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    Type:Bug 
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    Resolution: Duplicate
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    Priority:Major - P3 
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    None
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    Affects Version/s: None
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    Component/s: Sharding
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    None
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        Sharding
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        ALL
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        None
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        None
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        None
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        None
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        None
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        None
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        None
... in particular, certain numbers (numberlong, numberint) have the same representation as a string in BSON. This leads to duplicate key errors when generating chunk ids based off these values.
see SERVER-8787
- duplicates
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                    SERVER-4411 creating a migration lock on the serialized min chunk value has issues with bindata -         
- Closed
 
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                    SERVER-42106 Use auto-generated _ids for config.chunks and config.tags -         
- Closed
 
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- is depended on by
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                    SERVER-14759 Splitting very close to an existing double precision value causes missing chunks -         
- Closed
 
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- is duplicated by
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                    SERVER-8787 mongos crashing when running splits + inserts on collection with hashed shard key -         
- Closed
 
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                    SERVER-40061 Chunk move fails due to DuplicateKey error on the `config.chunks` collection at migration commit -         
- Closed
 
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- related to
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                    SERVER-27734 Remove the _id field from config.chunks, as it appears to have no utility -         
- Closed
 
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                    SERVER-27735 Remove uses of config.chunks' _id field -         
- Closed
 
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