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Type:
Bug
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Resolution: Unresolved
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Priority:
Major - P3
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None
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Affects Version/s: 4.13.0
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Component/s: Bulk API
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Labels:
When a bulkWrite is unordered, the indexes in the insertedIds do not correspond to the ordering of operation.
Minimal example:
Unable to find source-code formatter for language: node. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
const mongodb = require('mongodb'); const unorderedBulkWrite = async () => { const client = new mongodb.MongoClient('mongodb://localhost:26000/?replicaSet=replset'); await client.connect(); const collection = client.db('my_db').collection('test'); // create some data await collection.bulkWrite([ { insertOne: { _id: 1, a: 2 } }, { insertOne: { _id: 2, a: 3 } }, ]); // unordered bulkWrite const reply = await collection.bulkWrite([ { updateOne: { filter: { _id: 1 }, update: { $set: { a: 0 } } } }, { insertOne: { _a: 0 } }, { updateOne: { filter: { _id: 2 }, update: { $set: { a: 0 } } } }, { insertOne: { a: 0 } }, ], { ordered: false }); console.log(reply.result.insertedIds); return reply.result.insertedIds; } unorderedBulkWrite();
Then the `insertedIds`field looks like
Unable to find source-code formatter for language: node. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
[{
_id: '63b2efb47fb05e8aa2a06173',
index: 0
}, {
_id:'63b2efb47fb05e8aa2a06174',
index:1
}]
The indexes (0 and 1) don't match the indexes of the insert operations in the initial ordering. It should be 1 and 3.
This bug is similar with this (old, now fixed) bug https://github.com/mongodb/node-mongodb-native/commit/3be7f86a2dc6f7861d402b451446fc2a529007a6, so the solution might be similar.
