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Type:
Bug
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Resolution: Done
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Priority:
Minor - P4
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Affects Version/s: 2.2.2
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Component/s: None
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The bulk operation API allows passing a write concern object in two places: when the op is initialized, and when it's executed. If the user passes write concerns at init but not execution, and if the `execute` method is called in the promise form, the write concern object will be overwritten with `undefined`: https://github.com/mongodb/node-mongodb-native/blob/2.2/lib/bulk/unordered.js#L486-L493
Either write concern shouldn't be specified at init time, or a check should be made here to ensure `_writeConcern` isn't undefined.