we started three mongod(correspond to three shard) in every server.afte we insert data about 1000,0000,we check the process mongods whether they are still started yet.then we find someone is stoped, the log is uploaded in the first attachement.
another qusetion:query error,

Mon Jul 22 10:00:30.337 [repl writer worker 1] ERROR: writer worker caught exception: BSONObj size: 1936028718 (0x2E746573) is i
nvalid. Size must be between 0 and 16793600(16MB) First element: : ?type=116 on: { ts: Timestamp 1374316162000|168, h: -21285760
6414574318, v: 2, op: "i", ns: "test.test", o:

{ _id: "1374316189024ec10f959daaa", C_ID: "1618", TIME: new Date(1374316189024), SE: "3", AREA: "a14", CT1: "4", CT2: "3", S_PT: 4, EN_N: "Test system", T_ID: "242", EN_T: "2", MSG: "for test35", EVENT: "test event70", S_IP: "1.2.4.138", URL: "URL257" }

}

how to deal with them