[TOOLS-1810] mongoimport reports wrong number of documents inserted on error - MongoDB Jira

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Consider a JSON file with an invalid document:

$ cat b.json

{"a":13}

{"a":75}

{"a":20}

{"a":89}

{"a":36}

{"a":64}

{"a":67}

{"a":32}

{"a":55,}

{"a":27}

Note the extra "," in the ninth document. Then try to import it:

$ mongoimport --drop -d test -c foo < b.json

2017-10-11T09:16:29.537-0400    connected to: localhost

2017-10-11T09:16:29.538-0400    dropping: test.foo

2017-10-11T09:16:29.538-0400    Failed: error processing document #9: invalid character '}' looking for beginning of object key string

2017-10-11T09:16:29.538-0400    imported 8 documents

mongoimport reports 8 documents being imported, but there are none in the collection:

$ echo 'db.foo.count()' | mongo

MongoDB shell version v3.5.12

connecting to: mongodb://127.0.0.1:27017

MongoDB server version: 3.5.12

bye

This is present in master:

$ mongoimport --version

mongoimport version: r3.5.12

git version: 3128427f77397916967e3eb684dfed845bb1638a

Go version: go1.7

   os: darwin

   arch: amd64

   compiler: gc

OpenSSL version: OpenSSL 0.9.8zh 14 Jan 2016

Same results (the number of documents reported and inserted differ) using --batchSize 1.

duplicates

TOOLS-1811 mongoimport can report incorrect number inserted if a JSON error occurs.