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Type:
Bug
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Resolution: Duplicate
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Priority:
Minor - P4
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None
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Affects Version/s: None
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Component/s: mongoimport
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Labels:None
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3
I think this needs to be revisited.
The following applies to both MongoDB 3.4.14 and 3.6.2.
Given a simple collection to import like the following in a file called test.json:
{ "_id": "1", "a": 1 }
{ "_id": "1", "a": 2 }
{ "_id": "1", "a": 3 }
We get the proper output of:
mongoimport --drop -d test -c test test.json
2018-04-06T10:35:19.008-0400 connected to: localhost
2018-04-06T10:35:19.008-0400 dropping: test.test
2018-04-06T10:35:19.087-0400 num failures: 2
2018-04-06T10:35:19.087-0400 error inserting documents: E11000 duplicate key error collection: test.test index: _id_ dup key: { : "11" }
2018-04-06T10:35:19.087-0400 imported 1 document
However, importing a much [^zips.json] larger dataset with only 3 duplicates (zips.json, attached to this ticket):
mongoimport --drop -d test -c zips zips.json
2018-04-06T10:37:26.801-0400 connected to: localhost
2018-04-06T10:37:26.801-0400 dropping: test.zips
2018-04-06T10:37:26.929-0400 error inserting documents: E11000 duplicate key error collection: test.zips index: _id_ dup key: { : "32350" }
2018-04-06T10:37:27.004-0400 error inserting documents: E11000 duplicate key error collection: test.zips index: _id_ dup key: { : "63673" }
2018-04-06T10:37:27.086-0400 error inserting documents: E11000 duplicate key error collection: test.zips index: _id_ dup key: { : "42223" }
2018-04-06T10:37:27.125-0400 imported 29470 documents
mongo test --eval 'db.zips.count()'
MongoDB shell version v3.6.2
connecting to: mongodb://127.0.0.1:27017/test
MongoDB server version: 3.6.2
29467
Additional testing with mgeneratejs shows interesting results.
mgeneratejs '{"_id": "$age", "someKey": 3}' -n 1000 > ages.1000.json mgeneratejs '{"_id": "$age", "someKey": 3}' -n 2000 > ages.2000.json
Importing ages.1000.json imports only 48 documents.
Importing ages.2000.json says it imports 1000 documents.
Both collections only import 48 documents.
- duplicates
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- Closed
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- is related to
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- Closed
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