ms
assert: no write error: { "nInserted" : 1 }
Error: no write error: { "nInserted" : 1 }
    at Error (<anonymous>)
    at doassert (src/mongo/shell/assert.js:11:14)
    at Function.assert.writeError (src/mongo/shell/assert.js:421:9)
    at /data/mci/shell/src/jstests/multiVersion/w_majority_change.js:144:12
    at /data/mci/shell/src/jstests/multiVersion/w_majority_change.js:153:2