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    Type:Improvement 
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    Resolution: Won't Fix
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    Priority:Major - P3 
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    Affects Version/s: 3.5.0
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    Component/s: Write Operations
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returns com.mongodb.MongoWriteException: E11000 duplicate key error index during upserts instead of com.mongodb.DuplicateKeyException. It would be helpful if the driver returns com.mongodb.DuplicateKeyException so a user can take a useful action.