> Hi Adam
> Here's the output:

> mongos> db.locks.find();

> { "_id" : "admin-movePrimary", "process" :
> "Web1:27069:1343571761:1804289383", "state" : 0, "ts" :
> ObjectId("501555d74439248d85dc8867"), "when" :
> ISODate("2012-07-29T15:25:11.099Z"), "who" :
> "Web1:27069:1343571761:1804289383:conn122:1714636915", "why" : "Moving
> primary shard of admin" }

> { "_id" : "example_production-movePrimary", "process" :
> "Web1:27069:1343571761:1804289383", "state" : 0, "ts" :
> ObjectId("501553614439248d85dc885a"), "when" :
> ISODate("2012-07-29T15:14:41.616Z"), "who" :
> "Web1:27069:1343571761:1804289383:conn1:1681692777", "why" : "Moving
> primary shard of example_production" }

> { "_id" : "example_production_vanity-movePrimary", "process" :
> "Web1:27069:1343571761:1804289383", "state" : 0, "ts" :
> ObjectId("501552fb4439248d85dc8855"), "when" :
> ISODate("2012-07-29T15:12:59.598Z"), "who" :
> "Web1:27069:1343571761:1804289383:conn1:1681692777", "why" : "Moving
> primary shard of example_production_vanity" }

> { "_id" : "balancer", "process" : "web1:27069:1346283357:314909341",
> "state" : 2, "ts" : ObjectId("503f4f2a3c113ffbd8e4a7e9"), "when" :
> ISODate("2012-08-30T11:31:54.320Z"), "who" :
> "web1:27069:1346283357:314909341:Balancer:1842493053", "why" : "doing
> balance round" }

> { "_id" : "example_production.people", "process" :
> "mongo11:20011:1346282264:758785138", "state" : 0, "ts" :
> ObjectId("503f4f2ce69a6c2009e22331"), "when" :
> ISODate("2012-08-30T11:31:56.182Z"), "who" :
> "mongo11:20011:1346282264:758785138:conn37208:1670912857", "why" :
> "migrate-{ _id: MinKey }" }

> { "_id" : "example_production.new_coll", "process" :
> "web1:27069:1346283357:314909341", "state" : 0, "ts" :
> ObjectId("503f36eb3c113ffbd8e4a6a1"), "when" :
> ISODate("2012-08-30T09:48:27.208Z"), "who" :
> "web1:27069:1346283357:314909341:conn37665:149759223", "why" : "drop" }

> { "_id" : "example_production_vanity.metrics", "process" :
> "web1:27069:1346283357:314909341", "state" : 0, "ts" :
> ObjectId("503f37833c113ffbd8e4a6aa"), "when" :
> ISODate("2012-08-30T09:50:59.474Z"), "who" :
> "web1:27069:1346283357:314909341:conn37665:149759223", "why" : "drop" }

> Thanks!

> Dani

> Am Donnerstag, 30. August 2012 12:32:06 UTC+2 schrieb Adam C:

>> Dani,

>> You might have a stale lock lying around, or the mongos may have a stale
>> view of things - can you do a couple of things for me:

>> 1. Bounce (restart) all of your mongos
>> 2. Once the bounce is complete, log into the mongos and run:

>> use config;
>> db.locks.find();

>> And post the results here.

>> Thanks,

>> Adam

>> On Thursday, August 30, 2012 11:20:08 AM UTC+1, Daniel Schlegel wrote:

>>> Hello
>>> i've upgraded to mongo 2.2.0 yesterday. all went like charme and i could
>>> shard my collection.
>>> In the documentation i read:
>>> Both splits and migrates are performed automatically.

>>> But unfortunately this doesn't work on our setup.
>>> I get error messages like these:

>>> Thu Aug 30 12:16:42 [Balancer]  ns: production.people going to move {
>>> _id: "production.people-_id_MinKey", lastmod: Timestamp 1000|0,
>>> lastmodEpoch: ObjectId('503e9d5ef940d75c2de07f8e'), ns:
>>> "production.people", min: { _id: MinKey }, max: { _id: 304836 }, shard:
>>> "s1" } from: s1 to: s2 tag []

>>> Thu Aug 30 12:16:42 [Balancer] moving chunk ns: production.people moving
>>> ( ns:production.people at: s1:s1/mongo11.example.com:20011,
>>> mongo12.example.com:20012 lastmod: 1|0||000000000000000000000000 min: {
>>> _id: MinKey } max: { _id: 304836 }) s1:s1/mongo11.example.com:20011,
>>> mongo12.example.com:20012 -> s2:s2/mongo21.example.com:20021,
>>> mongo22.example.com:20022

>>> Thu Aug 30 12:16:43 [Balancer] moveChunk result: { cause: { errmsg:
>>> "migrate already in progress", ok: 0.0 }, errmsg: "moveChunk failed to
>>> engage TO-shard in the data transfer: migrate already in progress", ok: 0.0
>>> }

>>> Thu Aug 30 12:16:43 [Balancer] balancer move failed: { cause: { errmsg:
>>> "migrate already in progress", ok: 0.0 }, errmsg: "moveChunk failed to
>>> engage TO-shard in the data transfer: migrate already in progress", ok: 0.0
>>> } from: s1 to: s2 chunk:  min: { _id: MinKey } max: { _id: MinKey }

>>> After 10h of waiting there is still all data on the first shard and the
>>> second is empty.
>>> I think about manually splitting but as it's not so easy to find the
>>> right splitpoint in our database i've not done this yet.

>>> Thanks for your Help
>>> Dani