m30000| Wed Jul 11 03:25:12 [conn15] command admin.$cmd command: { moveChunk: "test.foo", from: "localhost:30000", to: "localhost:30001", fromShard: "shard0000", toShard: "shard0001", min: { num: MinKey }, max: { num: 4.0 }, maxChunkSizeBytes: 52428800, shardId: "test.foo-num_MinKey", configdb: "localhost:30000,localhost:30001,localhost:30002", secondaryThrottle: false } ntoreturn:1 keyUpdates:0 reslen:350 394ms m30999| Wed Jul 11 03:25:12 [conn1] moveChunk result: { who: { _id: "test.foo", process: "bs-mm1.local:30000:1341991510:1982529625", state: 1, ts: ObjectId('4ffd2a58e84c6f09779dc5cb'), when: new Date(1341991512098), who: "bs-mm1.local:30000:1341991510:1982529625:conn19:594228950", why: "migrate-{ num: MinKey }" }, errmsg: "the collection metadata could not be locked with lock migrate-{ num: MinKey }", ok: 0.0 } "movechunk" : "test.foo", "find" : { "num" : 3 }, "to" : "localhost:30001" Wed Jul 11 03:25:12 uncaught exception: command { "cause" : { "who" : { "_id" : "test.foo", "process" : "bs-mm1.local:30000:1341991510:1982529625", "state" : 1, "ts" : ObjectId("4ffd2a58e84c6f09779dc5cb"), "when" : ISODate("2012-07-11T07:25:12.098Z"), "who" : "bs-mm1.local:30000:1341991510:1982529625:conn19:594228950", "why" : "migrate-{ num: MinKey }" }, "errmsg" : "the collection metadata could not be locked with lock migrate-{ num: MinKey }", "ok" : 0 }, "ok" : 0, "errmsg" : "move failed" } } failed: { failed to load: /Users/yellow/buildslave/OS_X_105_64bit_DUR_OFF/mongo/jstests/sharding/sync2.js