Description

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Engineering Ticket Description:

Subset of cases described in SERVER-14322 that can be safely retried as an upsert is when insert portion of update receives a duplicate key exception with duplicate key-values combination matching the query exactly.

Example:

db.foo.update({_id:5},{$set:{...}\},{upsert:true})

can safely retry full upsert if it receives error

"E11000 duplicate key error collection: bar.foo index: id dup key: { : 5.0 }"

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